BTU Calculator (AC & Kutentha)
Kukula kwa mpweya wa mpweya kapena wotentha mu BTU kuchokera ku malo a nyumba, nyengo, dzuwa ndi kukhazikika.
Zithunzizi zimasintha monga momwe mumalemba.
Zachidule
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.
Mafunso ofunsidwa nthawi zambiri
Kodi BTU zingati ndiyenera pa mita imodzi ya m'lifupi?
Kwa kutulutsa, za 20 BTU pa ola limodzi pa mita imodzi yaying'ono ndi malo oyamba oyenera, choncho 300 sq ft yanyumba iyenera pafupifupi 6,000 BTU. Kutentha kumafunikira zambiri - kuchokera pa 25 BTU / ft. sq m'nyengo yozizira mpaka 60 m'chisanu.
Kodi dzuwa, anthu ndi makhitchini amasintha bwanji mnda?
Malo otentha kwambiri amawonjezera pafupifupi 10% ndipo mthunzi umodzi umachotsa 10%.Kawirikawiri, aliyense wokhalamo m'nyumbayo amawonjezera pafupifupi 600 BTU, ndipo khofi amawonjezera pafupifupi 4,000 BTU chifukwa chogwiritsa ntchito zida zotentha.
Kodi BTU kusinthidwa kuti tons kapena kilowatts?
Ton imodzi ya mpweya wotentha ndi 12,000 BTU pa ola, ndipo 1 kilowatt ndi pafupifupi 3,412 BTU / h. Kuphatikiza apo, 12,000 BTU ndi 1 ton kapena pafupifupi 3.5 kW ya kutentha.
Kodi kulemera kwa chitseko kumasintha BTU yomwe ndimafunikira?
Ndikofunika. Kuwerengera kwa mtengo kwasinthidwa motsutsana ndi standard 8 ft ceiling, kotero 10 ft ceiling imawonjezera zofunikira za pafupifupi 25% chifukwa pali mpweya wochuluka kwambiri kuti ukhale. Sankhani kukula kwa ceiling mu options zazikulu kuti muwerenge.
Kodi ndi koipa kugula AC yolimba kwambiri?
Yes. A oversized yunitsi amatentha mpweya mofulumira koma amatseka pambuyo kuti amachotsa chinyezi chokwanira, kuchoka m'nyumba yozizira ndi clammy ndi kuwononga mphamvu mwa short-kuyenda. Ndichifukwa chake chida ichi chimakula ku zowonjezerapo kuposa kungosankha yunitsi yoyamba.
Kodi kutentha kumafuna BTU zambiri kuposa kutulutsa kutentha kwa malo ofanana?
Kutentha kumayamba pafupi ndi 20 BTU / sq ft, pomwe kutentha kumachokera pa 25 BTU / sq ft m'nyengo yozizira mpaka 60 m'nyengo yozizira - choncho malo otentha anyengo amatha kufunikira nthawi zambiri zotentha.
Kodi ndingapeze malo a nyumba m'mita ya m'lifupi?
Yai. Sinthani mayunitsi a malo kuti azikhala mamita awiri ndipo calculator idzasintha m'nyumba (1 m² ≈ 10.76 sq ft) pambuyo pogwiritsa ntchito malamulo a BTU-pa-mita imodzi ya square, kuti muthe ntchito m'chigawo chilichonse chomwe chimagwiritsa ntchito ndondomeko yanu ya floor.
API — kugwiritsa ntchito izi calculator kuchokera code
Kuti mudziwe zambiri, pitani ku www.json.org/json.html. Kuti mudziwe zambiri, pitani ku www.json.org/json.html. Chomweko chilichonse chimene mumasiya chimagwiritsa ntchito mfundo yoyamba yomweyi yomwe tsambali limagwiritsa ntchito; mfundo yosadziwika ndi 400, siyiyenera kukhala zero yosadziwika. Onani zonse API docs →
Chithunzi
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);Zimenezi ndi zowerengera zokhudzana ndi malangizo amtundu uliwonse, si zokhudzana ndi ndalama, zamoyo kapena zokhudzana ndi ndalama.