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ATWOODON-DEMAND

WATERHEATERS

Endless Hot Water

Energy Efficient

Designed to Fit

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HOW ON-DEMAND WORKS

1. Hot water tap is turned on

2. Flow sensor detects flow of

cold water coming in

3. The burner is automatically

ignited

4. Water is instantly heated up

as it circulates through the

heat exchanger and out to

the tap

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ENDLESS HOT WATER

0 10 20 30 40 50 60

On-Demand

Tank

Since Atwood’s on-demand water heater instantly heats water, it can supply a constant

stream of hot water that is limited only by the fresh water supply.

Gallons of Hot Water Per Hour

Traditional

Tank

Water Heater

Atwood

On-Demand

Water Heater

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WEIGHT SAVINGS

0

25

50

75

100

125

150

Atwood

On-Demand

6-Gal Tank 10-Gal Tank 12 Gal Tank

+52 lbs.

+97 lbs.

+115 lbs.

An on-demand water heater does not use a tank, thus

eliminates up to 115 pounds of dead water weight.

Atwood

On-Demand6-Gallon

Tank

10-Gallon

Tank

12-Gallon

Tank

Only 30

lbs.

Water

Weight

Tank

Weight

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ENERGY EFFICIENT

ATWOOD ON-DEMAND

HOUR 1 HOUR 2 HOUR 3 HOUR 4 HOUR 5 HOUR 6 HOUR 7

Initial

tank

warm-

up

Heat

recovery

Heat

recovery

5 Minute

showerHeat

recovery

TRADITIONAL TANK

HOUR 1 HOUR 2 HOUR 3 HOUR 4 HOUR 5 HOUR 6 HOUR 7

5 Minute

shower

On-demand water heaters only heat water when it is needed. No wasted energy.

Traditional tank water heaters must turn on periodically to

maintain the stored hot water temperature.

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COLD WEATHER PERFORMANCE

High output burners deliver hotter water more days of the year.

Just because it is cold outside doesn’t mean you get a cold shower.

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SIMPLE OPERATION

1. Turn on HOTwater

2. Mix in COLD to reach

desired temperature

BRAND X

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MODULATION VALVE

A flow controlled valve adjusts the burner input from 16,000 - 45,000/50,000 BTUs

based on water flow rate (The slower the flow, the less heat that is needed). This

provides for optimal operating efficiency.

BRAND X ON-DEMAND

ATWOOD ON-DEMAND

2 settings only at 27,000 and 34,000 BTUs. Results in not enough

power on cold days and wasted energy on hot days.

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ONE SIZE FITS ALL

Wide side flanges and an adapter plate allow Atwood’s On-Demand to easily fit

the rough opening for all other brands of RV water heaters.

Fits 12.5” to 16” width

2-5/8” wide

flange

Adapter plate

required for

10-gallon (or larger)

water heater

openings only

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BENEFITS OF ATWOOD ON-DEMAND

� Performance – Class leading 45 and 50k BTU high output burners

deliver more hot water, more days of the year.

� Operation – No customer training needed. Turn on HOT and add

cold to get desired temperature. Just like home.

� Continuous hot water – No more RV showers. Hot water is only

limited by the fresh water supply.

� Save weight - No tank saves up to 100 lbs. of unnecessary water

weight.

� Energy efficient - Only uses energy when hot water is demanded.

� One size fits all – Designed to easily fit the rough opening for any

brand of RV water heater.

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One Size

Fits All

Design

High and

low

heating

modes

Heat

exchanger

Powerful

45k or 50k

modulating

burner

Only 30

lbs. (no

tank full

of water)

Two year

warranty

Adapter kit

10-Gallon+

rough

openings

Electronic

flow

sensor

Consistent

Hot Water

ATWOODON-DEMAND

WATER HEATERS