High SEER systems are debated behind the scenes by HVAC techs everyday. Are they really worth it?
Does it make since to invest in a HVAC system with inverter technology? They are typically quite a bit more expensive to install than a regular single-stage or two-stage AC/Heat Pump system. So will you get your money out of it?
Are the parts more expensive? Can they heat and cool my home as well?
All that and more explained in this video!
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Hey guys before we get to the video for more tips and tricks in the heating and air industry, please click that subscribe button. Thank you. Hey guys, joshua griffin here serving the middle peninsula and the northern neck of virginia and wanted to do a video might be a little controversial. I feel like out there in our industry, there's probably more conflicting information about this one topic out there than just about anything else, and that is because we are starting to see a transition starting to see a change in our industry, and obviously new technology comes out And things like that and there's you know, there's always going to be some push back against stuff, and things like that.

So i wanted to do this video we're going to go through the pros and cons of where the industry's going with inverter systems communicating technology and such like that. But the main reason i wanted to do it is because i've had some comments on our videos and i actually, when we're looking at jobs every day, we're up against other opinions and and at times misinformation, and so one of the things i hear a lot when We first start talking about inverter technology, and the pricing, and things like that is folks like to talk about you know, is the is the saving significant enough for you to pay all this extra money for a more efficient system? The answer to that question is every house is different and it depends on your situation in our area. There's people that have vacation homes and things like that and if you're not there during the winter time, you're only there for a few months of the year or whatever you're not going to be there enough to see the mileage to get. You know the savings that you need to get your money out of it.

So if you're, you know, if you're looking at that. That obviously would play a role in that. But if we're talking about your primary home, we're looking at you know a system that does the majority of your heating and cooling in your home, uh there's. You know i call them old-timers, but there's even younger guys that still have this old-school mentality and they'll say things like that: you're not gon na get enough savings for you to for it to make sense for you to do an inverter system or to install a Higher seer system right, i just from my experience - that's just simply not true.

I can tell you for me personally. I had a 12 seer package unit on my house when i bought it and a couple years later, we installed a split system, so we went from a package unit outside that was exposed to the elements and we went up in sear and we brought the air Handler in so we did a split system where there's an air handler inside and the outdoor unit is still outside and we've seen a significant savings. Again every house is different, but at our house you know, we've actually saved several hundred dollars. Uh there were winter months with that package unit that we were seeing electric bills almost six hundred dollars, and now i we have not received a bill over three hundred dollars since we installed that system was that the case every month that we were seeing six hundred Dollar power bills.
No, but even if you're only seeing a hundred dollar savings every month with your inverter system, then if you do the math, you know an inverter system and it's going to be two thousand dollars higher than say a single stage or a multi-stage system. Then, if you're saving a hundred dollars a month within two years, you're going to be in the black right, you know what, if there's a five thousand dollar difference. You know i've i've heard guys say you know, you're not going to see the savings and what? If there's a 5 000 difference well, you know: do the math in just over four years, you're actually going to be saving more money on that system than you would have with a standard system? So obviously it makes a difference on whether or not you're going to be using the system a lot if it's a second home or just a system that you don't use a lot. Maybe it's in a part of the house that you rarely turn on anyway, then you know, maybe it doesn't make sense to spend that extra money.

Here's another thing: if you're planning on selling the house soon so in two years, you're planning on selling the house, then maybe you wouldn't see enough savings for it to make sense for you to put a 20 seer system in there. So i hear all the time in our industry guys will say: well, you know it just doesn't make sense. It's too expensive they'll never see the savings. In my experience, that's just simply not true.

If you have a technician telling you that or a contractor telling you that maybe just maybe they're trying to tell you that, because they haven't installed enough inverter systems to know better, and maybe you should get a second opinion from a company that has installed several of Them and they still may shoot you straight - they may say you know yeah, we install inverter systems, but you know you're just for your particular situation. It makes more sense to do you know this or that right, so you know getting multiple opinions uh, but you know if you got that old school mentality, if you're hearing you know it just doesn't make sense uh it chances. Are you got somebody that just hasn't installed enough of them to know better? In my experience, i get people all the time commenting on my videos telling me what i'm wrong about and i'm sure somebody will tell me i'm wrong on that. But i can tell you from personal experience, and you know in business experience that the inverter systems are worth what you spend extra money on.

