HVAC / runnable MCP tool
Run the A2L Line Set Calculator in your AI assistant
Through the free Intry MCP server, ChatGPT, Claude, or Cursor runs this exact calculator and hands back a verdict and the cited source, not a guess. Tool name: line_set.
Ask your assistant
Once Intry is connected, type a question like these. The assistant recognizes the job and calls the line_set tool, then answers with the number, the verdict, and the citation.
Inputs
| Field | Required | What it is |
|---|---|---|
| newRefrigerantId | yes | New refrigerant. |
| previousRefrigerantId | optional | Existing set's refrigerant (default none). |
| tons | yes | System tonnage (e.g. 3). |
| totalLengthFt | yes | Total line-set length in feet. |
| elbows | optional | Number of elbows (default 0). |
| verticalRiseFt | optional | Vertical rise in feet (default 0). |
| existingLiquid | optional | Existing liquid line OD, e.g. '3/8' (default n/a). |
| existingSuction | optional | Existing suction line OD, e.g. '7/8' (default n/a). |
| damaged | optional | Is the existing set damaged/kinked? Default false. |
Add Intry to Claude (free)
One paste and Claude can run this tool and every other Intry calculator. Free on every plan, works on your phone.
- Open Claude and go to Settings, then Connectors (works on the phone app too).
- Tap Add custom connector and paste the Intry link below.
- Tap Add. Done. Now just ask Claude any wire, load, conduit, or refrigerant question.
https://www.intrysys.com/api/mcpFree inside Claude, on every plan (including the free one) and on your phone. No login on our end, no API key.
Using ChatGPT, Cursor, or a dev tool? See the developer setup on the main page. The endpoint is https://www.intrysys.com/api/mcp.
The tool returns its governing citation with every call (for example the NEC 2023 section or the refrigerant pressure-temperature data). Numbers are computed by the same locked engine the interactive calculator uses, golden-verified in CI and gated on every deploy.