{"uid":"cap_M0vShO0N-ab5QmjG-NoKG","slug":"hvac-sensible-heat-cfm-calculator-d46f9dac","name":"HVAC Sensible Heat & CFM Calculator","description":"Sensible heat from airflow and temperature difference (1.08 x CFM x dT), or the CFM needed for a heat load.","url":"https://hvac-calc.x402tookit.com/sensible-heat?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","required":["deltaTF"],"properties":{"cfm":{"type":"number","description":"Airflow in CFM; send this or loadBtuh"},"deltaTF":{"type":"number","description":"Air temperature difference in degrees F (supply versus room), above 0"},"loadBtuh":{"type":"number","description":"Sensible load in BTU/h to get the CFM needed instead"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","properties":{"cfm":{"type":["null","number"]},"asOf":{"type":["null","string"]},"tons":{"type":["null","number"]},"source":{"type":["null","string"]},"deltaTF":{"type":["null","number"]},"reasons":{"type":["array","null"],"items":{"type":"string"}},"summary":{"type":["null","string"]},"verdict":{"type":["null","string"]},"degraded":{"type":["boolean","null"]},"kilowatts":{"type":["null","number"]},"disclaimer":{"type":["null","string"]},"notChecked":{"type":["array","null"],"items":{"type":"string"}},"sensibleBtuh":{"type":["null","number"]}}}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.02","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.02/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_KZR3xr7QCyXVuw_bQSZAl","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.02","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Calculates sensible heat load in BTU/h (using 1.08 × CFM × ΔT) or the required CFM airflow for a given heat load and temperature difference","exampleAgentPrompt":"What's the sensible heat load if I'm supplying 1200 CFM of air with a 20°F temperature difference from the room? And can you also convert the result to tons and kilowatts?","exampleUseCases":[{"title":"Size supply air for a server room","prompt":"I've got a server room with a 24,000 BTU/h sensible heat load and a 20°F delta T between supply and room air — how many CFM do I need to handle that load?"},{"title":"Verify duct sizing for an office retrofit","prompt":"We're supplying 800 CFM through a VAV box with a 15°F temperature difference. What's the sensible heat pickup in BTU/h, and how does that convert to tons of cooling?"},{"title":"Check design airflow for residential AC","prompt":"My residential AC system has a 3-ton sensible load and I'm planning a 20°F delta T between supply and return. How many CFM of airflow do I need to meet that load?"}],"resultDescription":"Returns the calculated sensible heat in BTU/h (or the required CFM if loadBtuh was provided), along with converted values in tons and kilowatts, the echoed delta T and CFM, a plain-language summary and verdict, and optional disclaimer or degraded-mode flags.","failureModes":["Missing required deltaTF parameter returns a validation error","Providing neither cfm nor loadBtuh (only deltaTF) results in an incomplete or error response","Zero or negative deltaTF values may be rejected per schema constraint (above 0 required)","Network or payment failure returns a 402 or 5xx error","Conflicting inputs (both cfm and loadBtuh provided) may produce unexpected behavior"],"whenToPreferThis":"Use this endpoint when you need a quick, reliable calculation of HVAC sensible heat load using the standard 1.08 × CFM × ΔT formula, or to back-calculate the required airflow from a known load. Prefer this over general-purpose calculators when you need structured output including tons and kilowatts conversions alongside the BTU/h result. It is especially useful in automated HVAC design workflows, equipment selection pipelines, or energy audit tools where per-call cost is acceptable for accurate, formula-based answers.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-29T13:08:16.344Z","isFirstParty":false,"canonicalSlug":"hvac-sensible-heat-cfm-calculator-d46f9dac"}