Another argument that i'll hear from some of those guys is the parts are a lot higher and i have to agree with that. As time has gone on, we have seen a humongous shift in our industry where things like fan motors. When i first started in the industry, you know you could carry four different motors on your service van and you could pretty much get anybody rolling in the middle of the night uh with just about any situation just about. We could get them rolling with those four motors, two outdoor motors with two different rpm speeds and two indoor motors with two different voltages, and you know multi, taps and stuff like that.
So i could do a rescue motor and get those folks back on those days. Are starting to end, they haven't completely ended, but they're well on their way. So now, when you look at things like variable speed motors, you know, some of these manufacturers are charging five six seven eight hundred dollars for just the motor. So, are we seeing a significant price increase across the board for parts and things like that? Yes, but i would argue when we're talking about inverter systems, if they're installed properly, they actually have less wear and tear and fewer breakdowns.

In my experience now somebody else tells you something different and that's not true in their experience, then that's their experience, but in my experience we install these inverter systems and years will go by before i hear from those folks again uh, you know if they're, especially if They're doing a proper maintenance to their system and things like that, that's the only time we see them after that. So let's talk real quick. You know i'm going to get into more pros and cons, but let's talk real quick. Why? I think that is.

Why are we seeing less wear and tear on a inverter system versus a single stage system well to make a really long, complicated subject? I'm just going to give you the short version, and that is imagine if here up here is the top operating speed of your heating and air system and then down here is the bottom. Well, if you have a single stage system, it's either off or it's on. Okay, so you're just seeing this constant, you know when it comes on. It jumps all the way up here when it goes off, it falls all the way back down and multi-stage systems.

You know there will be like a 65 or 70 percent stage. Sometimes there's several stages and then there's the top right and the the idea is, you know, you're still, you know jumping up to there or jumping all the way up to here, whatever stage that it jumps to you're. Seeing that you know still it's a spike in energy that there's capacitors and things like that to help the system get up and going, but that is i, that is where you see a lot of your energy consumption that spike in energy when it first comes on. With inverter systems there's you know, there's off and then there's one and there's a lot of in between okay, so there's gon na be times especially like on a mild day on a mild day with your heating and air system with a single stage, it's still off Or on remember you know, but with an inverter system that thing might be just barely running and it's keeping your house comfortable.
Okay! Sorry, if you hear my dogs in the background, so obviously that is part of the reason it saves energy. But i, in my experience, have found that that's also part of the reason that we're seeing less, wear and tear on the system. You know when it's having to go. You know that's a lot on that system at times right, but with that inverter system.

Imagine it's just barely going down the road uh. You know if you're driving a car and you're only going through a 25 mile an hour speed versus a car that goes 100 miles an hour but then comes to a screeching halt and then goes up to 100 miles an hour again. And it comes to a screeching halt, so that's kind of the analogy i would say we're even seeing some companies come out with inverter systems and higher seer systems and they're putting lifetime warranties on their equipment lifetime, warranties on the compressor lifetime warranties on this or that They wouldn't be doing that if they thought that they were going to have tons of breakdowns and things like that, so the other thing i'll say is, if you have somebody that has, you know, had a lot of issues with this or that maybe it's the install In fact, i would argue that, most times it is the install whoever installed it. They, you know, cut some corners or they didn't do something correct and that's why you're having issues the the couple issues that we have had uh with the inverter systems that we're installing have always been just tweaking something here or there updating the firmware on the thermostat Or you know changing a dip switch on a unit things like that uh, but we don't see significant huge.

We have not replaced an inverter compressor in these higher seer systems. Now i've seen some replacing ductless units, but that's a different story. Another argument that i've heard recently is folks are saying something to the effect of well. They haven't perfected the technology and i guess i would probably agree with that, but in my mind, saying that they haven't perfected the technology, it doesn't give it a pass.

It doesn't mean you need to fully avoid that technology uh, it's like saying. Well, the internet they're perfecting the internet right now. So you probably shouldn't use the internet. Well, you know they probably are perfecting it.

You know they're changing things. Websites are being built whatever. It's not perfect, but it's still a great technology right, so that would be my argument to that. Anyone that says that they're perfecting the technology, and so they wouldn't install any of those systems again.

