Math & Numbers

Thermal Comfort PMV-PPD (ISO 7730 / Fanger)

Compute the thermal comfort indices PMV (Predicted Mean Vote, −3 cold..+3 hot) and PPD (Predicted Percentage Dissatisfied, %) per ISO 7730 / ASHRAE 55, using the Fanger equations. Inputs: air temperature Ta, mean radiant temperature Tr, relative air velocity v_ar, relative humidity φ, metabolic rate M (met; 1 met = 58.2 W/m²), clothing insulation Icl (clo; 1 clo = 0.155 m²·K/W), and external work W (defaults to 0). The clothing surface temperature Tcl is solved iteratively. Returns a 7-level ASHRAE sensation label.

json· JSON resultOpen tool

Quick start

Call this tool from your code in three languages.

cURL

curl -X POST 'https://api.elysiatools.com/en/api/tools/thermal-comfort-pmv' \
  -H 'Content-Type: application/json' \
  -d '{"ta":22,"tr":22,"tempUnit":"°C","var":0.1,"rh":50,"met":1.2,"clo":1,"work":0,"decimalPlaces":3}'

API reference

Send a POST request with your inputs as JSON. File parameters require a separate upload first.

Endpoint

HTTP

POST https://api.elysiatools.com/en/api/tools/thermal-comfort-pmv

Parameters

Name	Type	Required	Description
ta	number	Yes	Dry-bulb air temperature Ta, in the selected Temperature Unit.
tr	number	Yes	Mean radiant temperature Tr, in the selected Temperature Unit.
tempUnit	select	No	—
var	number	Yes	Relative air velocity v_ar in m/s. Typical office 0.1 m/s. 0–3 m/s.
rh	number	Yes

MCP integration

Add this tool to your Model Context Protocol server so AI agents can list and call it.

Server configuration

Add this block to your MCP client configuration:

mcp.json

{
  "mcpServers": {
    "elysiatools-thermal-comfort-pmv": {
      "name": "thermal-comfort-pmv",
      "description": "Compute the thermal comfort indices PMV (Predicted Mean Vote, −3 cold..+3 hot) and PPD (Predicted Percentage Dissatisfied, %) per ISO 7730 / ASHRAE 55, using the Fanger equations. Inputs: air temperature Ta, mean radiant temperature Tr, relative air velocity v_ar, relative humidity φ, metabolic rate M (met; 1 met = 58.2 W/m²), clothing insulation Icl (clo; 1 clo = 0.155 m²·K/W), and external work W (defaults to 0). The clothing surface temperature Tcl is solved iteratively. Returns a 7-level ASHRAE sensation label.",
      "baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=thermal-comfort-pmv",
      "command": "",
      "args": [],
      "env": {},
      "isActive": true,
      "type": "sse"
    }
  }
}

List available tools

After connecting to the SSE endpoint, list the exposed tools:

tools/list

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/list"
}

Call this tool

Invoke the tool by its id, passing arguments built from its parameters:

tools/call

{
  "jsonrpc": "2.0",
  "id": 2,
  "method": "tools/call",
  "params": {
    "name": "thermal-comfort-pmv",
    "arguments": {
  "ta": 22,
  "tr": 22,
  "tempUnit": "°C",
  "var": 0.1,
  "rh": 50,
  "met": 1.2,
  "clo": 1,
  "work": 0,
  "decimalPlaces": 3
}
  }
}

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