A. O. Smith GAHH-50 User Manual

Residential Gas Water Heaters

HIGH EFFICIENCY ATMOSPHERIC GAS WATER HEATER

PRESSURIZED COMBUSTION SYSTEM

Exclusive and patented pressurized combustion system, with an advanced air
intake blower, delivers superior efficiency. Much like a turbocharger, the blower
distributes an optimum air-to-gas mixture pushing exhaust gases through the
highly restrictive flue baffle. The end result is the most efficient atmospheric gas
product on the market with a .70 Energy Factor (EF).

INSTALLATION FRIENDLY

■ Allows for easy replacement of standard atmospheric vent heaters

■ Easily connects to existing B-vent

FAN-ASSISTED, CATEGORY 1 APPLIANCE

24V ELECTRONIC CONTROL

■ Tighter differential for more consistent hot water delivery

ELECTRONIC IGNITION

■ The durable hot surface ignitor eliminates pilot relight issues (no standing pilot)

LCD USER INTERFACE

■ Easy-to-read, eye level display. Simple temperature settings and adjustments

■ Service diagnostics are in plain text

POWERED ANODE ROD

■ Non-sacrificial anode does not deplete over time

■ Provides exceptional protection in all water conditions

ENERGY STAR® QUALIFIED

DURABLE TAMPER-RESISTANT BRASS DRAIN VALVE

DYNACLEAN™ DIFFUSER DIP TUBE

■ Helps reduce lime and sediment buildup, maximizes hot water output

■ Made from long-lasting PEX cross-linked polymer

CSA CERTIFIED AND ASME RATED T&P RELIEF VALVE

CODES AND STANDARDS

■ These models meets the requirements of the BC Energy Efficiency Act

6-YEAR LIMITED TANK AND PARTS WARRANTY

For complete information, consult written warranty or contact
A. O. Smith Water Products Company.

SERIES 100

May 2013

CANRG45000

Page 1 of 2

Residential Gas Water Heaters

D

FRONT VIEW

1/2”

HIGH EFFICIENCY

FIRST

MODEL

GAHH 40 70 40 .70 40,000 43 2 61-3/4 58 20 13-1/4 8 51-1/2 23-1/4 25 3 or 4 157 √

GAHH 50 81 50 .70 40,000 43 2 60-5/8 57-1/8 22 13-1/4 8 50-1/2 25-1/4 27 3 or 4 171 √

All dimension in inches.
Recovery capacity based on actual performance tests.
Water Connections – 3/4” on all models.
Not available for LP gas (Propane).
Certified for installations up to 5500 ft. elevations.
Maximum hydrostatic working pressure: 150 PSI

HOUR

RATING

GALLONS

GALLON

CAPACITY

ENERGY
FACTOR

BTU

INPUT

PER

HOUR

RECOVERY

AT 90° F

RISE

FOAM

THICKNESS

(INCHES)

A B C D E F G H

DIMENSIONS IN INCHES

DRAFT

HOOD

OUTLET

SHIPPING

WEIGHT

LB

DRAFT HOOD

T&P VALV E

C

BC

COMPLIANT

A

B

D

GAS VALV E

ON/OFF SWITCH

DRAIN VALV E

F

G

H

HOT

CONNECTION

E

ANODE RO

COLD
CONNECTION

TOP VIEW

Flammable Vapour Ignition Resistant Water Heaters

This A. O. Smith FVIR design meets the American National Standards Institute standards (ANSI Z21.10.1 - 4.1 CSA Standards) that deal with the
accidental or unintended ignition of flammable vapours outside the water heater, such as those emitted by gasoline.

For Technical Information, call 1-888-479-8324. A. O. Smith reserves the right to make product changes or improvements without prior notice.

May 2013

www.hotwatercanada.ca

Page 2 of 2

CANRG45000