In my experience, they probably have just not installed enough of them to know better, so real, quick, they're, a higher seer and obviously they're more efficient. The other thing i'll tell you about an inverter system. Is you know when they're comparing apples to apples with these systems? I did a whole video about why they're gon na do away with sear because they're having to compare these systems apples to apples when they're fully running but with inverter systems, they're not running at full speed, all the time so there's times where again, it's just barely Running and it's saving you money, so they're high, efficient, they're, less expensive than geothermal systems. If you say that about geothermal, i would maybe agree with you if you said: hey the money that you're going to save over the years, you're not going to get enough mileage out of it for you to make sense for you to install a geothermal system.
I would maybe agree with that. You know again. Every house is different and that may be true, but when we're talking about just going up from say a 14 16 single stage system up to say an 18 or 20 seer inverter system, not the same thing, you're gon na see quite a bit of savings there. Another pro to inverter systems is in general, they're, better at humidity.

So if we're talking about those inverter systems and they're communicating technology and the variable speed fan motor, those systems are barely running at times and they're still removing humidity from your home. So they do a better job of removing humidity. In fact, a lot of ductless units, which, oh by the way most ductless units, are inverter technology. When we're talking about ductless units, a lot of them have that dehumidifier mode, they might call it something different different verbiage, but in general it's you know, a lot of them will have like a little raindrop or something like that on the remote you put it in That mode and it's dehumidifying, your home, the last thing i'll say as far as pros, is just making sure that you're finding a good company somebody that's installed them somebody that has a manufacturer behind them with some good infrastructure.

A lot of the horror stories that i hear are people saying well, you know my contractor won't call me back now: i've called the manufacturer, i'm having these issues, etc, etc, and you know that sounds like a nightmare. Obviously, of course, you could have that with a single stage system too, but when we're talking about inverter systems with communicating technology, it's not as simple as just getting the refrigerant right or something like that. You would have with a single stage system. There could be lots of different things: there are more bells and whistles and you're trying to get all that straight for the system to run tip top.

So let's talk about the cons, obviously i'm a fan of what we're installing i would even go so far as to say we sold more inverter systems last year than anything else, and so obviously i'm a fan. But let's talk about a couple cons, a couple, bad right: if we're talking about the good and the bad, let's talk a couple, bad things. Well, one thing is your options on thermostats are limited. So if you are a fan of a particular type of thermostat, we have homeowners all the time, that'll say: well, you know i i want this particular thermostat.
I had it in my house or i like it or whatever. The reason is when you're talking about communicating technology, your options are limited. In fact, with some manufacturers you only have one or two options. So if you have a high sear system, you have to install their communicating thermostat and that does limit your options a little bit.

I would say that if that's a concern of yours get your contractor to put that thermostat in your hand before you buy it, we've done that before. If we've got somebody on the ropes or they're thinking about this or that or whatever, and they want to hold the thermostat, see what it's going to look like on their wall and so on. We can do that and then the other con that, i would say is there are more bells and whistles on the systems and a lot of these old-timers when they're, using this old-school mentality. The one thing that i would maybe agree with them on is there are more bells and whistles technically more things that can go wrong and it's sort of like if you're, comparing a high efficiency furnace like a 95 furnace to an 80 furnace, there's more bells and Whistles there's more things that can go wrong.

There are pressure switches that maybe the 80 furnace doesn't have, or whatever there's more bells and whistles there. So in general i would agree with that. Now again, i would go right back to what i was saying before is there's less wear and tear on the system? So, even if you have to end up replacing a sensor or a switch or something like that, you're in a lot of cases, you're not replacing big components like the compressor or even the coils, because the coils are getting less abuse too. That's the thing.

The pressures are not when you're going from a single stage system, when it's running way up here all the time that coil is experiencing a lot of high pressures, a lot of abuse. I would say right that they're not seeing with an inverter system in a lot of cases, so just to wrap up sorry. This video was so long, but if you are in the market for a new heating and air system definitely talk to a couple different folks. You know if you've got somebody telling you some of the things that i just said: oh they haven't perfected the technology or you're never going to save enough money for it to make sense or whatever.

