Unit of Measure



N/A A. O. Smith®


N/A 74 gal


N/A Liquid Propane Gas Natural Gas

Input Power

N/A 80000 BTU/hr23.4 kW

Manifold Pressure

N/A For Liquid Propane Gas: 2.49 kPaFor Natural Gas: 1.12 kPaFor Liquid Propane Gas: 10 inWcFor Natural Gas: 4.5 inWc

Maximum Gas Supply Pressure

N/A 14 inWc3.48 kPa

Minimum Supply Pressure for Natural Gas

N/A 1.24 kPa5 in

Minimum Supply Pressure for Liquid Propane Gas

N/A 11 inWc2.74 kPa

Industry Standards

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



Schematic Drawing for Conservationist® Induced Draft Low NOx Gas Water Heaters

Dimension A

N/A 65-5/16 in1684 mm

Dimension B

N/A 58-1/2 in1486 mm

Dimension C

N/A 29-5/8 in753 mm

Dimension D

N/A 25-3/8 in645 mm

Dimension E

N/A 15 in381 mm

Dimension F

N/A 4 in102 mm

Dimension G

N/A 14 in356 mm

Dimension H

N/A 16 in406 mm

Dimension J

N/A 1-1/4 in32 mm

Dimension K

N/A 1 in25 mm

Dimension L

N/A 1/2 in13 mm

Dimension M

N/A 11-15/16 in303 mm

Maximum Recovery (ºF)

Recovery at 30 ºF Temperature Rise

N/A 258 gal/h

Recovery at 36 ºF Temperature Rise

N/A 215 gal/h

Recovery at 40 ºF Degree Rise

N/A 193 gal/h

Recovery at 50 ºF Temperature Rise

N/A 155 gal/h

Recovery at 54 ºF Temperature Rise

N/A 143 gal/h

Recovery at 60 ºF Temperature Rise

N/A 130 gal/h

Recovery at 70 ºF Temperature Rise

N/A 111 gal/h

Recovery at 72 ºF Temperature Rise

N/A 108 gal/h

Recovery at 80 ºF Temperature Rise

N/A 97 gal/h

Recovery at 90 ºF Temperature Rise

N/A 86 gal/h

Recovery at 100 ºF Temperature Rise

N/A 77 gal/h

Recovery at 108 ºF Temperature Rise

N/A 71 gal/h

Recovery at 110 ºF Temperature Rise

N/A 70 gal/h

Recovery at 120 ºF Temperature Rise

N/A 65 gal/h

Recovery at 126 ºF Temperature Rise

N/A 62 gal/h

Recovery at 130 ºF Temperature Rise

N/A 60 gal/h

Recovery at 140 ºF Temperature Rise

N/A 55 gal/h

Maximum Recovery (ºC)

Recovery at 17 ºC Temperature Rise

N/A 973 L/h

Recovery at 20 ºC Temperature Rise

N/A 814 L/h

Recovery at 23 ºC Temperature Rise

N/A 731 L/h

Recovery at 28 ºC Temperature Rise

N/A 585 L/h

Recovery at 30 ºC Temperature Rise

N/A 541 L/h

Recovery at 33 ºC Temperature Rise

N/A 490 L/h

Recovery at 39 ºC Temperature Rise

N/A 419 L/h

Recovery at 40 ºC Temperature Rise

N/A 407 L/h

Recovery at 44 ºC Temperature Rise

N/A 368 L/h

Recovery at 50 ºC Temperature Rise

N/A 324 L/h

Recovery at 56 ºC Temperature Rise

N/A 293 L/h

Recovery at 60 ºC Temperature Rise

N/A 269 L/h

Recovery at 61 ºC Temperature Rise

N/A 264 L/h

Recovery at 67 ºC Temperature Rise

N/A 245 L/h

Recovery at 70 ºC Temperature Rise

N/A 233 L/h

Recovery at 72 ºC Temperature Rise

N/A 225 L/h

Recovery at 78 ºC Temperature Rise

N/A 209 L/h

Electrical Characteristics


N/A 120 V


N/A 60 Hz


N/A <5 A



N/A The BTN-80 and BTN-100 are equipped with a factory-mounted blower that is pre-wired. This blower produces a pre-ignition draft of make-up air prior to burner ignition and 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 more 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
  • Can be commonly 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 to 180 ºF range
  • Gas pressure regulator
Factory Equipped With Dual Burners

Glass Lined Tank
  • Exclusive CoreGard™ anode rods with stainless steel core provide additional corrosion protection
Handhole Cleanout
  • Allows easy access to tank interior for cleaning
Conservationist® Btn Options
Optional Leg Kit To Meet Nsf Standard 5 (Part # 9006645005 BTN 80 & 100)

Intelli-Vent™ is a registered trademark of Emerson Electric Company.



N/A Conservationist® Btn Options
Optional Leg Kit to Meet NSF Standard 5 (Part # 9006645005 BTN 80 & 100)

Intelli-Vent™ is a registered trademark of Emerson Electric Company.

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 Z21.10.3-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 Texas Low Nox and Air Quality Management Districts with requirements of less than 40 ng/j



  • 3-Year Limited Tank Warranty.



N/A Note for Recovery:
Recovery capacity based on 80% thermal efficiency.

Note for Gas and Electrical Characteristics:
Minimum pressures must be maintained under both load and no load (static and dynamic) conditions.