Home Energy

Estimate smart radiator valve savings, upfront cost, payback time, and 5-year net savings while checking basic system fit.

Compare storage heater energy costs, upgrade savings, added upfront cost, and simple payback using one rate or separate time periods.

Compare boiling-water tap and electric kettle lifetime costs, energy use, annual costs, and break-even daily water use.

Compare vented and conditioned attic project costs, yearly energy costs, lifetime totals, and payback over your planned ownership period.

Compare insulated and standard siding quotes, yearly energy savings, payback time, and net cost over your chosen years.

Compare fixed-price and price-cap heating oil quotes across low, base, and high market-price scenarios, including fees and overage gallons.

Compare exhaust-only and balanced ventilation costs, including installation, energy, maintenance, replacements, and catch-up year.

Compare bypass, fan-powered, and steam humidifier costs using your quotes, utility rates, water use, and maintenance estimates.

Compare WaterSense and standard RO lifetime cost, reject water, water savings, and estimated break-even time using your local rates.

Compare window heat pump and window AC plus space heater costs, including electricity, purchase costs, incentives, and replacements.