If this is gas or propane fuel, windows are excellent and insulation
is right, then that is a long time. However, if you have a heat pump,
that sounds about right. Activate the emergency heat option which will
use the resistive heat strips and watch your electric meter whirl.

On Sun, 25 Jan 2009 20:47:15 -0500, KLS wrote:

Just had the blower motor replaced on our York furnace this morning.
Outside temps were 20F today with some wind. The new motor was
assigned the task of warming the house from 45F to 65F. This took it
7 hours, which seems like a long time.

How many degrees per hour is a usual rate of temperature rise for gas
forced-air furnace?