In my experience, those things are just simply not true get a few opinions. Talk to a few different contractors, compare apples to apples and make a decision that makes most sense for you. In my experience i would say overall when folks are trying to decide what brand they should install or what seer rating or all that stuff, i would say in the long run, you're not focusing on the right thing in the grand scheme of things it just doesn't Matter as much as it does on who you pick to install it, so i would say, find a good contractor someone with good reviews, someone that cares, someone that's going to talk to you and somebody that can tell you why they're selling you what they're selling, if Someone asks me hey: why do you sell what you sell? I can tell them exactly why i sell what i sell in my market. I sell what i sell, because it's the best that this and that right, but you know not every market's the same.
Don't ask me what brand you should install because again, you're focused on the wrong thing. The last thing i'll say is if you're in the market for a new heating and air system and you're in virginia and the middle peninsula or the northern neck, give griffin air a call. We'll give you a free estimate and the best warranty in the area. But if you're, not in our coverage area check out my new website, i've even got a little banner up here.

New hvac guide, dot com check out that site because we've put so much information on there. It's as if i wrote a book telling folks, hey here's. The good and the bad avoid this or that i've even got a whole page called no knows things to stay away from, and so before you spend thousands check out that website and finally, for more tips and tricks in the heating and air industry. Click that subscribe button, thanks for watching.


32 thoughts on “Hvac inverter systems. good and bad. are high seer systems really worth it? here’s the truth!”
  1. Avataaar/Circle Created with python_avatars Virtual_Bomber says:

    Even when I was going through tech school a few years ago, just reading about these systems just screamed โ€œwe should be installing theseโ€.
    I think the issue is with these old school techs donโ€™t truly understand Air Conditioning. This may sound arrogant but itโ€™s the truth.
    Itโ€™s coming down to where you just canโ€™t swap a capacitor, jam more refrigerant in it, and they are unwilling to learn.
    The only thing that makes an issue on these inverter systems is having the correct technical data for the system. Such as temp sensor resistance values and how the data lines pulse voltage in certain modes(and among other brand specific things). Itโ€™s not that hard.
    Even if you take the money saving out of the equation, any kind of multistage or inverter system just has an amazingly higher quality of air in the home.

    My 18 seer mini split in my sun room (that I installed) always feels amazing if I have it running. Especially compared to my single stage 15 seer American standard unit for the house.

    It comes down to that a lot of techs donโ€™t know what they are taking about half the time and are not willing to learn anything.

    This doesnโ€™t apply to every old technician obviously, but itโ€™s a damned surprising amount Iโ€™ve come across.

  2. Avataaar/Circle Created with python_avatars TEX SUN says:

    I have a question about my thermostat. I just want a second opinion. I cannot find this specific
    question online, your help would be appreciated. If my inside home temperature shows on my thermostat
    to be 79, but my set temperature is 80, should my A/C run or not come on??๐Ÿค”๐Ÿค  Service area Barrhaven??

  3. Avataaar/Circle Created with python_avatars Garth Clark says:

    One thing I noticed in newer HVAC are the main boards that the L1/L2 115V/230V cables connect to. No longer do I see contact switches so the electronic boards are taking the amperage hits with every start cycle. Guess what? Those printed circuits are NOT reliable as the solder and the stripes tend to break/crack due to heat cycles. Then, when they fail, the part is $600 !

  4. Avataaar/Circle Created with python_avatars Wite Powa says:

    I was quoted $15k for the ComfortMaker 4 ton CCA7, N style evap, and G96 furnace with installation, without duct work. Is this right? I assumed ComfortMaker was the cheapo poor people hvac system? Last year I was quoted $12k for a top of the line Trane XV18 system. Wtf?

  5. Avataaar/Circle Created with python_avatars Chris N says:

    Great Video! You have helped me a lot with my higher SEER question.

  6. Avataaar/Circle Created with python_avatars D says:

    As an HVAC contractor for over 36 years, the bottom line is every home and every lifestyle is different! There has never been a one size fits all system. Every home and location has its own special and unique challenges! The new set of challenges we have now is efficiency vs longevity! The old equipment was designed to last 25 plus years, while the new equipment want last anywhere near that but is more energy efficient! So we now trade longevity for efficiency! Are you in Nepean ?

  7. Avataaar/Circle Created with python_avatars Enoch Furyan says:

    What inverter system would you recommend to replace 4t heat pump?

  8. Avataaar/Circle Created with python_avatars Donald Jackson says:

    You sound very professional thanks for all your advice.

  9. Avataaar/Circle Created with python_avatars TEX SUN says:

    Can you please give me an opinion of an Amana 16 seer outdoor A/C? . I read online that they
    have a problem with their compressors because they are not insulated, I wonder if they
    corrected that issue, if that is true?

  10. Avataaar/Circle Created with python_avatars Jim Adams says:

    Home owner question here. Is an inverter system a heat pump? Thanks.

