{ "x402Version": 2, "id": 32866, "slug": "32866", "resource": "https://x402-agent-api.onrender.com/api/v1/hvac-coil-load", "description": "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.", "type": "http", "serviceName": "Agent Utility Suite", "resourceType": "Market Data", "accepts": [ { "scheme": "exact", "network": "eip155:8453", "payTo": "0x6847231bD28E16A0A57c59793f6B8BD8CC0043aC", "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913", "amount": "2000", "amountUsd": 0.002, "maxTimeoutSeconds": 120 } ], "outputSchema": { "properties": { "example": { "type": "object" }, "type": { "type": "string" } }, "required": [ "type" ], "type": "object" }, "extensions": { "bazaar": { "info": { "input": { "body": { "airflow": 10000, "entering": { "dry_bulb": 80, "wet_bulb": 67 }, "leaving": { "dry_bulb": 55, "wet_bulb": 54 } }, "bodyType": "json", "method": "POST", "type": "http" }, "output": { "example": { "airflow": 10000, "condensate": 13.69, "elevation": 0, "entering": { "density": 0.07301, "dew_point": 60.32, "dry_bulb": 80, "enthalpy": 31.447, "grains": 78.18, "humidity_ratio": 0.011169, "relative_humidity": 51.1, "specific_volume": 13.8494, "vapor_pressure": 0.25926, "wet_bulb": 67 }, "leaving": { "density": 0.07667, "dew_point": 53.29, "dry_bulb": 55, "enthalpy": 22.569, "grains": 60.42, "humidity_ratio": 0.008631, "relative_humidity": 93.95, "specific_volume": 13.1549, "vapor_pressure": 0.20116, "wet_bulb": 54 }, "loads": { "latent": 122.833, "sensible": 270, "sensible_heat_ratio": 0.687, "tons": 32.736, "total": 392.833, "total_from_enthalpy": 399.538 }, "mixing": null, "mode": "cooling", "next_calls": [ { "arguments": { "airflow": 10000, "friction_rate": 0.08, "units": "IP" }, "price": "$0.002", "tool": "hvac_duct_size", "why": "What duct size carries 10000 CFM at 0.08 in. w.g. / 100 ft?" } ], "notes": [], "pressure": 14.696, "references": [ "ASHRAE Handbook—Fundamentals (2021), Ch. 1 Psychrometrics", "Standard-air load equations: Qs = 1.08·CFM·ΔT, Ql = 4840·CFM·ΔW, Qt = 4.5·CFM·Δh" ], "solved_for": "loads", "steps": [ { "calculation": "p = 14.696 × (1 − 6.8754×10⁻⁶ × Z)^5.2559 = 14.696 × (1 − 6.8754×10⁻⁶ × 0)^5.2559 = 14.6960 psia", "reference": "ASHRAE Handbook—Fundamentals (2021), Ch. 1 Psychrometrics, Eq. 3", "step": "Atmospheric pressure" }, { "calculation": "pws(67.00 °F wet bulb) = 0.32772 psia (ASHRAE Ch. 1 Eq. 6)", "reference": "ASHRAE Handbook—Fundamentals (2021), Ch. 1 Psychrometrics", "step": "Entering air state" }, { "calculation": "Ws* = 0.621945 × pws / (p − pws) = 0.014185 lb/lb (saturated at the wet bulb)", "reference": "ASHRAE Handbook—Fundamentals (2021), Ch. 1 Psychrometrics", "step": "Entering air state" } ], "unit_labels": { "airflow": "CFM", "area": "ft²", "condensate": "gal / h", "density": "lb / ft³", "elevation": "ft", "enthalpy": "BTU / lb dry air", "friction_rate": "in. w.g. / 100 ft", "grains": "gr / lb dry air", "humidity_ratio": "lb water / lb dry air", "length": "in", "load": "MBH (1,000 BTU/h)", "pressure": "psia", "relative_humidity": "%", "specific_volume": "ft³ / lb dry air", "temperature": "°F", "velocity": "FPM", "velocity_pressure": "in. w.g." }, "units": "IP" }, "type": "json" } }, "schema": { "$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 the other.", "minimum": 0, "type": "number" }, "units": { "default": "IP", "description": "\"IP\" (°F, CFM, in, BTU) or \"SI\" (°C, L/s, mm, kW). Default IP. Applies to inputs and results.", "enum": [ "IP", "SI" ], "type": "string" } }, "required": [ "airflow" ], "type": "object" }, "bodyType": { "enum": [ "json", "form-data", "text" ], "type": "string" }, "method": { "enum": [ "POST" ], "type": "string" }, "type": { "const": "http", "type": "string" } }, "required": [ "type", "method", "bodyType", "body" ], "type": "object" }, "output": { "properties": { "example": { "type": "object" }, "type": { "type": "string" } }, "required": [ "type" ], "type": "object" } }, "required": [ "input" ], "type": "object" } } }, "tags": [ "hvac", "coil-load", "engineering", "mechanical-engineering", "ashrae", "bazaar" ], "sourceHost": "x402-agent-api.onrender.com", "lastUpdated": "2026-10-07T14:45:38.246Z", "quality": { "calls30d": 2, "uniquePayers30d": 2, "lastCalledAt": "2026-10-07T14:45:37.923Z" }, "metadata": { "serviceName": "Agent Utility Suite", "extensions": { "bazaar": { "info": { "input": { "body": { "airflow": 10000, "entering": { "dry_bulb": 80, "wet_bulb": 67 }, "leaving": { "dry_bulb": 55, "wet_bulb": 54 } }, "bodyType": "json", "method": "POST", "type": "http" }, "output": { "example": { "airflow": 10000, "condensate": 13.69, "elevation": 0, "entering": { "density": 0.07301, "dew_point": 60.32, "dry_bulb": 80, "enthalpy": 31.447, "grains": 78.18, "humidity_ratio": 0.011169, "relative_humidity": 51.1, "specific_volume": 13.8494, "vapor_pressure": 0.25926, "wet_bulb": 67 }, "leaving": { "density": 0.07667, "dew_point": 53.29, "dry_bulb": 55, "enthalpy": 22.569, "grains": 60.42, "humidity_ratio": 0.008631, "relative_humidity": 93.95, "specific_volume": 13.1549, "vapor_pressure": 0.20116, "wet_bulb": 54 }, "loads": { "latent": 122.833, "sensible": 270, "sensible_heat_ratio": 0.687, "tons": 32.736, "total": 392.833, "total_from_enthalpy": 399.538 }, "mixing": null, "mode": "cooling", "next_calls": [ { "arguments": { "airflow": 10000, "friction_rate": 0.08, "units": "IP" }, "price": "$0.002", "tool": "hvac_duct_size", "why": "What duct size carries 10000 CFM at 0.08 in. w.g. / 100 ft?" } ], "notes": [], "pressure": 14.696, "references": [ "ASHRAE Handbook—Fundamentals (2021), Ch. 1 Psychrometrics", "Standard-air load equations: Qs = 1.08·CFM·ΔT, Ql = 4840·CFM·ΔW, Qt = 4.5·CFM·Δh" ], "solved_for": "loads", "steps": [ { "calculation": "p = 14.696 × (1 − 6.8754×10⁻⁶ × Z)^5.2559 = 14.696 × (1 − 6.8754×10⁻⁶ × 0)^5.2559 = 14.6960 psia", "reference": "ASHRAE Handbook—Fundamentals (2021), Ch. 1 Psychrometrics, Eq. 3", "step": "Atmospheric pressure" }, { "calculation": "pws(67.00 °F wet bulb) = 0.32772 psia (ASHRAE Ch. 1 Eq. 6)", "reference": "ASHRAE Handbook—Fundamentals (2021), Ch. 1 Psychrometrics", "step": "Entering air state" }, { "calculation": "Ws* = 0.621945 × pws / (p − pws) = 0.014185 lb/lb (saturated at the wet bulb)", "reference": "ASHRAE Handbook—Fundamentals (2021), Ch. 1 Psychrometrics", "step": "Entering air state" } ], "unit_labels": { "airflow": "CFM", "area": "ft²", "condensate": "gal / h", "density": "lb / ft³", "elevation": "ft", "enthalpy": "BTU / lb dry air", "friction_rate": "in. w.g. / 100 ft", "grains": "gr / lb dry air", "humidity_ratio": "lb water / lb dry air", "length": "in", "load": "MBH (1,000 BTU/h)", "pressure": "psia", "relative_humidity": "%", "specific_volume": "ft³ / lb dry air", "temperature": "°F", "velocity": "FPM", "velocity_pressure": "in. w.g." }, "units": "IP" }, "type": "json" } }, "schema": { "$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 the other.", "minimum": 0, "type": "number" }, "units": { "default": "IP", "description": "\"IP\" (°F, CFM, in, BTU) or \"SI\" (°C, L/s, mm, kW). Default IP. Applies to inputs and results.", "enum": [ "IP", "SI" ], "type": "string" } }, "required": [ "airflow" ], "type": "object" }, "bodyType": { "enum": [ "json", "form-data", "text" ], "type": "string" }, "method": { "enum": [ "POST" ], "type": "string" }, "type": { "const": "http", "type": "string" } }, "required": [ "type", "method", "bodyType", "body" ], "type": "object" }, "output": { "properties": { "example": { "type": "object" }, "type": { "type": "string" } }, "required": [ "type" ], "type": "object" } }, "required": [ "input" ], "type": "object" } } } }, "liveness": { "reliability": null }, "verified": false, "featured": false, "provider": { "host": "x402-agent-api.onrender.com", "manifest_name": "x402-agent-api.onrender.com", "source": "cdp-mirror", "source_manifest_url": "https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources", "submitted_at": "2026-10-14T01:15:01.050Z" }, "exampleResponse": { "example": {}, "type": "string" } }