Hi there ...
I had yet another estimate on replacing my A/C and furnance with a
unit that has a variable speed air handler in order to attempt to
achieve better humidity control.
One option that has been mentioned by a few of these contractors is to
upgrade to a heat pump. Now the contractor who was out yesterday said
I wouldn't be able to go to a heat pump because "there aren't enough
wires" running outside to the existing exchanger.
I have no reason to doubt him but I am curious if any of you could
tell me what the heck he is talking about.
With a heatpump, you need more than a 2-wire low voltage wire running to the
outside unit AND you need additional wires for the air handler AND the
thermostat. In fact, you would need a different thermostat, too.
If he can't put a heatpump in because he won't run new low voltage wiring, I
would run away from him FAST!!! Get at least 3 REPUTABLE contractors to give
you quotes (not estimates!).
This is Turtle.
Regular type hvac systems and not heat pump type , when installed , only run
2 -- # 18 or # 20 control wire to the out side unit. The Heat pump requires from
5 to 8 wires to be going to the outside unit from the furnace. So it's a not
enough wire with 2 wires going there and he feels that running another set of
wires out to the condenser would be too hard of a job for him. Now running
another set of wire out to the condenser is some trouble but it can be done. I
must be gifted for I know how to run another set of wires to the outside unit.
There is no such thing as can't but is called Difficult to do.
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