"T.G. Lambach" wrote in message
...
Hi,

I need some thoughtful thoughts about blower speeds.

First the facts: I have a Sears 105,000 BTU / 84,630 BTU natural gas
furnace in a 1,900 sq ft 2 story house.

The thermostat is a Honeywell programmable with "fuzzy logic".

The blower speed is currently set at "Med-Lo" which is about 1,100
cuft/min or 70% of maximum (1,500 cuft/min) volume.


Question: Would the furnace be more efficient at a higher blower speed?

If so, is there a benefit from adding an outdoor temperature sensor to
trigger the higher blower speed when the outdoor temperature falls below,
say 45 degrees F.?

Any thoughts will be appreciated.

Tom

Leave it alone...higher for cooler...slower for warmer...oh..whats the
static pressure for that unit, and whats the heat rise set to?