Quote:
Originally Posted by AC_Hacker
This is very curious...
If your logic is correct, you have just defeated heat pump heating, and all other low temperature heating strategies.
Because heat from an oil fired heating duct can be uncomfortably warm, but does that mean that a heat pump heated house with the same inside air temperature would feel less warm, therefore less satisfying than oil heat?
If you wanted to actually enjoy the efficiency gain of a larger condenser, you would need to increase the volume of air through it, to get those BTUs into the room.
Or, if radiant floor was your heating method, you would need to increase floor efficiency through lower R-value materials above the heated part of the floor structure, and/or increased pipe density and/or increased water flow rates.
-AC
-AC
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More indoor coil surface area is great for heat pumps in heating mode. Lower coil bypass factor will mean lower head pressure with the same discharge air tempatures. Airflow does not need to be increased to make it happen, although higher airflow rates would lead to further reductions in head pressure at the expense of lower temp at the register.
Register temp 100-110f is warm enough to reduce the "cold draft effect" but cool enough for efficient operation. This is where variable speed blowers help, no "cold blast" when the blower first kicks on.