  11. Avataaar/Circle Created with python_avatars John Windsor says:

    As a licensed contractor in south Florida 30yrs in business, I totally agree with you. It all depends on the current living conditions, and what the customer is trying to achieve. If it's a simple 2 ton system in a 800 square ft apartment, then an inverter system may not be a first choice. 3 to 5 ton, multiple zone system homes, then yes, I have no problem suggesting an inverter system.

  12. Avataaar/Circle Created with python_avatars Wizard 2000 says:

    Great videos! I just installed Tranexv20i, what is the best fan mode auto or always running?

  13. Avataaar/Circle Created with python_avatars nightmare in action says:

    Haven't watched video yet I my opinion inverter drive is way better for constant temperature controll

  14. Avataaar/Circle Created with python_avatars Adam Luke says:

    Thanks! About to put a 3 Ton Bosch inverter package unit to replace a failing '94 Trane package in PHX. Feeling good about the decision and appreciate your reinforcement.

  15. Avataaar/Circle Created with python_avatars The Insufferable Tool says:

    Iโ€™m getting a Modulating AC because Iโ€™m an idiot and just had to have the Modulating furnace. Iโ€™m not remotely concerned about efficiency but having a modulating furnace without a modulating AC seems stupid. So this way. I can have what I really want a system that doesnโ€™t shock cool my house and fast cycle like a son-of-a-gun. I am looking forward to better comfort and dehumidification and less stratification in my home. Pumped.

  16. Avataaar/Circle Created with python_avatars S. J. says:

    Can you tell me which manufacturers are offering lifetime warranties on their A/C units? I am guessing these inverter units have self-diagnostics to point the HVAC tech in the right direction? Can you also tell me how some contractors botch the installation of the units?

  17. Avataaar/Circle Created with python_avatars Michael Graves says:

    Not interested in the savings. For our main home, interested in the difference in noise and comfort.

  18. Avataaar/Circle Created with python_avatars Phillip Joy says:

    Good videos. I wish more folks would focus on getting their ductwork correct. Service area Kanata??

  19. Avataaar/Circle Created with python_avatars Robert Moran says:

    The new Mitsubishi air ducted system runs at 4 amps at full capacity.

  20. Avataaar/Circle Created with python_avatars Robert Moran says:

    You better have your ductwork sized properly If you install a high seer system.

  21. Avataaar/Circle Created with python_avatars Marc Gallant says:

    Just grabbed my second Daikin aurora(20 seer/12.5 HSPF), the mitsubishi hyper heat(30.5 seer/12.5 HSPF) was $500 more and I would only break even in 15 years with our electricity rate, no thank you lol
    * note I was looking at 3/4 ton 9k BTU units

  22. Avataaar/Circle Created with python_avatars Andrew Girgen says:

    Man, o man. I live in Central Florida and am currently on my 5th installer coming to give me a quote on replacing my 18 year old Carrier system. Every one of them have told me at lease one of the reasons you mentioned in this video as to why I don't want a variable speed system. Every one of them was an "old timer" as you say… They strait out REFUSE to install them. So frustrating. great video, wish you were in my area.

  23. Avataaar/Circle Created with python_avatars mesedrew says:

    However I have seen 20, 30, 40, 50 and even 60 year old single stage systems still running without leaks, on the original compressor and heat exchanger! Are you in Orleans ?

  24. Avataaar/Circle Created with python_avatars Wayne Springer says:

    The best way to evaluate if it is "worth it" is to thoroughly evaluate your electricity usage and cost. My entire monthly electric bill averages $100/month in winter and almost $200 month in summer, and that is with a 38 year old Magic Chef furnace and an 8 year old (old freon) cheap bottom of the barrel AC unit. I would estimate a savings of around $20 in winter and maybe up to $50 so therefore overall return on investment costs of the difference between units would be 10+ years to actually see "savings"…..I'll see the biggest savings just from upgrading to a newer low seer unit.

  25. Avataaar/Circle Created with python_avatars Raul Jidy says:

    Thank you for passing on your knowledge and insight! I wish I was in your area as I would love to work with a profesional like you! Unfortunately Iโ€™m in Sunny & Humid Florida.

