Unit of Measure



N/A A. O. Smith®

Maximum Hydrostatic Working Pressure

N/A 150 psi

Thermal Efficiency

N/A 80 %

Approximate Capacity

N/A 74 gal280 L

Input Rating

N/A 75100 BTU/hr22 kW/hr


N/A Natural Gas

Manifold Pressure

N/A 4 inWc1.12 kPa

Power Cord Length

N/A 6 ft

Equipment Grade

N/A Commercial

Industry Standards

N/A ANSI Z-21.10.3 - CSA 4.3 ASHRAE/IESNA 90.1 ASME Certified CSA® Certified

Electrical Characteristics


N/A 120 V


N/A 60 Hz


N/A <5 A



Schematic Drawing for Conservationist® Ultra-Low NOx BLN-80 Commercial Gas Water Heaters

Dimension A

N/A 65-7/8 in167.22 cm

Dimension B

N/A 57-7/8 in145.23 cm

Dimension C

N/A 30-15/16 in78.58 cm

Dimension D

N/A 25-1/4 in64.14 cm

Dimension E

N/A 15-1/2 in38.6 cm

Dimension F

N/A 4 in10.2 cm

Dimension G

N/A 15-3/8 in40.0 cm

Dimension H

N/A 16 in40.6 cm

Dimension J

N/A 2-1/4 in5.71 cm

Dimension K

N/A 1 in. NPT

Dimension L

N/A 1/2 in. NPT

Dimension M

N/A 12-1/4 in31.1 cm

Maximum Recovery (ºF)

Recovery at 30 ºF Temperature Rise

N/A 243 gal/h

Recovery at 40 ºF Temperature Rise

N/A 182 gal/h

Recovery at 50 ºF Temperature Rise

N/A 145 gal/h

Recovery at 60 ºF Temperature Rise

N/A 122 gal/h

Recovery at 70 ºF Temperature Rise

N/A 104 gal/h

Recovery at 80 ºF Temperature Rise

N/A 91 gal/h

Recovery at 90 ºF Temperature Rise

N/A 81 gal/h

Recovery at 100 ºF Temperature Rise

N/A 73 gal/h

Recovery at 110 ºF Temperature Rise

N/A 66 gal/h

Recovery at 120 ºF Temperature Rise

N/A 60 gal/h

Recovery at 130 ºF Temperature Rise

N/A 56 gal/h

Recovery at 140 ºF Temperature Rise

N/A 52 gal/h

Maximum Recovery (ºC)

Recovery at 17 ºC Temperature Rise

N/A 920 L/h

Recovery at 23 ºC Temperature Rise

N/A 688 L/h

Recovery at 28 ºC Temperature Rise

N/A 549 L/h

Recovery at 33 ºC Temperature Rise

N/A 460 L/h

Recovery at 39 ºC Temperature Rise

N/A 392 L/h

Recovery at 44 ºC Temperature Rise

N/A 344 L/h

Recovery at 50 ºC Temperature Rise

N/A 306 L/h

Recovery at 56 ºC Temperature Rise

N/A 277 L/h

Recovery at 61 ºC Temperature Rise

N/A 251 L/h

Recovery at 67 ºC Temperature Rise

N/A 228 L/h

Recovery at 72 ºC Temperature Rise

N/A 213 L/h

Recovery at 78 ºC Temperature Rise

N/A 199 L/h

Testing and Certifications

Testing and Certifications

N/A CSA® Certified and ASME Rated T&P Relief Valve

Codes and Standards
  • Design-certified according to ANSI Z-21.10.3 - CSA® 4.3 standards governing storage-type water heaters
  • California Energy Commission
  • Meets the thermal efficiency and standby loss requirements of the U.S. Department of Energy and current edition of ASHRAE/IESNA 90.1
  • Design-certified by Underwriters Laboratories
  • Certified for use on combustible flooring
  • Complies with SCAQMD Rule 1146.2 and other Air Quality Management Districts with similar requirements of 14 ng/j or 20 ppm



  • Optional Leg Kit to Meet NSF Standard 5.
  • (Part #9006645005)



N/A The BLN-80 commercial gas water heater meets California Air Quality Management District Requirements for NOx emissions of 14 ng/j or 20 ppm. This model is equipped with a pre-wired, factory-mounted blower. This blower provides more efficient control of heat and helps ensure an adequate supply of make-up air. Prior to ignition, the control proves a working draft.

Factory-Installed Blower
  • Control proves draft prior to ignition.
  • No draft hood or barometric damper required.
  • Blower is factory-mounted with a 6-foot power cord: requires 120 V, 3 amp or less electrical system connection.
Intelli-Vent™ Gas Control
  • Equipped with nearly indestructible silicon nitride hot surface igniter.
  • Advanced electronics for precise control of water temperature.
  • Easy-to-understand system diagnostics.
Rated as Category I Appliance
  • Category I appliance: uses standard metal, single-wall or "B" type vent.
  • May be common vented with other Category I appliances.
  • Vent connects directly to blower outlet.
Fully Automatic Control System
  • Auto-reset gas shutoff device prevents excessive water temperature.
  • Adjustable thermostat with 120 ºF to 180 ºF range.
  • Gas pressure regulator.
Glass Lined Tank
  • Exclusive CoreGard™ anode rods with stainless steel core provides additional corrosion protection.
Handhole Cleanout
  • Allows easy access to tank interior for cleaning.



  • 3-Year Limited Tank Warranty.
  • 1-Year Limited Parts Warranty.