I should not run the bath fan in the winter to save energy
The annual energy penalty
to run a bath fan is usually measured in single digits; that is less than $10. In fact it can be less than $2.00 if you have a poor fan that doesn't move enough air.
The fan can help reduce condensation by removing excess humidity from showers and baths. This makes the water sensitive building products in your home last longer. It also helps reduce the occurrence of mold and critters such as dust mites, which aggravate allergies.
A good exhaust fan should be quiet. It should be installed with a minimum of flex duct (all rigid pipe is the preferred method) with a minimum of turns and as little pipe as possible. And, it MUST vent to the outside. Fans should never be vented into attics or the pipes ended in the soffit; neither is an acceptable practice.
If I want my house to warm up faster I should turn the thermostat all the way up.
Behind the dial a thermostat is a switch; it has an on position and an off. It's a really stupid device, it only "knows" whether the temperature is above or below the set point, not by how much. Your heating system runs at the full output whenever the thermostat calls for heat. It doesn't matter whether it is calling for the system to raise the room temperature five degrees or twenty.
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