Old 01-19-2008, 09:06 AM
  #20  
broncobirdy
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Join Date: Oct 2003
Location: Chesapeake, VA
Posts: 3,616
Default Re: Mis-matching HVAC system (replacing outside unit without touching inside)

A little off topic, but it came up earlier. There is no way anyone is going to open my system with out doing a Nitrogen sweep and a vacuum for at least 24 hours, regardless of closing valves prior to opening up the system. 10 years working with a bunch of hacks and suddenly we are swapping out units for a industrial maufacturing plant! Go figure. Watch the mechanics also, I had one show up that I was loaning my tools to, and advising. The new rules play into the HVAC techs. Get to sell you a whole new system when the shelves are clear of the lesser effecient stuff.
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