BTU Calculator (AC & Heating)
Ubungakanani besixhobo somoya okanye isifudumezi se-BTU esivela kwigumbi, iimeko zemozulu, ulanga kunye nokusetyenziswa.
Iinketho ze projekti
Malunga nale Calculator
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.
Imibuzo ebuza rhoqo
Ndifuna i-BTU ezili-100 ngenyawo ngalinye?
Ukufudumeza, malunga ne-20 BTU ngeyure ngenyawo ngalinye le-square yindawo eqhelekileyo yokuqalisa, ngoko ke igumbi le-300 sq ft lifuna malunga ne-6,000 BTU. Ukufudumeza kufuna okuninzi - ukusuka malunga ne-25 BTU/sq ft kwimozulu eshushu ukuya kwi-60 kwimozulu ebandayo.
Ukukhanya, abantu kunye nekhitshi zitshintsha njani inani?
Igumbi elikhanyayo kakhulu lidibanisa malunga ne-10% kwaye elinye elikhanyayo lisusa i-10%. Abahlali bonke abangaphezulu kwesibini badibanisa malunga ne-600 BTU, kwaye ikhitshi lidibanisa malunga ne-4,000 BTU ngenxa yokuba izixhobo zikhupha ubushushu.
I-BTU iguqula njani kwitoni okanye kwikilowatt?
Itoni enye yomoya opholileyo ilingana ne-12,000 BTU ngeyure, ne-1 kilowatt imalunga ne-3,412 BTU/h. Ngoko ke i-12,000 BTU iyunithi yitoni enye okanye malunga ne-3.5 kW yokupholisa.
Ingaba ubude befestile butshintsha i-BTU endifunayo?
Ewe. Ubalo lulinganiselwe kumgangatho oqhelekileyo we-8 ft, ngoko ke i-10 ft inyusa imfuneko malunga ne-25% kuba kukho ubukhulu bomoya ongaphezulu okufunekayo. Misela ubude be-ceiling kwizinto ezikhethwayo eziphambili ukuze uthathe inxaxheba kuyo.
Ingaba kunzima ukuthenga iyunithi ye-AC encinci kakhulu?
Ewe. Iyunithi encinci kakhulu ipholile umoya ngokukhawuleza kodwa ivala phambi kokuba isuse ubushushu obuninzi, ishiya igumbi libanda kwaye libanda kwaye lilahle amandla ngokujikeleza okufutshane. Le nto ibangela ukuba le sixhobo siyigcinele umthwalo kunokuba sikhethe kuphela iyunithi enkulu.
Ingaba ukufudumeza kudinga i-BTU engaphezulu kunekufudumeza kwigumbi elifanayo?
Ukulungiswa kuqala kufutshane ne-20 BTU/sq ft, ngelixa ukufudumeza kuqala ku-25 BTU/sq ft kwimozulu eshushu ukuya kwi-60 kwimozulu ebandayo - ngoko ke igumbi lemozulu ebandayo lingafuna amaxesha amaninzi obushushu obunokulungiswa.
Ndingafaka indawo yegumbi ngeemitha ezisikwere?
Ewe. Tshintsha iyunithi yendawo ibe yimitha esiqwenga kwaye i-calculator iguqule ngaphakathi (1 m² ≈ 10.76 sq ft) phambi kokuba usebenzise iBTU-kwi-square-foot rules, ukuze usebenze kwiyunithi esiphi na esetyenziswa ngumzobo wakho wendawo yokuhlala.
API — sebenzisa le calculator ukusuka kwikhowudi
Nceda le khadi lemali njengendawo esemva ye-JSON ekhululekileyo - akukho qhosha lifunekayo. Thumela amaxabiso endawo ezantsi njengeparameter yombuzo okanye i-JSON. Nantoni na oyenzayo isebenzisa okungagqibekanga okufanayo eli phepha ligqityiwe ngaphambili; iparameter engaziwayo yi 400, ayikho i zero ekhululekileyo. Funda i-API epheleleyo →
Incopho yesiphelo
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);Results are estimates for general guidance only, not financial, medical or tax advice.