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We had a carrier infinity system put in 2 years ago with the Carrier brand touch control thermostat which looks to use 4 wires, a,b,c, and d. the system is two zone (upstairs and downstairs) with...

We are looking to install new system that has to be in attic. some contractors are saying use the filter unit that is installed as part of the blower/furnace package which means its in the attic. ...

So you are suggesting in #1, coming off the blower/furnace in attic, have the main ducks split, one handling upstairs and one downstairs, then have each one with a damper to adjust flow? Ill...

We are getting quotes on new complete a/c with ducting for our 2 story house (2600 sq ft) in los angeles. our home is like a rectangle box built in 67' with stairs in middle so pretty basic setup...

So currently we live in 2-story 2600 SF home in SoCal with obsolete a/c. The bedrooms are all upstairs with living room, kitchen, den etc. downstairs. Looking to install new system heat/cool and...

We live in a '67 2 story house in Woodland Hills, CA, Many years ago the original central went out and has since been dumped but still using the old gigantic furnace heater. Now looking to replace...

Ive been following this forum for quite a while and decided to jump in. To begin with I am a homeowner and not a HVAC dude but we recently purchased this 2 story home in the San Fernando Valley (hot...