25 cubic feet
No, the heat pump will also cool the home.
2.0 ton or 2.5 ton
A heat pump is somethign that heats water. It can be used to heat your water at home with your shower or you can have a heat pump to heat your pool at home or work
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.
The 1400 is not a pump. The pump version is the 1300.
A heat pump acts as a furnace in heat mode to warm the home in the winter, then acts as an air conditioner in the summer to cool the home.
There are a few things you need to consider before purchasing a new heat pump. Should you buy a heat pump or should you choose a better choice, for example a furnace? What size heat pump will you need to buy? How efficient do you want your heat pump to be?
An electric heat pump can heat up your home during winter and cool it during summer.
An air heat pump is used to heat and cool your home. It is like an air conditioner in the warmer months but then can also heat your home if the outside temperature is above freezing.
It depends on the layout of your home (1 or multiple stories?), how many windows, insulation, climate, and roofing. Factoring in all this, in a moderate climate you need a bigger heat pump. On average, in a moderate climate, you need a 2.0 ton heat pumpp in a cold/hot climate you need a 2.5 ton heat pump.
I do not know of any jurisdiction in which a license would be required for a heat pump.
Heat pumps are an economical way to provide clean heating AND cooling of a home.