BTU Calculator (AC & heating)
Dimansyon yon klima oswa chofaj nan BTU soti nan zòn nan chanm, klima, solèy ak ocupation.
Rezilta yo mete ajou pandan w ap ekri.
Atik sa a
A BTU (British Thermal Unit) is a unit of heat, and air conditioners and heaters are rated by how many BTU per hour they can move. This calculator estimates the capacity a room actually needs so you neither undersize the unit (which then runs flat out and never keeps up) nor oversize it (which short-cycles, wastes energy and leaves the room clammy). For cooling it starts from the U.S. EPA rule of thumb of about 20 BTU/h per square foot, then adjusts for ceiling height, sun exposure, occupancy and heat-producing rooms. For heating it scales the floor area by a BTU-per-square-foot factor that rises with a colder climate.
The cooling adjustments are: scale by ceiling height relative to the standard 8 ft; subtract about 10% for a heavily shaded room or add 10% for a very sunny one; add roughly 600 BTU for each occupant beyond the first two; and add about 4,000 BTU for a kitchen, where appliances throw off heat. As a worked example, a 300 sq ft moderate-climate living room with standard ceilings, average sun and two people needs about 300 × 20 = 6,000 BTU/h — a typical window-unit size. Heating that same room in a cold climate uses a factor near 60 BTU/sq ft, or roughly 18,000 BTU/h.
The result is also converted to tons and kilowatts and rounded up to a sensible unit size, using 1 ton of cooling = 12,000 BTU/h and 1 kW ≈ 3,412 BTU/h. So a 6,000 BTU need is about half a ton or 1.76 kW. These are planning estimates: a proper HVAC load calculation (Manual J) also weighs insulation, window quality, air leakage and local climate data, so treat the number as a well-informed starting point for shopping.
Kesyon ki poze souvan
Ki kantite BTU mwen bezwen pou chak pye kare?
Pou refwadisman, sou 20 BTU pou chak èdtan pou chak pye kare se pwen depa a standard, se konsa yon chanm 300 sq ft bezwen sou 6,000 BTU.Chaje bezwen plis - soti nan sou 25 BTU / ft kare nan yon klima cho jiska 60 nan yon sèl frèt.
Ki jan solèy, moun ak kwizin chanje nimewo a?
Yon chanm ki gen anpil solèy ajoute 10% ak yon chanm ki gen anpil solèy retire 10%. Chak moun ki rete nan chanm lan ajoute 600 BTU. Yon kwizin ajoute 4000 BTU paske aparèy kay la bay chalè.
Kijan pou yo konvèti BTU a tonnes oswa kilowatts?
Yon tòn nan klima-kondisyone egal a 12,000 BTU pa èdtan, ak 1 kilowatt se sou 3,412 BTU / h. Se konsa, yon 12,000 BTU se yon sèl tonne oswa apeprè 3.5 kW nan refwadisman.
Èske wotè plafon an chanje BTU mwen bezwen?
Wi. Estimasyon an se an rapò ak yon plafon 8 pye, se konsa yon plafon 10 pye ogmante bezwen an pa 25% paske gen plis volim lè pou kondisyone. Konfigurer la hauteur plafon nan opsyon avanse pou kontwole li.
Èske li mal pou achte yon AC gwosè gwo?
Wi. Yon atik ki gen gwosè ki pi gran refwadi lè a byen vit men li sispann travay anvan li retire imidite ase, kite chanm lan fre ak mouye epi li gaspiye enèji pa kout-siklè. Se poutèt sa, atik sa a ka mezire selon kantite lajan an nan chalè ki bezwen an, san li pa bezwen chwazi atik ki pi gwo a.
Èske chofaj bezwen plis BTU pase refwadisman pou menm chanm lan?
Refwadisman kòmanse nan alantou 20 BTU / pye kare, pandan ke chofaj varye soti nan sou 25 BTU / pye kare nan yon klima cho a 60 nan yon sèl frèt - se konsa yon chanm klima frèt ka bezwen plizyè fwa kapasite chofaj.
Èske mwen ka antre nan zòn nan chanm nan mèt kare?
Wi. Chanje yonite zòn nan mèt kare e calculateur a pral konvèti anndan (1 m² ≈ 10.76 pye kare) anvan li aplike règleman BTU-pou-pi kare yo, pou ou ka travay nan nenpòt ki yonite plan ou itilize.
API — itilize sa a calculateur soti nan kòd
Apèl sa a calculateur kòm yon gratis JSON pwent-de-fini - pa gen okenn kle ki nesesè. Envoye valè jaden anba a kòm paramèt kesyonè oswa JSON. Anything you omit uses the same default this page is pre-filled with; an unknown parameter is a 400, never a silent zero. Li dokiman API a an antye →
Endpoint
GET https://calculator.free/api/v1/btu/curl
curl "https://calculator.free/api/v1/btu/?mode=cooling&units=sqft&area=300&climate=moderate"JavaScript fetch()
const r = await fetch(
"https://calculator.free/api/v1/btu/?" + new URLSearchParams({
"mode": "cooling",
"units": "sqft",
"area": "300",
"climate": "moderate"
}));
const data = await r.json();
console.log(data.results);Rezilta yo se estimasyon pou kòmandman jeneral sèlman, pa finansye, medikal oswa konsèy taks.