Heat loss of a building in BTU/h and watts from surface areas and R-values plus
Heat loss of a building in BTU/h and watts from surface areas and R-values plus air leakage, and yearly energy from degree-days.
Answers HTTP 429 without x402 payment termsour last check, 2026-10-21
0 of 1checks answered this week
n/amedian answer time
$0.02listed price per call
n/aprice it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
GET https://home-energy-calc.x402tookit.com/heat-loss
| Category | Everything else |
|---|---|
| Provider host | home-energy-calc.x402tookit.com |
| Networks | eip155:137, eip155:42161, eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp |
| Payment schemes | exact |
| Self-reported calls, 30 days | 1 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-10-21 | no x402 terms | 429 | 819 ms |
Example input (from the provider)
{
"method": "GET",
"queryParams": {
"airChangesPerHour": 0.5,
"heatingDegreeDaysF": 5000,
"indoorF": 70,
"outdoorF": 30,
"surfaces": "walls:1000:13; windows:150:3; roof:1000:38; floor:1000:19",
"volumeCuFt": 20000
},
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"airChangesPerHour": {
"description": "Air changes per hour, 0.05 to 5 (a tight house is about 0.2 to 0.5)",
"type": "number"
},
"heatingDegreeDaysF": {
"description": "Heating degree-days (base 65 F) per year, for annual energy",
"type": "number"
},
"indoorF": {
"description": "Indoor temperature in F, 40 to 90",
"type": "number"
},
"outdoorF": {
"description": "Design outdoor temperature in F, -60 to 130",
"type": "number"
},
"surfaces": {
"description": "Lines name:areaSqFt:Rvalue separated by semicolons, for example 'walls:1000:13; windows:150:3; roof:1000:38'",
"type": "string"
},
"volumeCuFt": {
"description": "Heated volume in cubic feet, for air leakage (with airChangesPerHour)",
"type": "number"
}
},
"required": [
"surfaces",
"indoorF",
"outdoorF"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"annualHeatNeedKwh": {
"type": [
"null",
"number"
]
},
"annualHeatNeedMMBtu": {
"type": [
"null",
"number"
]
},
"annualHeatNeedTherms": {
"type": [
"null",
"number"
]
},
"asOf": {
"type": [
"null",
"string"
]
},
"conductionBtuPerHour": {
"type": [
"null",
"number"
]
},
"degraded": {
"type": [
"boolean",
"null"
]
},
"deltaTF": {
"type": [
"null",
"number"
]
},
"disclaimer": {
"type": [
"null",
"string"
]
},
"infiltrationBtuPerHour": {
"type": [
"null",
"number"
]
},
"infiltrationCfm": {
"type": [
"null",
"number"
]
},
"infiltrationSharePercent": {
"type": [
"null",
"number"
]
},
"notChecked": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"reasons": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"source": {
"type": [
"null",
"string"
]
},
"summary": {
"type": [
"null",
"string"
]
},
"surfaces": {
"items": {
"properties": {
"areaSqFt": {
"type": [
"null",
"number"
]
},
"btuPerHour": {
"type": [
"null",
"number"
]
},
"name": {
"type": [
"null",
"string"
]
},
"rValue": {
"type": [
"null",
"number"
]
},
"sharePercent": {
"type": [
"null",
"number"
]
},
"uValue": {
"type": [
"null",
"number"
]
},
"ua": {
"type": [
"null",
"number"
]
}
},
"type": "object"
},
"type": [
"array",
"null"
]
},
"totalBtuPerHour": {
"type": [
"null",
"number"
]
},
"totalKw": {
"type": [
"null",
"number"
]
},
"totalTons": {
"type": [
"null",
"number"
]
},
"totalUaBtuPerHourF": {
"type": [
"null",
"number"
]
},
"totalWatts": {
"type": [
"null",
"number"