Re: New Line Set for Central A/C System
First, I claim zero expertise with HVAC systems. Now that we've got that out of the way...
A few considerations:
Cutting open existing lines and letting the refrigerant escape into the atmosphere is a big no-no and could get you in major trouble with your local environmental protection agency. If you need to, you can probably have an HVAC technician purge the lines and recover the refrigerant before you dismantle the existing system.
I believe that fittings in refrigerant lines need to be brazed, not soldered. There's a difference; I'm not sure why brazing is preferred.
You can probably run lines yourself, especially if you can do it using flexible tubing so you don't have to braze any fittings. Then the HVAC tech can hook it up on each end. If you have the tools and know-how, you may be able to do up the fittings yourself. I can tell you how to solder water pipes, but I've never brazed.
Is this a single-story house? Maybe you can run the lines through the attic.
The "Senior Member" designation under my name doesn't mean I know a lot, it just means I talk a lot.I've been a DIYer since I was 12 (thanks, Dad!). I have read several books on various home improvement topics. I do not have any current code books I can refer to. I was an apprentice plumber for two years.