Sounds like a decent recovery time to get your heat back up. Where do you normally keep your thermostat Frank? Did it drop from 70-60 overnight or 65-60? Just curious.
The main thermostat is on a standby of 60 degrees. Our ranch house is almost 100 ft. long. So we have 2 furnace-AC units. The one unit maintains the living area and the 2nd unit maintains the 3 bedrooms and 2 master baths.
So when we are not in one area the thermostat is lowered slightly to 60 degrees. The wife and I figure if you aren't in a area of the house why heat it to 70 degrees. Works out just fine and sure lowers the heat bills. Mostly the wife's idea.
I was raised in a old farm house with a potbelly stove that went out every night. So hell I'm living high on the hog now. When I got married in 1965 I bought a house and install baseboard heaters with a thermostat in each room. Off subject now but from 1964 to 1971 my total electric 2 story house was on even billing of 11.00 per month. Never paid a 12th month bill as I was always ahead on payments. Oh how the cost has gone up.
When I built the house 19 yrs. ago I put up 6 in. walls and super tight construction. All wall plugs and switch boxes are caulked air tight. Every wall stud that has a hole drilled through it for electric wires is caulked shut. The best Anderson windows. Along the South Great Room wall there are 5 full length patio doors for heat gain. The patio door windows have blinds in between the glass and shut at night and opened when the sun comes up for solar heat gain.