9 Services from home-energy-calc.x402tookit.com

Calculates building heat loss in BTU/h and watts from surface areas and R-values plus optional air leakage, and estimates yearly energy from degree-days.

Calculates the total R-value and U-factor of a wall or roof assembly from material layers and thickness, with optional framing-fraction correction and heat flow computation.

Estimates a monthly electricity bill from kWh usage using block-tier rates, a fixed monthly service charge, and an optional tax/fee percentage.

Calculates EV charging time, electricity cost, and range added from battery size, charge levels, charger power or circuit specs, and price per kWh.

Sizes a rooftop solar system from annual kWh consumption and peak sun hours, returning system kW, panel count, annual output, savings, and simple payback period.

Totals a list of home appliances (by watts, hours/day, and quantity) into kWh and cost breakdowns per day, month, and year, with each appliance's share of total consumption.

Calculates water heater recovery rate (gallons per hour), tank heat-up time, and energy cost from fuel type, input power, efficiency, and temperature rise.

Calculates and ranks the cost per million BTU of delivered heat across resistance electric, heat pump, natural gas, propane, and heating oil systems based on user-provided fuel prices and efficiencies.

Calculates the recommended room air-conditioner BTU/h and tons from floor area using the ENERGY STAR chart, and optionally checks whether a given piece of equipment is correctly sized for a calculated load.