Friedrich FDTGH-SR10I

Friedrich FDTGH-SR10I is a gas tankless water heater from Friedrich rated 5.2 GPM at a 0.96 UEF.

Efficiency
Uniform Energy Factor (UEF) 0.96
Annual gas use (natural gas) 176 therms/yr
Recovery efficiency 98 %
Annual propane use 192.35 gal/yr
General
Fuel Natural Gas, Propane
Capacity
Max flow rate 5.2 GPM
Draw pattern High
Minimum activation flow 0.4 GPM
Performance
Gas input rate 180 kBTU/h
Installation
Max current draw 2 A
Vent type Direct Vent
Vent size 2
Smart features
Smart / connected capable No
Dimensions
Width 18.1 in
Depth 13.6 in
Certification
ENERGY STAR certified Yes

Real flow rate by climate

A tankless heater's usable flow depends on how far it must raise incoming water temperature. Sustained hot-water flow of the Friedrich FDTGH-SR10I at common temperature rises (a typical shower uses about 2 GPM of mixed water):

Temperature rise Climate Sustained flow Simultaneous showers
45 °F Warm climate (~75 °F groundwater) 5.2 GPM 2
55 °F Mild climate (~65 °F groundwater) 5.2 GPM 2
70 °F Cold climate (~50 °F groundwater) 4.9 GPM 2
77 °F DOE test condition 4.5 GPM 2

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Frequently asked questions

Is the Friedrich FDTGH-SR10I ENERGY STAR certified?

Yes, the Friedrich FDTGH-SR10I holds a current ENERGY STAR certification for water heating efficiency (UEF 0.96).

How much does the Friedrich FDTGH-SR10I cost to run per year?

About $255 per year at national average energy rates, based on its certified annual energy use under the DOE test draw pattern. Your rate and usage change this figure.

What venting does the Friedrich FDTGH-SR10I use?

The Friedrich FDTGH-SR10I uses Direct Vent venting with 2 in vent connections. Matching the existing vent type is usually the cheapest replacement path.

Is the Friedrich FDTGH-SR10I a smart water heater?

No, the Friedrich FDTGH-SR10I is not connected-capable — it has no app connectivity or demand-response support.

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