HVAC Energy Calculators — Home Renovation
Home energy upgrade payback: tankless water heater ROI, smart thermostat savings, ductless mini splits, attic fans, and whole-house fans. Payback depends on your local energy price and climate, so enter real utility rates rather than an average.
All HVAC Energy Calculators
Estimate attic fan installation costs including solar vs electric options.
Estimate ductless mini-split installation costs from zones, BTU, and installation complexity.
Estimate annual energy savings from installing a smart thermostat based on usage patterns.
Calculate the payback period and annual savings of switching to tankless water heating.
Estimate whole house fan installation costs from home size and fan CFM rating.
Estimate energy savings from installing window film/tinting based on sun exposure and climate.
About HVAC Energy Calculators
Home energy upgrade payback: tankless water heater ROI, smart thermostat savings, ductless mini splits, attic fans, and whole-house fans. Payback depends on your local energy price and climate, so enter real utility rates rather than an average.
Whether you need to solve a one-time problem or verify your own calculations, these free tools cover the most common hvac energy scenarios. All results are computed in your browser — no data is sent to any server.
What You Can Calculate
This section includes 6 tools: Attic Fan Cost Calculator, Ductless Mini Split Cost Calculator, Smart Thermostat Savings Calculator, Tankless Water Heater ROI Calculator, Whole-House Fan Cost Calculator (Install + Fan Size), Window Film Energy Savings Calculator. Each calculator is free to use with no signup required.