I am trying to determine power usage from a constant pressure pump and geothermal heat pump. I need to know typical cycle times. How much time will a single stage heat pump run in an hour to heat a 1300 sq ft home in the Northeast during winter. I plan to install a 4 ton and have 3 zones. I imagine a 2 stage heat pump would run all the time. It doesnt seem like a 2 stage unit makes sense for an open loop system, where it would be drawing power 24/7. Thank you
You can look up the Heating Degree Days for your area and take a guestimate. But we have no idea on cycle run time. Too many specifics required. Your off on you 2 stage assumptions. It sounds like you're letting a well pump dictate the heat pump selection. That's backwards.
"How much time will a single stage heat pump run in an hour to heat a 1300 sq ft home in the Northeast during winter. I plan to install a 4 ton and have 3 zones." That's like asking how many angels will fit on the head of a pin. On first blush 4 tons sounds extremely high for a 1300 SF home anywhere south of the arctic circle. That said, the most important first step is an accurate "Manual J" compliant heating (and cooling) load calculation for the home. Furthermore, regardless of water pumping energy considerations it would be foolish to combine a single stage heat pump with a 3 zone duct system. If just one zone is calling, such as, let's say the master bedroom with maybe 400-600 CFM register capacity is the only zone calling. A 4 ton heat pump will need to flow 1400+ CFM of air. Where will 1400 CFM go when it hits only 400-600 CFM of available duct capacity? It'll try to blow the registers off the walls / ceilings / floors and part the hair of anyone in the subject zone. Get the load right. Don't zone a single stage system. Don't let the pumping tail walk the HVAC dog.
I have a 2 story farm house. The insulation is decent. I calculated 46,000 btu in my manual j calculation. I am in Northern Maine. Its alot like the North Pole haha. I looked at the grundfos sqe constant pressure system. My well is 80' deep. The sales rep thought it would use 1600 watts to pump 12 gpm. I pay 16cents per kwh. The geo cool heat pump I want says power supply is 3.88kw. Im using this data to estimate the electric usage/ cost and its really high if the heat pump will run all the time. Am I mistaken? I would rather have a 2 stage system. I appreciate your input.
