This form extends a little on the simple calculations done on heat savings without looking at daily temperatures. It is meant to be used to provide information enough to make buying decisions, but can also be used to try out alternative choices. The form basically only needs two values in order to do meaningful calculations (where you live and how much heat the house needs), but then the basics in the simpler calculations are extended to:
- Use outside daily temperatures to decide if additional heating will be needed
- Use outside daily temperatures to decide utilised COP for an Air-To-Water pump
- Use the house's energy need curve based on outside temperatures to decide needed heating energy
- Use the Air-To-Water input power and COP to determine if additional heating is needed, and then include that in the cost
- Use the Geothermal maximum Power to determine if additional heating is needed, and then include that in the cost
It delivers cost saving payback times utilising comparisons between the alternatives. The shown alternatives are
- Using an eletric heater only
- Using an Air-To-Water heat pump
- Using a geothermal heat pump, compared to an Air-To-Water pump
- Using the heat pumps with or without the production of hot water
The way the calculations are done are described here. An important assumption for all calculations is that the radiators are large enough to deliver the needed heating without needing water temperatures above the heat pumps forward water temperature limits.
The below input data is to define the outside temperatures to be used, some calculations are then provided to help understand how they affect the results.
- After selecting from which area to take the outside temperatures, outside temperatures and coming calculations will be based on that selection as soon as any of the below buttons are pressed
- The columns shown in the temperature table is described here