ROI: Heat-Pump Water Heater vs. Electric Water Heater
Am a to be homeowner of a “pretty good house” in Windsor County, Vermont (CL 6A). Am going for all electric house with ductless heat pump, and will be investing in a community based solar PV project. The house is slab-on-grade, two story building with two separate units (primary unit: 1500 sq. ft. , accessory unit 900 sq. ft).
Located in a heating dominated climate and absence of basement or crawl space, I am wondering what would be best for water heating? Should I choose a Heat-pump water heater(HPWH) or an electric heater and additional investment in a community based solar PV project?
Here are the points I am thinking about:
HPWH will rob heat in winter, the effective COP might be close to 1.5 when combined with cold climate heat pump heating. The issue with noise and additional installation cost is major concern. The benefit of some cooling in summer months will be an added bonus.
Electric heaters are costly to operate! (high occupancy building: 5 people in primary unit, 3 people in auxiliary unit); Should I invest for additional capacity in my local community solar PV project with net metering to offset electric water heating cost?
How to compare these two options based on Return-on-investment? Any tools or guides will be very helpful.
Note: I got a quote for SANCO2 split water heating system; the price and capacity does not work for my project.
GBA Detail Library
A collection of one thousand construction details organized by climate and house part