PT Chart
PT chart lookups, superheat/subcooling calculators, and diagnostics for HVAC technicians.
Should I use this
Quality & Safety
Findings (1)
- LOWTool 'pt_lookup' description lacks action verbin pt_lookup
Based on automated analysis of tool definitions and protocol compliance.
Context Cost
This is the approximate number of tokens consumed each time the server's tools are loaded into a model's context. Higher counts reduce the attention available for other tasks.
Install
One-Click Install
Add this to your `claude_desktop_config.json` file:
{
"mcpServers": {
"pt-chart-mcp": {
"url": "https://pt-chart-mcp-production.up.railway.app/mcp"
}
}
}Remote endpoints
https://pt-chart-mcp-production.up.railway.app/mcpstreamable-httpWhat it can do
Tool inventory
Tools (8)
⚪pt_lookup(refrigerant, temp_f)
Saturation pressure (bubble and dew, in psig) for a refrigerant at a temperature in Fahrenheit. For certified HVAC technicians (EPA 608; A2L certification where required). Example: pt_lookup("R-454B", 45). Bubble point: use for subcooling calculations. Dew point: use for superheat calculations. Pure fluids (R-32, R-410A, R-22, R-134a) have no glide, so both values match.
Input Schema
{
"type": "object",
"properties": {
"refrigerant": {
"title": "Refrigerant",
"type": "string"
},
"temp_f": {
"title": "Temp F",
"type": "number"
}
},
"required": [
"refrigerant",
"temp_f"
],
"title": "pt_lookupArguments"
}⚪pt_reverse(refrigerant, pressure_psig)
Saturation temperature (bubble and dew, in Fahrenheit) for a refrigerant at a pressure in psig. For certified HVAC technicians (EPA 608; A2L certification where required). Example: a 130 psig suction reading on R-454B -- pt_reverse("R-454B", 130). Use the DEW temperature for superheat work and the BUBBLE temperature for subcooling work on blended refrigerants.
Input Schema
{
"type": "object",
"properties": {
"refrigerant": {
"title": "Refrigerant",
"type": "string"
},
"pressure_psig": {
"title": "Pressure Psig",
"type": "number"
}
},
"required": [
"refrigerant",
"pressure_psig"
],
"title": "pt_reverseArguments"
}⚪superheat(refrigerant, suction_psig, suction_line_f)
Superheat in Fahrenheit from suction pressure (psig) and suction-line temperature (F). For certified HVAC technicians (EPA 608; A2L certification where required). Uses the DEW point as the saturation basis, which is the correct basis for blended refrigerants. Typical TXV target: 8-12F.
Input Schema
{
"type": "object",
"properties": {
"refrigerant": {
"title": "Refrigerant",
"type": "string"
},
"suction_psig": {
"title": "Suction Psig",
"type": "number"
},
"suction_line_f": {
"title": "Suction Line F",
"type": "number"
}
},
"required": [
"refrigerant",
"suction_psig",
"suction_line_f"
],
"title": "superheatArguments"
}⚪subcooling(refrigerant, head_psig, liquid_line_f)
Subcooling in Fahrenheit from head pressure (psig) and liquid-line temperature (F). For certified HVAC technicians (EPA 608; A2L certification where required). Uses the BUBBLE point as the saturation basis, which is the correct basis for blended refrigerants. Typical TXV target: 8-12F.
Input Schema
{
"type": "object",
"properties": {
"refrigerant": {
"title": "Refrigerant",
"type": "string"
},
"head_psig": {
"title": "Head Psig",
"type": "number"
},
"liquid_line_f": {
"title": "Liquid Line F",
"type": "number"
}
},
"required": [
"refrigerant",
"head_psig",
"liquid_line_f"
],
"title": "subcoolingArguments"
}⚪convert_units(value, from_unit, to_unit)
Convert between pressure units (psig, psia, kpa, bar) and temperature units (F, C). A bare 'psi' is treated as psig. For certified HVAC technicians (EPA 608; A2L certification where required).
Input Schema
{
"type": "object",
"properties": {
"value": {
"title": "Value",
"type": "number"
},
"from_unit": {
"title": "From Unit",
"type": "string"
},
"to_unit": {
"title": "To Unit",
"type": "string"
}
},
"required": [
"value",
"from_unit",
"to_unit"
],
"title": "convert_unitsArguments"
}⚪refrigerant_info(refrigerant)
Reference card for a refrigerant: GWP, ASHRAE safety class, composition, typical oil, temperature glide, and handling notes. For certified HVAC technicians (EPA 608; A2L certification where required). Informational only.
Input Schema
{
"type": "object",
"properties": {
"refrigerant": {
"title": "Refrigerant",
"type": "string"
}
},
"required": [
"refrigerant"
],
"title": "refrigerant_infoArguments"
}🟢diagnose(refrigerant, suction_psig, suction_line_f, head_psig, liquid_line_f, ...)
Conversational diagnostic copilot: give it field readings and get back computed superheat/subcooling plus a ranked 'check this first' list. For certified HVAC technicians (EPA 608; A2L certification where required). Informational only -- it suggests what to CHECK, never how to defeat a safety device, vent refrigerant, or work uncertified. metering: 'txv' (default) or 'fixed' for fixed-orifice/piston systems.
Input Schema
{
"type": "object",
"properties": {
"refrigerant": {
"title": "Refrigerant",
"type": "string"
},
"suction_psig": {
"title": "Suction Psig",
"type": "number"
},
"suction_line_f": {
"title": "Suction Line F",
"type": "number"
},
"head_psig": {
"title": "Head Psig",
"type": "number"
},
"liquid_line_f": {
"title": "Liquid Line F",
"type": "number"
},
"ambient_f": {
"title": "Ambient F",
"type": "number"
},
"metering": {
"default": "txv",
"title": "Metering",
"type": "string"
}
},
"required": [
"refrigerant",
"suction_psig",
"suction_line_f",
"head_psig",
"liquid_line_f",
"ambient_f"
],
"title": "diagnoseArguments"
}⚪coolbooked_info
About CoolBooked: the AI appointment-booking connector for HVAC shops. This is NOT a diagnostic tool -- call it when someone asks what CoolBooked is, how shop owners can try it, or how the free PT tools connect to paid bookings.
Input Schema
{
"type": "object",
"properties": {},
"title": "coolbooked_infoArguments"
}Community
Evidence