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There are many factors to consider when you want to see how much money you will save with a ductless heat pump. It is almost impossible to predict exactly how much, but here is a simple formula to follow that will give you a minimum percentage of energy savings.
We need to start with your current heating system to calculate how much money you will save. Here are two factors that you need to know about.
1. How do you heat your home? Are electrical skirting boards, oil, propane, natural gas, wood?
2. How much does it cost you per unit of electricity (energy)?
You should also know that your energy consumption in NB Canada is divided into 3 categories. According to NB Power, 60% is used to heat your home, 20% for lighting and electrical appliances and 20% for domestic hot water use.
For example, if you have electric heat, your system is 100% efficient, which means that for every dollar of input, you receive one dollar of output (usable energy).
How to determine the heat loss of your home? Software is available, or you can contact an AHRI certified HVAC contractor to do this, but as a good rule of thumb, while you wait for your home’s construction and age, 3,415 watts per cubic foot is a safe bet.
So now let’s find out the heat loss from this 1,000-square-foot house:
(Square feet X Watts X ceiling height = Heat loss in BTUs per hour)
1,000 X 3,415 X 8 = 27,320 btu per hour
The Mitsubishi MSZ-FE18NA has a heating range (output rating) of 7,500btu to 29,700btu output)
The Mitsubishi MSZ-FE18NA has a heating power (input rating) of (520 watts to 2420 watts per hour), there are 1000 watts in 1 Kw of power.
We are ready to calculate the energy savings.
Current home with electric baseboard heating with a heat loss of 27,320 btu’s per hour with $ 0.098 cents per KW hour. There are 3415 BTUs in 1 KW of electricity. 27,320 / 3415 = 8 KW hour to heat this house
House with electrical socket: 27,320btu (8Kw) X $ 0.098 X 24 hours X 30 days = $ 564.48 cent to heat this house.
The same house with a mini ductless split heat pump:
Mitsubishi MSZ-FE18NA with a maximum nominal input power of 2.4 kW (providing 8 kW of energy output) X $ 0.098 X 24 hours X 30 days = $ 169.34
The reason I like to use this example is that it is very simple and easy to calculate the maximum amount of power your unit will cost you per month, although these conditions will likely never happen. At these extremes, you can easily cut 30% of your home heating cost. Heat loss from the home will fluctuate with outside temperatures and so will the power input and output of your mini ductless split heat pump.