🔥 Commercial Water Heater Size Calculator
Find the right tank capacity and recovery rate for your facility — restaurants, hotels, gyms, offices & more
| Facility Type | Unit of Measure | Gal / Unit / Peak Hr | Liters / Unit / Peak Hr | Typical Peak Hours |
|---|---|---|---|---|
| Restaurant | Per seat | 2.5 | 9.5 | Lunch & dinner (4–5 hrs) |
| Hotel / Motel | Per room | 15–20 | 57–76 | Morning (2–3 hrs) |
| Gym / Fitness | Per locker | 20 | 76 | Morning & evening (3 hrs) |
| Office Building | Per person | 0.5 | 1.9 | Mid-morning (2 hrs) |
| Laundromat | Per machine | 7 | 26.5 | All day (8–12 hrs) |
| School / University | Per student | 1 | 3.8 | Lunch & afternoon (3 hrs) |
| Hospital / Medical | Per bed | 20 | 76 | Morning (4 hrs) |
| Hair / Beauty Salon | Per station | 5 | 18.9 | Business hours (8 hrs) |
| Retail Store | Per employee | 1 | 3.8 | Business hours (6–8 hrs) |
| Temp Rise (°F) | Temp Rise (°C) | Required BTU / Gallon | Gas Heater Recovery (GPH) | Electric Recovery (GPH) |
|---|---|---|---|---|
| 30°F | 17°C | 250 BTU | ~240 GPH | ~80 GPH |
| 50°F | 28°C | 417 BTU | ~144 GPH | ~48 GPH |
| 65°F | 36°C | 542 BTU | ~110 GPH | ~37 GPH |
| 80°F | 44°C | 667 BTU | ~90 GPH | ~30 GPH |
| 100°F | 56°C | 834 BTU | ~72 GPH | ~24 GPH |
| Peak Hour Demand | Recommended Tank (gal) | Recommended Tank (L) | BTU/hr Input Needed | Suitable For |
|---|---|---|---|---|
| Up to 50 GPH | 50–75 gal | 189–284 L | 75,000 BTU | Small office, salon |
| 50–100 GPH | 100 gal | 378 L | 150,000 BTU | Med. restaurant, gym |
| 100–200 GPH | 150–200 gal | 568–757 L | 300,000 BTU | Hotel, large rest. |
| 200–400 GPH | 250–400 gal | 946–1,514 L | 500,000 BTU | Hospital, school |
| 400+ GPH | Multiple tanks / 500+ gal | 1,893+ L | 750,000+ BTU | Large hotel, laundry |
Choosing right commercial water heaters for business help to meet precise needs. Have many options for look, for instance those of A.O. Smith with models on gas, electric and tankless.
Businesses commonly require highly efficient devices, like used in laundromats. A.O. Smith bids also domestic and commercial tankless models, storage tanks, and hybrid heat pumps.
How to Choose a Water Heater for Your Business
Rheem provide whole series of light-duty and heavy-duty commercial water heaters. Its wholesale products have various tank types, also from stainless steel, polybutylene and glass-on-steel.
American Water Heaters are between the biggest makers in the country. It offers complete series of electric and gas water heaters for domestic and commercial use. Those devices intend to satisfy plumbing professionals.
Noritz is other brand designed for commercial durability, ideally for high demand setups. Although it has good quality, it can be too much for normal home. If you search tankless solutions, Rheem models considers between the best, while Rinnai are good second choice for businesses.
Seriously know, that using of domestic water heater in commercial place can void the warranty. Commercial applications imply continuous use. This style quickly exhausts domestic model more than you expect.
Because of that maybe needs commonly fix or entirely replace it. Tankless water heaters, or also called on-demand, are the most energy-efficient on the market. Because its gas heat exchanger only heats water when it needs.
They give almost endless hot water flow, during water arrive from source or fresh reservoir.
During choice of system, compare model numbers and their details to estimate advantages for certain use. If you do not know about costs and specs, solicit advice of expert. Many notice, that on-demand systems cost more upfront, but they spare money on a long-term basis and escape hot water absence.
Exist various heating systems, as solar, oil and electric, together with tank and tankless units. Find apt products with free shipping or in stores at plumbing sections.
