This is mostly due to the simplicity of the design.
Is my roof furnace gas or electric.
Gas is cheaper than electricity in most cases which makes furnaces more cost effective than electric heat pumps in areas that experience colder temperatures.
An electric furnace is generally quieter than a gas furnace.
A gas furnace will have either a 3 6 inch sheet metal pipe protruding from the top of the furnace moving at an angle into the wall or ceiling.
Both oil and propane require fuel storage tanks that are expensive to install and maintain.
Both systems use a fan to force air through the heat exchanger or electric element which heats up as it passes through.
These systems combine both heating and cooling capabilities eliminating the need for a separate furnace indoors.
Packaged units may be either electric or gas and combine all system components into one cabinet which is typically found on a slab next to your home or on the roof.
One side effect of removing that extra heat from combustion gases is that the combustion byproducts are cooled down and released in a liquid form in high efficiency furnaces.
Gas powered systems use a heat exchanger and burner to produce heat while electric powered systems use an electric element similar to an electric radiator.
Gas furnaces are not necessarily noisy but they do make a loud rushing sound at the time that they start up and the burner ignites.
Gas furnaces are not always more efficient than heat pumps however.
You can use a couple of methods.
This is the exha.
Or this pipe could also be a 2 4 inch white pvc pipe.
In many cases furnace selection is largely dependent on fuel availability.
Should my furnace flue pipe go through the roof or the side of the house.
This allows your furnace to get more heat out of the gas that it consumes.
Natural gas is the most popular fuel but the required piping infrastructure is not available in all areas of the country.
This makes for a quieter furnace overall.