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Appliance details
9
Pressure drop curves
Note: Flow above 6 GPM is not permitted.
Fig. 8 GWH 345 ESR
Fig. 9 GWH 450 ESR
2.7 Water quality
Water quality can have an impact on appliance performance and appliance longevity, and may not be covered by the
manufacturer's warranty.
For water analysis data call your local water department. If on a well system, have well water analyzed periodically. If
water quality is exceeding one or more of the values specified below, Bosch recommends installing a water condi-
tioner or softener.
GWH 345 ESR
0 feet of head
10 feet of head
20 feet of head
30 feet of head
40 feet of head
50 feet of head
0 GPM 1 GPM 2 GPM 3 GPM 4 GPM 5 GPM 6 GPM
water flow rate
Inlet pressure
GWH 450 ESR
0 feet of head
10 feet of head
20 feet of head
30 feet of head
40 feet of head
50 feet of head
0 GPM 1 GPM 2 GPM 3 GPM 4 GPM 5 GPM 6 GPM
water flow rate
Inlet pressure
Descri-
ption
pH TDS
(Total
Dissolved
Solids)
Total
hardness
Aluminum Chlorides Copper Iron Manganese Zinc
Max.
Levels
pH
range
mg/l or
ppm
mg/l or
ppm
mg/l or
ppm
mg/l or
ppm
mg/l or
ppm
mg/l or
ppm
mg/l or ppm mg/l or
ppm
6.5-8.5 500 100 (6
grains)
0.2 250 1.0 0.3 0.05 5.0
Table 2 Venting Specifications