HVAC & Energy Calculators
Free calculators for heating, cooling, insulation, solar energy, and home energy upgrades. Size equipment correctly, estimate installation costs, and understand long-term energy savings before you hire a contractor.
Explore related categories:
HVAC Sizing Calculator
Proper furnace and air conditioner sizing by home square footage, climate zone, and insulation level. Avoid oversizing errors.
Solar Panel Cost Calculator
Residential solar system costs — panels, inverter, installation, permits, and federal tax credit estimates. Battery backup included.
Insulation Calculator
R-value calculator for attic, walls, and basement. Estimate insulation material needs and long-term heating/cooling savings.
Water Heater Cost Calculator
Tank vs. tankless water heater costs — installation, operating cost, recovery time, and payback period by household size.
Generator Installation Cost Calculator
Whole-home standby generator costs — unit sizing, propane/natural gas connection, transfer switch, and installation labor.
EV Charger Installation Cost Calculator
Level 2 home EV charger installation — panel upgrade needs, conduit, circuit, permits, and labor by distance from panel.
Septic & Well Cost Calculator
Septic system installation and repair costs — drain field, tank, pump, well drilling, and water treatment system estimates.
Water Softener Cost Calculator
Water treatment and softening system costs — salt-free vs. ion-exchange softeners, installation, and annual regeneration costs.
Home Security Cost Calculator
Security system installation — cameras, sensors, monitoring, smart locks, and professional monitoring contract costs.
Electrical Wiring Cost Calculator
Electrical panel upgrade and rewiring costs — service size, circuits, conduit, GFCI/AFCI requirements, and labor by room.
Pool & Hot Tub Cost Calculator
Swimming pool and hot tub operating costs — heating, electricity, water, chemicals, and seasonal maintenance estimates.
HVAC & Energy Equipment in 2026
Energy equipment is a long-term investment — a correctly sized HVAC system lasts 15–20 years; a solar system 25–30 years. Oversizing wastes money upfront and reduces efficiency; undersizing leaves you uncomfortable and drives up energy bills.
The 2026 federal energy landscape: the Residential Clean Energy Credit (formerly ITC) covers 30% of solar installation costs through 2032, then steps down. Heat pump HVAC systems qualify for up to $2,000 in credits. Heat pump water heaters qualify for up to $2,000. EV charger installation qualifies for a 30% credit (capped at $1,000).
Before replacing HVAC equipment: get a Manual J heat load calculation (not a guess by the contractor), verify ductwork condition if central air, and consider a home energy audit — typically $200–$500 and often subsidized by utilities. The audit identifies the highest-value improvements and ensures you size equipment based on actual heat loss, not rule-of-thumb formulas.