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R

R

DUOnex

ready

R

R

R

R

MULTIready

scalable systems

CO SAFETY

ICAD

R

ENGINEERED

$300

Federal Tax Credit

Home Energy Improvement

Up to

7.4

series

ENERGY EFFICIENCY

Government Tests Show that WaiWela 7.4 Series Tankless 

• 

Water Heaters use:

29% less energy than most 50 gallon tank-type heaters

• 

40% less energy than most 100 gallon tank-type heaters 

• 

84% Efficiency Rating; DOE Energy factor of 0.82.

• 

Uses energy only when hot water is demanded.

• 

HOT WATER PERFORMANCE

whole house
residential
gas tankless
water heater

SAFETY ENGINEERING

 

WaiWela’s 7.4 Series includes safety engineering not found 
on other brands, such as:

ICAD

• 

Our proprietary safety system that constantly 

monitors combustion for evidence of unsafe carbon 
monoxide (on all indoor and direct vent models).

Overheat limiter Wrap

• 

Resin film surrounds the 

combustion chamber, detecting overheating.

Flame Failure Safety Monitor

• 

Flame Rods ensure proper 

firing and detect flame failure.

Anti-Scald Protection:

• 

 

Bath Controller maximum 

temperature 120

°

F. When on, Bath Controller takes priority. 

While hot water is running, Bath Controller maximum 
temperature cannot be raised above 112

°

F.

Anti-Boil Protection

• 

Temperature Sensor.

Freeze Protection to -30

• 

°F

CONVENIENCE

Digital controller 

• 

changes temperature settings 

immediately and precisely with the touch of a button and 
functions as a diagnostic display.

Endless Hot Water

• 

 Never run out of hot water again.

RESIDENTIAL WARRANTY

12 Year 

• 

Limited Warranty on Heat Exchanger

5 Year 

• 

Limited Warranty on Parts

1 Year 

• 

Limited Warranty on Service

FREE

Lifetime Technical Support 
1.800.605.6542

 

RELIABILITY

With an average lifetime of 20 years 
or more, you can be sure your 
tankless water heater will pay for 
itself in energy savings alone.

 

EASY INSTALLATION

With Tankless Installation Valves 

• 

(TIV)
Compact walL-mounted design 

• 

saves valuable floor space
Versatile venting 

• 

HIGHER STANDARDS

Low NOx Emissions

• 

Safety Engineered

• 

Energy Efficient

• 

Built-in Diagnostics & Usage 

• 

Record

**Up to 3 simultaneous uses in a warm climate

cold climate performance*

warm climate performance**

*2 simultaneous uses in a cold climate

temperature rise (°F)

35

45

50

60

70

77

80

90

100

Gallons Per Minute

8.5

7.4

6.6

5.5

4.7

4.3

4.1

3.7

3.3

Gallons Per Hour

510

444

396

330

282 258 246 222

198

Above estimates are for sizing purposes only

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