Hey guys, i got this question the other day. This should be a pretty quick video compared to a lot of my other videos. Somebody was basically asking me: why are the copper line sets on heating and air conditioning units? Why are they insulated sometimes, and why are sometimes they not typically, what you'll see is if it's not a package unit, so package unit, meaning everything is outside in one unit. If you have sort of a split system of some type, maybe you have an outdoor unit and it's matched with either an air handler inside or maybe you have a furnace with a coil and there should be copper line.

Sets that run between the two. Whenever you have some sort of split system like that, you'll see at least one of the lines insulated. Is it good to keep that insulation up to date and all that good stuff, of course, the better insulated? It is the better that system can run. In some cases you know, if you're on a real hot summer day and that landsat runs through a really hot attic better, it's insulated, the better off you'll be, but the question that i was actually getting was well.

Why is it that sometimes both of them are insulated and sometimes they're not, and the answer is pretty simple, on a standard split system? The reason only one of the lines is insulated is because the metering device it's what we call it. It's the part of the system that will restrict that refrigerant, making the evaporator coil do what it's supposed to and that metering device could be us a piston or orifice back in the old days. These days we have valves, that'll, open and close, whether it's a txv or some sort of electronic expansion valve. But ultimately, the main reason is is because that metering device is in the indoor unit.

So whenever you see like many splits or other systems that both line sets are insulated, the reason is is because the metering device is outside it's at the outdoor unit, and if you don't insulate those line sets, they will condensate and you will have dripping. You know. It'll, actually, the lancets will actually get condensation on the outside of it and it will drip in your attic or home or wherever they run through because they're not insulated very well. So that's the main reason if you do have lancets and they are insulated.

If that insulation gets damaged or it starts to get old and brittle and break away, definitely get that replaced because, yes, it helps with efficiency a little bit, but the main reason is: if you don't get that replaced in ac mode, it could create condensation and create A water leak water damage in your home, so i hope that helps thanks for watching hit that subscribe button. We'll see you next time, you.