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Bosch On Demand DHW Heaters Model Comparison

Who Should Own One?

Instantaneous Tankless Water Heaters

A Giant Step Towards the Environmentally Responsible,

Energy Efficient Homes of the Future

                         Features

 

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Available with pilotless, battery powered electronic ignition, Piezo - ignition pilot or . 

Automatic flame failure gas cutoff and safety interlocked controls. 

Long life, high quality copper heat exchanger. 

Available in LP or natural gas.

Automatic overheat protection provided by high temperature limiter and pressure relief valve. 

82% efficient, low maintenance stainless steel burners. 

All parts in contact with water are stainless steel, copper or brass. Hot water is potable. 

Easy wall mounting and hook ups. 

Units may be connected in parallel in order to double the capacity of a single unit. 

Simple - safe - compact - lightweight - fuel efficient. 

No electricity required for operation of 'D' Cell powered unit - still have hot water with power outage. 

Efficient modulating burner automatically adjusts to water flow. 

Temperature selection knob allows wide range of flows and temperatures. 

Continuous flow. 

Warranty. Residential Units come with a 10 year Heat Exchanger and 2 year on parts. 

Fan assist side wall power vented model options are available for those difficult venting jobs.

 

FACTOR:
W125-K
W400-1K
WR400-7K & WR400-3K
WR430-3KV
Rated input (BTU/hr)
40,000
117,000
117,000
125,000 LP 130,000 NG
Minimum input (BTU/hr)
20,000
33,000
33,000
28,000
Maximum Flow Rate (GPM)
1.3
4.0
4.0
-
Minimum Flow Rate (GPM)
0.6
0.5
0.5
-

Hot Water Output (GPM):

 

 

 

(a) 45? rise (F)
1.3
1.0 - 4.0
1.0 - 4.0
1.0 - 5.0
(b) 100? rise (F)
0.6
0.5 - 1.8
0.5 - 1.8
0.5 - 2.5
Flue Size:
4"
5"
5"
4" PV
Water Inlet (NPT)
1/2
1/2
1/2
1/2
Water Outlet (NPT)
1/2
1/2
1/2
1/2
Gas Inlet (NPT)
1/2
1/2
1/2
1/2
Overall Size:
 
 
 
 
Height
25 3/8
30 5/16
30 5/16
30 5/16
Width
10 5/8
17 5/16
17 5/16
18 1/4
Depth
9 1/8
8 11/16
8 11/16
8 3/4
Shipping Weight
25lbs
44lbs
44lbs
45lbs
Gas Consumption:
 
 
 
 
LP-GAS (lbs./hr.)
0.9 - 1.85
1.5 - 5.4
1.5 - 5.4
1.5 - 5.8
NAT GAS (Cu.F./Hr.)
18.6 - 37.0
30.6 - 108.8
30.6 - 108.8
30.6 - 121
Inlet Water Pressure:
 
 
 
 
Min. pressure for showers
40
40
40
40
Min. working pressure (PSI)
13
13
13
13
Max. working pressure (PSI)
150
150
150
150
Gas Inlet Pressure Requirements:
 
 
 
LP-GAS
11
11
11
11
NAT.GAS
7
7
7
7
Efficiencies:
 
 
 
 
Thermal
81%
82%
82%
82%
Energy Factor (E.F.)
N/A
.69
.80
.78
NG & LP On Demand Boilers Natural Gas & Propane On Demand Boilers & DHW Heaters Contact Information

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No Utility Bills Inc. All rights reserved. Last modified: 04/18/15