# Services from home-energy-calc.x402tookit.com on Zero

> home-energy-calc.x402tookit.com serves 9 paid API services for AI agents, indexed by Zero. Each is callable per call with payment handled by Zero.

Canonical page: https://www.zero.xyz/host/home-energy-calc.x402tookit.com
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/home-energy-calc.x402tookit.com/health.json

## Services

- [Home Energy Calculators – Heat Loss](https://www.zero.xyz/c/home-energy-calculators-heat-loss-e118fdff/llms.txt): $0.02/call via x402. 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.
- [Home Energy Calculators – Insulation R-Value & U-Factor](https://www.zero.xyz/c/home-energy-calculators-insulation-r-value-u-factor-18883b96/llms.txt): $0.02/call via x402. 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.
- [Home Energy Calculators – Monthly Electricity Bill Estimator](https://www.zero.xyz/c/home-energy-calculators-monthly-electricity-bill-estimator-6b1670f9/llms.txt): $0.02/call via x402. Estimates a monthly electricity bill from kWh usage using block-tier rates, a fixed monthly service charge, and an optional tax/fee percentage.
- [Home Energy Calculators – EV Charging Time, Cost & Range](https://www.zero.xyz/c/home-energy-calculators-ev-charging-time-cost-range-dda09c8a/llms.txt): $0.02/call via x402. Calculates EV charging time, electricity cost, and range added from battery size, charge levels, charger power or circuit specs, and price per kWh.
- [Home Energy Calculators – Solar Sizing](https://www.zero.xyz/c/home-energy-calculators-solar-sizing-d2bc10a0/llms.txt): $0.02/call via x402. 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.
- [Home Energy Household Load Calculator](https://www.zero.xyz/c/home-energy-household-load-calculator-bb4ba46d/llms.txt): $0.02/call via x402. 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.
- [Home Energy Calculators – Water Heater Recovery & Cost](https://www.zero.xyz/c/home-energy-calculators-water-heater-recovery-cost-1a6e319e/llms.txt): $0.02/call via x402. Calculates water heater recovery rate (gallons per hour), tank heat-up time, and energy cost from fuel type, input power, efficiency, and temperature rise.
- [Home Energy Calculators – Heating Cost Comparison](https://www.zero.xyz/c/home-energy-calculators-heating-cost-comparison-4ef62072/llms.txt): $0.02/call via x402. 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.
- [Home Energy Calculators – HVAC Sizing (Room AC BTU)](https://www.zero.xyz/c/home-energy-calculators-hvac-sizing-room-ac-btu-25b071e0/llms.txt): $0.02/call via x402. 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.

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