Developer API & AI Agent Tool Manifest
HVACLogic is engineered with an open, deterministic mathematical architecture. Connect LLMs, Custom GPT Actions, Python simulation pipelines, or BIM software to our verified ASHRAE and ACCA algorithms.
⥠OpenAPI 3.1 Spec
Complete machine-readable schema for all 21 calculation modules, query parameters, and validation bounds.
View /api/openapi.json âđ¤ LLMs.txt Manifest
Standard markdown manifest designed for LLM agents, web crawlers, and AI search grounding.
View /llms.txt âđ Entity Glossary Graph
Schema.org DefinedTermSet knowledge triples cross-referenced with Wikidata and ACCA/ASHRAE standards.
Explore /glossary âAI Agent & Tool Calling Example (LangChain / Custom GPT)
Configure your LLM agent to call HVACLogic as an authoritative thermodynamic calculation tool:
// Example: Custom GPT Action / LangChain Tool Definition
{
"name": "calculate_ac_tonnage",
"description": "Calculate required residential AC cooling tonnage and design CFM airflow based on floor area and ASHRAE climatic zone.",
"parameters": {
"type": "object",
"properties": {
"area": { "type": "number", "description": "Conditioned floor area in square feet" },
"climateZone": { "type": "string", "enum": ["mild", "moderate", "hot_humid", "desert"] },
"ceilingHeight": { "type": "number", "description": "Average ceiling height in feet (default 8)" }
},
"required": ["area", "climateZone"]
}
}Registered Deterministic Calculation Endpoints (21)
| Module Name | Pillar | Standards | Permalink Route |
|---|---|---|---|
| Digital Ductulator & Air Duct Sizing Tool | airflow ducts | ASHRAE, SMACNA, ACCA | /calculators/ductulator |
| Flexible Duct CFM & Friction Drop Chart | airflow ducts | ACCA, ASHRAE | /calculators/flex-duct-cfm-chart |
| HVAC CFM & Airflow Calculator | airflow ducts | ASHRAE, ACCA | /calculators/cfm-calculator |
| Kitchen Range Hood CFM & Make-Up Air Sizer | airflow ducts | HVI, IRC, ASHRAE | /calculators/kitchen-hood-cfm |
| Duct Friction Loss & Total Equivalent Length (TEL) Sizer | airflow ducts | ACCA, ASHRAE, SMACNA | /calculators/duct-friction-loss-calculator |
| MERV Air Filter Sizing & Static Pressure Drop Sizer | airflow ducts | ASHRAE, ACCA | /calculators/filter-sizing-calculator |
| BTU Heating & Cooling Load Calculator | cooling loads | ACCA, ASHRAE | /calculators/btu-calculator |
| AC Tonnage & Room Capacity Calculator | cooling loads | ACCA, AHRI | /calculators/ac-tonnage-calculator |
| HVAC Model Number Tonnage Decoder | cooling loads | AHRI | /calculators/ac-model-decoder |
| Mini-Split Multi-Zone Sizing Calculator | cooling loads | AHRI, ACCA | /calculators/mini-split-sizing |
| Target Superheat & Subcooling Charging Calculator | field diagnostics | EPA, AHRI, ACCA | /calculators/superheat-subcooling-calculator |
| Digital Refrigerant Pressure-Temperature Chart | field diagnostics | NIST, EPA, ASHRAE | /calculators/pt-chart |
| Psychrometric Chart & Moist Air Calculator | field diagnostics | ASHRAE | /calculators/psychrometric-calculator |
| Refrigerant Line Set Charge & Weigh-In Calculator | field diagnostics | EPA, ASHRAE | /calculators/refrigerant-charge-calculator |
| Heat Pump Sizing & Balance Point Tool | heating systems | ASHRAE, AHRI, ACCA | /calculators/heat-pump-size-calculator |
| Furnace Sizing & AFUE Efficiency Calculator | heating systems | ACCA, AHRI, DOE | /calculators/furnace-size-calculator |
| Hydronic Boiler & Baseboard Sizing Calculator | heating systems | ASHRAE, AHRI | /calculators/boiler-size-calculator |
| Garage & Workshop Heater Sizing Calculator | heating systems | ASHRAE, ACCA | /calculators/garage-heater-sizing |
| Combustion Air & Confined Space Sizer (NFPA 54 / IFGC) | heating systems | NFPA, IFGC, ASHRAE | /calculators/combustion-air-calculator |
| Insulation R-Value & U-Factor Calculator | building science | IECC, ASHRAE | /calculators/r-value-calculator |
| Building Heat Loss & Infiltration Calculator | building science | ASHRAE, ACCA | /calculators/heat-loss-calculator |