The 50-gallon, 76,000 BTU Force™ 90 light-duty commercial gas water heater is equipped with a fully submerged, spiral-shaped condensing heat exchanger. This design provides a much greater heat transfer surface than a standard straight flue tube, resulting in 90% thermal efficiency and higher hot water output than comparable 80% efficient water heaters. With 22" diameter, the 50-gallon Force™ 90 can be installed in less space than a 75-gallon unit and delivers greater recovery and lower operating costs.
Unit of Measure



N/A State®

Top/Side Inlet (NPT)

N/A 3/4 in

Top/Side Outlet (NPT)

N/A 3/4 in

Gas Inlet (NPT)

N/A 1/2 in

Approximate Capacity

N/A 50 U.S. gal189 L

Manifold Pressure

N/A 4 inWc0.99 kPa

Input Power

N/A 76000 BTU/hr22.25 kW·h

Maximum Temperature Setting

N/A 180 ºF


N/A Natural Gas


N/A Force™ 90



Maximum Hydrostatic Working Pressure (Compliance)

N/A 150 psi

Industry Standards

N/A ANSI Z-21.10.3 - CSA 4.3 ASHRAE/IESNA 90.1 UL® Listed



Schematic Drawing for Force™ 90 90% Efficient Power Vent Commercial Gas Water Heaters

Dimension A

N/A 70.62 in179.37 cm

Dimension B

N/A 68.20 in173.23 cm

Dimension C

N/A 51.90 in131.83 cm

Dimension D

N/A 20.90 in53.09 cm

Dimension E

N/A 9.15 in23.24 cm

Dimension F

N/A 12 in30.48 cm

Dimension G

N/A 22 in55.88 cm

Dimension H

N/A 8 in20.32 cm

Dimension J

N/A 15.81 in40.16 cm

Dimension K

N/A 26.92 in68.38 cm

Maximum Recovery

Recovery at 30 ºF Temperature Rise

N/A 275 gal/h

Recovery at 17 ºC Temperature Rise

N/A 1041 L/h

Recovery at 40 ºF Temperature Rise

N/A 206 gal/h

Recovery at 22 ºC Temperature Rise

N/A 780 L/h

Recovery at 50 ºF Temperature Rise

N/A 165 gal/h

Recovery at 28 ºC Temperature Rise

N/A 625 L/h

Recovery at 60 ºF Temperature Rise

N/A 138 gal/h

Recovery at 33 ºC Temperature Rise

N/A 522 L/h

Recovery at 70 ºF Temperature Rise

N/A 118 gal/h

Recovery at 39 ºC Temperature Rise

N/A 447 L/h

Recovery at 80 ºF Temperature Rise

N/A 104 gal/h

Recovery at 44 ºC Temperature Rise

N/A 394 L/h

Recovery at 90 ºF Temperature Rise

N/A 92 gal/h

Recovery at 50 ºC Temperature Rise

N/A 348 L/h

Recovery at 100 ºF Temperature Rise

N/A 83 gal/h

Recovery at 56 ºC Temperature Rise

N/A 314 L/h

Recovery at 110 ºF Temperature Rise

N/A 75 gal/h

Recovery at 61 ºC Temperature Rise

N/A 284 L/h

Recovery at 120 ºF Temperature Rise

N/A 69 gal/h

Recovery at 67 ºC Temperature Rise

N/A 261 L/h

Recovery at 130 ºF Temperature Rise

N/A 64 gal/h

Recovery at 72 ºC Temperature Rise

N/A 242 L/h

Recovery at 140 ºF Temperature Rise

N/A 59 gal/h

Recovery at 78 ºC Temperature Rise

N/A 223 L/h

Electrical Characteristics


N/A 120 V


N/A 60 Hz


N/A <5 A



N/A Power Vent Design for Installation Versatility
  • Modular blower, with 120 volt, 60 Hz electrical system (5 amps or less), 6-foot cord with standard 3-prong connector.
  • Can be vented vertically thru-the-roof or horizontally thru-the-wall.
  • Combined horizontal and vertical vent runs terminating through outside wall, using PVC, CPVC or ABS pipe as follows:
    • 2" pipe allows vent runs up to 20 equivalent feet.
    • 3" pipe allows vent runs up to 60 equivalent feet.
    • 4" pipe allows vent runs up to 120 equivalent feet.
  • Supplied with PVC pipe and elbows to connect heat exchanger outlet to blower, including condensate elbow and drain.
  • PVC Vent Attenuation Assembly (VAA) supplied to help ensure extra-quiet operation.
Side-Mounted Taps for Recirculating Systems
  • Hot and cold "side taps" allow Force™ 90 to be used for "combination" systems for water heating plus space heating, radiant floor heating or other applications requiring a recirculating hot water loop.
  • Plugs for recirculating taps are factory installed.
Intelli-Vent® (Intelli-Vent® is a registered trademark of the Emerson Electric Company) Gas Control with Silicon Nitride Hot Surface Ignitor
  • Premium-grade hot surface ignitor eliminates standing pilot.
  • Electronic circuitry provides superior system diagnostic capabilities plus extremely precise temperature control.
  • 180 ºF maximum temperature setting.
Glasslined Tank with Two Magnesium Anode Rods
  • Provides superior protection against corrosion.
  • Glass lining protects all "water side" tank surfaces plus inside of internal heat exchanger exposed to condensate.
Low NOx Green Choice® Burner
  • Reduces NOx emissions up to 33% and meets low NOx emission requirements of less than 40 ng/j.
Pexan™ Diffuser Dip Tube
  • Helps reduce lime and sediment buildup, maximize hot water output.
  • Pexan™ cross-link polymer withstands long-term exposure to temperatures up to 400 ºF.

Testing and Certifications

Testing and Certifications

N/A CSA® Certified and ASME Rated T&P Relief Valve
Maximum Hydrostatic Working Pressure: 150 psi Compliance
  • Design-certified by UL (Underwriters Laboratories) according to ANSI Z21.10.3-CSA® 4.3 standards governing storage-type water heaters
  • Meets the thermal efficiency and standby loss requirements of the U.S. Department of Energy and current edition of ASHRAE/IESNA 90.1



  • 3-Year Limited Tank Warranty.



N/A All models - Maximum Supply Pressure: 14 inches W.C. (3.48 kPa)

Minimum Supply Pressure Natural Gas: 5.0 inches W.C. (1.24 kPa)

Minimum Pressure must be maintained under both load and no load (Static and dynamic) conditions.

Recovery Capacities - U.S. Gallons/Hr. and Liters/Hr. at Temperature Rise Indicated

Recovery capacity based on 90% thermal efficiency

Install in accordance with local codes