GASLAND C 150 150,000 BTU Natural Gas Tankless Water Heater

What it delivers

The GASLAND C 150 150,000 BTU Natural Gas Tankless Water Heater is a non-condensing gas tankless with a 150,000 BTU/h burner and a stated maximum flow of 5.8 GPM. Its listing gives a UEF of 0.8.

Expect about 3.3 GPM with cold winter water (a 70°F rise) and 5.1 GPM when the inlet is milder (45°F rise); that is 1 shower at 2 GPM in January. Run your house through the planner.

Gas load at full fire: about 145 cubic feet of natural gas an hour. An older half-inch line that already feeds a furnace often can't spare that, so have a gas fitter check the pipe size and run.

Non-condensing indoor units run hot exhaust and vent in the maker's listed vent system (often stainless Category III), which costs more than plastic.

Listed details: features: Energy Efficient & Space-Saving Design; material: Gasmart C; model: C 150.

The listing gives dimensions of 3.54 in (W) x 23.3 in (H).

Right unit for this house?

Install it when

One shower at a time in cold climates
Replacing a gas tank heater

Look at another unit when

More than 1 winter shower at once
Homes without a gas line

Strengths and trade-offs

Strengths

150,000 BTU/h input
Up to 5.8 GPM
UEF 0.8

Trade-offs

Needs a gas line sized for the load
Stainless venting costs more
Scale builds up without flushing

Install limits

Figures are the maker's or seller's own. Flow at a rise is our estimate from the input; gas, venting and electrical work needs a licensed professional.

Rated performance

Every figure below comes from the source shown in brackets. Where the maker doesn't state something, we say so instead of estimating.

Model number	C 150	Retailer
Dimensions (seller)	3.54"W x 23.3"H	Retailer
Features (seller)	Energy Efficient & Space-Saving Design	Retailer
Input (maker)	150,000 BTU/h	Retailer
Material	Gasmart C	Retailer
Max flow (maker)	5.8	Retailer
UEF (maker)	0.8	Retailer
Fuel	Natural Gas	Retailer

Rival units at this flow

Camplux CA528 150,000 BTU Natural Gas Tankless Water Heater150,000 BTU/h.

Camplux CA528M-NG 150,000 BTU Natural Gas Tankless Water Heater150,000 BTU/h, up to 6.4 GPM.

GASLAND CE528NG 150,000 BTU Natural Gas Tankless Water Heater150,000 BTU/h, up to 5.8 GPM.

More gas tankless water heaters rated for similar demand

Full gas tankless water heaters spec grid · Every GASLAND unit in the catalog

Final verdict

A well-specified non-condensing gas tankless for one shower at a time in cold climates.

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Questions buyers ask

How many showers can the GASLAND C 150 150,000 BTU Natural Gas Tankless Water Heater run at once?

From its 150,000 BTU/h input we estimate about 5.1 GPM at a 45°F rise and 3.3 GPM at a 70°F rise, so 2 two-GPM showers with mild inlet water and 1 in a cold winter. The maker's flow chart for this model is the final word.

What size gas line does the GASLAND C 150 150,000 BTU Natural Gas Tankless Water Heater need?

At full fire it uses about 145 cubic feet of natural gas an hour. The pipe size depends on the length of the run and every other gas appliance on it; the maker's manual and a licensed gas fitter decide it.