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A commonly used formula is 600-650 square feet per ton. So it would be recommended to use a 2-ton heat pump for a 1300 square foot home. However, other variables are often considered, too, such as the age of the house.
A 4 ton heat pump should be fine, depends on how well your house is insulated. If the house is well insulated you might be fine with a smaller unit.
No. The compressor is needed to run in reverse in order to pull warm air from the outside to heat the home.
No, the heat pump will also cool the home.
The purpose of a thermostat on a running heat pump is to be able to determine the temperature the pump is operating at. This is used for regulating the heats needed.
Heat pump. (electricity)
A heat pump is often used in air conditioning units and refrigerators because a heat pump is used to transfer heat from one place to another. Often heat pumps are used to remove heat from a building
Window units are used to heat specific areas of the home. If you want to heat your whole house a heat pump is the better choice.
I would recommend this site here http://www.ehow.com/how_2125874_install-heat-pump.html. It will give an easy step by step directions to install your heat pump.
All the heat pumps that I know of are electric. Some may have gas backup-- in very cold conditions , heat pump will not work, so some kind of backup is needed.
buy a window, thru the wall, or portable unit. you can size it wherever you buy it. they will have a chart of some sort to size it for you.
On a thermostat, "EM heating" stands for emergency heating. It heats your house up very quickly, and is costly to run. This is suppose to be used if you've lost heat from your heat pump or if you've turned your thermostat way down and need to heat up your house quickly.