    Anyways, I have a home in Central Florida built in 2007 running a 5 ton carrier with 13SEER. Iโ€™m getting ready to replace this unit before it fails on me, in the middle of summer. The house is well insulated and the ductwork works perfectly with my existing unit. Iโ€™m considering installing a Lennox inverter unit. My concern is that as the unit slows down I might not get enough air on the opposite end of the house from where the Air Handler is. The AC space on the house is 2800 ft.ยฒ

    I would very much appreciate your thoughts on this.

    I will be subscribing to your Web site before I proceed with the purchase to make sure I get things done right.

    Thank You ๐Ÿ™

  26. Avataaar/Circle Created with python_avatars Wes says:

    I love your posts , I wish I lived closer to ya , we could use a good Hvac guy.
    I install and work on large Servers and deal with power all the time. The first thing I look at on any type of power rectification is the smoothing capacitors. If you see United Chem,Rubycon,Hitachi,Panasonic, Elna,Kemet,Cornell-dubilier,and Nichicon your good to go. If you see JUNG-FU or FU-ME or some other strange name,run like hell.
    These Inverter heat pump systems need clean power and the capacitors are used continually in a high heat area , I have seen 50,000 dollar computer destroyed because they went cheap on one part. They had Chinese capacitors in them , that tells me they cut corners everywhere.
    I will only put in or replace boards in computers or buy equipment that have Japanese or American made caps in them and then rated properly for the environment there in.

  27. Avataaar/Circle Created with python_avatars KTMs 1 says:

    In California we have a $0.29 pkwh peak rates all year long which is from 4:00 p.m. till 9:00 p.m. . That is the main time you're actually going to use your air conditioner so a high seer unit pays for itself so quick here with 106ยฐ days common in summer. We kept being told it's not worth upgrading to a high-sure unit because the cost of the unit is so high and parts are expensive but we saved easily over $1,000 a year with our 19.5 seer unit and our air conditioner has a 10-year Parts warranty so I just don't get the reason these AC installers try to sell you the "middle road" units sometimes.

  28. Avataaar/Circle Created with python_avatars Rick Reeder says:

    I think the answer to which is better is far more nuanced than the discussion suggests. Pure SEER comparisons and a utility savings is only part of the story that does not give a full picture of the total cost of ownership over the life cycle of the system. And the life cycle of the system depends largely on geographic location. For example, here in the swamp we call South Florida, we have as a norm, poor duct-work that was sized was too small to begin with, common power quality problems, and most importantly, an operating duration of 10-11 months per year for air conditioning. If you have a home that was built during SEER 12 system minimum standards, installing a 20 SEER system without some very serious analysis of duct-work, especially on the return plenum is a great way to beg for huge customer problems including mold in the supply duct from condensate that has blown off of the evaporator coil from excessive velocity. So now, even after getting the customer to pay for the duct upgrade, if the installation does not include surge protection, shielded conductors on high voltage power conductors located near electronic circuitry, and some other considerations, you will likely get 12 years of service from this unit in our location, because our location has double the annual operating use than other places. So now, what is the total cost of ownership difference for the 12 year period? I don't have a strong opinion either way on the issue. For homes that have residents who need high indoor air quality with tight humidity control, inverter systems are great. For people who don't have such needs, and who have a new home that already complies with the 2006 codes for return ducts in all living spaces, a less expensive, lower SEER unit might be just fine, particularly if they get to skip having to do duct work too. But each of those parameters are only a part of the story when factoring total cost of ownership. My personal 3-year old home system has had an expensive communicating board replaced on the condensing unit, but overall, I am very happy with it. In-rush current starting compressors with a contactor is a huge power consumer and is hard on compressor life. I do appreciate inverter systems for that improvement in design. Service area Ottawa??

  29. Avataaar/Circle Created with python_avatars big4g63t says:

    my bosch 2.0 system is great saving me an average of 70 dollars a month

  30. Avataaar/Circle Created with python_avatars AD Electronic Teardowns says:

    SEER rating is not linear as it increases, SEER efficiency becomes less as SEER increases per unit of SEER.

  31. Avataaar/Circle Created with python_avatars AD Electronic Teardowns says:

    Then an ECM replacement cost and wipes out 15 years of saving. Are you in Ottawa ?

  32. Avataaar/Circle Created with python_avatars The1JBanks says:

    How do you feel about the boards on the inverters getting fried by power fluctuations or surges. The minute it breaks you loose all the "savings". I have heard about putting a whole house surge protector in or using a surge protector for just the equipment to protect the board from getting toasted.

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