Maxwell MS270C2TMU User Manual

ºF

77º

72º

67º

62º

57º

52º

47º

42º

37º

Heater Sizing GuideHeater Sizing Guide

SERIES

There are many factors that go into selecting the right water heater: the number of people in the home, type
of showers and tubs, water pressure and geographic region. To make the process easier, we offer the map
and flow-rate table below.

1. On the map, determine the ground water temperature in your area.

2. In the corresponding column select the water heater based on how many fixtures you'll be running
at the same time.

3. The temperatures shown above are based on the average coldest ground temperature in your region.

Heater Sizing Guide

Summer Winter

Inlet Water

Model Nº

Temp.

MS120C2P_U

MS150C2P_U

MS180C2P_U

MS210C2P_U

MS240C2P_U

MS270C2P_U

Shower (1.5 gpm) ― Sink Faucet (1.0 gpm)
All data above are based on water leaving temperature 105º F (40º C). 1.5 gpm showerhead flow rate; 1.0 gpm sink faucet
flow rate, and adequate water pressure @ 60 psi. Actual performance may be altered by variations from these parameters.
For voltages less than 240 V the heating capacities will vary and it would be necessary to consider a higher capacity model.

77º F 72º F 67º F 62º F 57º F 52º F 47º F 42º F 37º F

2.7 gpm 2.4 gpm 2.2 gpm 2.1 gpm 1.8 gpm 1.5 gpm 1.3 gpm 1.2 gpm 1.1 gpm

3.5 gpm 3.2 gpm 2.6 gpm 2.5 gpm 2.3 gpm 2.0 gpm 1.7 gpm 1.5 gpm 1.3 gpm

4.0 gpm 3.6 gpm 3.2 gpm 3.0 gpm 2.7 gpm 2.5 gpm 2.3 gpm 2.1 gpm 1.8 gpm

5.0 gpm 4.5 gpm 3.8 gpm 3.5 gpm 3.2 gpm 2.7 gpm 2.4gpm 2.2 gpm 2.1 gpm

5.6 gpm 4.8 gpm 4.2 gpm 3.5 gpm 3.3 gpm 2.8 gpm 2.6gpm 2.4 gpm 2.2 gpm

6.4 gpm 5.3 gpm 4.7 gpm 4.0 gpm 3.6 gpm 3.3 gpm 3.0gpm 2.7 gpm 2.5 gpm

Shower Sink Faucet