Reznor UWS-22/31 31,000 BTU - UWS - Hot Water Suspended Unit Heater
- Item #
- RZNR-UWS-22/31
- Mfr. part #
- UWS-22/31
- Max input31000
- Height17-1/16"
- Width23-3/4"
- BTU Category0-50,000 Btu/h
- BTU Input Minimum22000
| Brand | Reznor |
| Manufacturer part # | UWS-22/31 |
| BTU Category | 0-50,000 Btu/h |
| BTU Input Maximum | 31000 |
| BTU Input Minimum | 22000 |
| BTU Output | 31000 |
| Depth | 16-9/16" |
| Height | 17-1/16" |
| Nominal Air Flow (CFM) | 636 CFM |
| Recommended Service Clearance | 18" |
| Width | 23-3/4" |
The Reznor UWS-22/31 is a Model UWS hot water suspended unit heater rated at 31,000 BTU/h on high speed and 22,000 BTU/h on low speed. It is a commercial/industrial axial-fan hydronic unit heater: hot water from a boiler flows through its copper tube/aluminum fin coil, and the fan blows the heated air into the space. The water connections are on the back of the unit.
Key features
- Optimized for 140°F entering water temperature; works with high-efficiency boilers or hot water heat pumps
- Copper tube/aluminum fin coil for medium temperature water
- Multi-speed fan for tailored air delivery and quiet operation
- Vertical or horizontal air delivery
- Two-point (horizontal discharge) or four-point (downward discharge) suspension
- Painted galvanized-steel cabinet
Specifications
- Brand: Reznor
- Manufacturer part number: UWS-22/31
- Heating capacity: 31,000 BTU/h (high speed); 22,000 BTU/h (low speed)
- Nominal water flow: 2.9 GPM (high); 2.5 GPM (low); 1.6 GPM minimum
- Design water temperatures: 140°F entering / 120°F exiting; 40°F minimum; 250°F maximum operating
- Max operating pressure: 150 psi
- Air volume: 636 CFM (high); 417 CFM (low)
- Discharge air temperature rise (high speed): 47°F
- Sound level at 10 ft: 60 dBA (high); 57 dBA (low)
- Water connection: 1-1/4" male NPT
- Electrical: 115V/1-phase/60 Hz; 1.67 full load amps; 15 A max overcurrent protection
- Dimensions: 23-3/4" W x 17-1/16" H x 16-9/16" D
- Weight: 43 lb
- Clearances: 0" top, bottom and sides; 18" at the rear (fan motor)
- Certification: Listed by Intertek for the US and Canada, at elevations up to 10,000 ft
Installation note
Reznor specifies a minimum mounting height of 5 ft above the floor for this size, and recommends 6-14 ft in general. Do not install where the heater may be exposed to water spray, rain or dripping water. Hydronic and electrical connections must be made by a qualified installer following the Reznor installation manual and local codes.
Questions about fit or compatibility? Ask our team. We usually reply within one business day.
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