HVAC coil load calculator
HVAC coil load calculator: from airflow and entering/leaving air (any two properties each), the sensible, latent and total load, tons, SHR and condensate; or one state plus loads to solve the other. Outdoor/return air mixing and outdoor air % back-calculation. ASHRAE psychrometrics, elevation, IP or SI. Shows every step with the numbers. $0.002 USDC per call.
Answeringour last check, 2026-10-10
1 of 1checks answered this week
187 msmedian answer time
$0.002listed price per call
$0.002price 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
POST https://x402-agent-api.onrender.com/api/v1/hvac-coil-load
| Category | Everything else |
|---|---|
| Provider host | x402-agent-api.onrender.com |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 2 from 2 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-10-10 | valid payment request | 402 | $0.002 | 187 ms |
Example input (from the provider)
{
"body": {
"airflow": 10000,
"entering": {
"dry_bulb": 80,
"wet_bulb": 67
},
"leaving": {
"dry_bulb": 55,
"wet_bulb": 54
}
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"airflow": {
"description": "Total airflow through the coil: CFM (IP) or L/s (SI).",
"exclusiveMinimum": 0,
"type": "number"
},
"elevation": {
"default": 0,
"description": "Site elevation, ft (IP) or m (SI); sets the atmospheric pressure. Default 0 (sea level).",
"maximum": 30000,
"minimum": -1500,
"type": "number"
},
"entering": {
"additionalProperties": false,
"description": "Air entering the coil: exactly two of dry_bulb, wet_bulb, dew_point, relative_humidity (%), humidity_ratio (lb/lb or g/kg), enthalpy (BTU/lb or kJ/kg), grains (gr/lb), in `units`. With outdoor_air and return_air but no outdoor air amount, it is the mixed air and the outdoor air % is back-calculated.",
"properties": {
"dew_point": {
"type": "number"
},
"dry_bulb": {
"type": "number"
},
"enthalpy": {
"type": "number"
},
"grains": {
"minimum": 0,
"type": "number"
},
"humidity_ratio": {
"minimum": 0,
"type": "number"
},
"relative_humidity": {
"maximum": 100,
"minimum": 0,
"type": "number"
},
"wet_bulb": {
"type": "number"
}
},
"type": "object"
},
"latent_load": {
"description": "Coil latent load, MBH or kW (default 0 when only sensible_load is given).",
"minimum": 0,
"type": "number"
},
"leaving": {
"additionalProperties": false,
"description": "Air leaving the coil: two properties, like `entering`.",
"properties": {
"dew_point": {
"type": "number"
},
"dry_bulb": {
"type": "number"
},
"enthalpy": {
"type": "number"
},
"grains": {
"minimum": 0,
"type": "number"
},
"humidity_ratio": {
"minimum": 0,
"type": "number"
},
"relative_humidity": {
"maximum": 100,
"minimum": 0,
"type": "number"
},
"wet_bulb": {
"type": "number"
}
},
"type": "object"
},
"mode": {
"description": "When solving a state from loads: cooling (default) removes heat, heating adds it. Detected automatically when both states are given.",
"enum": [
"cooling",
"heating"
],
"type": "string"
},
"outdoor_air": {
"additionalProperties": false,
"description": "Outdoor air (two properties, like `entering`), mixed with return_air ahead of the coil.",
"properties": {
"dew_point": {
"type": "number"
},
"dry_bulb": {
"type": "number"
},
"enthalpy": {
"type": "number"
},
"grains": {
"minimum": 0,
"type": "number"
},
"humidity_ratio": {
"minimum": 0,
"type": "number"
},
"relative_humidity": {
"maximum": 100,
"minimum": 0,
"type": "number"
},
"wet_bulb": {
"type": "number"
}
},
"type": "object"
},
"outdoor_air_percent": {
"description": "Outdoor air share of the total airflow, %.",
"maximum": 100,
"minimum": 0,
"type": "number"
},
"outdoor_airflow": {
"description": "Outdoor airflow, CFM or L/s (instead of outdoor_air_percent).",
"minimum": 0,
"type": "number"
},
"return_air": {
"additionalProperties": false,
"description": "Return air (two properties, like `entering`).",
"properties": {
"dew_point": {
"type": "number"
},
"dry_bulb": {
"type": "number"
},
"enthalpy": {
"type": "number"
},
"grains": {
"minimum": 0,
"type": "number"
},
"humidity_ratio": {
"minimum": 0,
"type": "number"
},
"relative_humidity": {
"maximum": 100,
"minimum": 0,
"type": "number"
},
"wet_bulb": {
"type": "number"
}
},
"type": "object"
},
"sensible_load": {
"description": "Coil sensible load, MBH (IP) or kW (SI): with one state, solves