Ranein RH8K-LPG-FC-RATING 80,000 BTU Propane Tankless Water Heater

What it delivers

The Ranein RH8K-LPG-FC-RATING 80,000 BTU Propane Tankless Water Heater is a propane tankless with a 80,000 BTU/h burner and a stated maximum flow of 3.6 GPM.

Worked out from its input, it delivers roughly 2.7 GPM when the water only has to rise 45°F, and 1.8 GPM at a 70°F winter rise: 1 shower at 2 GPM in summer, less than one 2 GPM shower in winter. Size it to your fixtures and climate.

Gas load at full fire: about 0.9 gallons of propane 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.

Other listed details: features: LED Display; material: Propane; model: RH8K-LPG-FC-RATING; warranty: 2 Year Manufacturer.

The listing gives dimensions of 13.8 in (W) x 21.7 in (H) and a weight of 18 lb.

Warranty, per the listing: 2 Year Manufacturer.

Right unit for this house?

Install it when

One shower at a time in cold climates
Propane homes
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

80,000 BTU/h input
Up to 3.6 GPM

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	RH8K-LPG-FC-RATING	Retailer
Dimensions (seller)	13.8"W x 21.7"H	Retailer
Features (seller)	LED Display	Retailer
Voltage	120 V AC	Retailer
Max flow (maker)	3.6 GPM	Retailer
Input (maker)	80,000 BTU/h	Retailer
Product weight	18 lb	Retailer
Material	Propane	Retailer
Warranty	2 Year Manufacturer	Retailer
Fuel	propane	Retailer

Rival units at this flow

LiberLive HKRV-HR2110 80,000 BTU Propane Tankless Water Heater80,000 BTU/h, up to 3.6 GPM.

VancEpic V-RH8K-LPG 80,000 BTU Propane Tankless Water Heater80,000 BTU/h.

VELPAX VX-CT06 Propane Tankless Water Heater81,888 BTU/h.

More gas tankless water heaters rated for similar demand

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

Final verdict

A sensible propane tankless for one shower at a time in cold climates.

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Questions buyers ask

How many showers can the Ranein RH8K-LPG-FC-RATING 80,000 BTU Propane Tankless Water Heater run at once?

From its 80,000 BTU/h input we estimate about 2.7 GPM at a 45°F rise and 1.8 GPM at a 70°F rise, so 1 two-GPM shower with mild inlet water and 0 in a cold winter. The maker's flow chart for this model is the final word.

What size gas line does the Ranein RH8K-LPG-FC-RATING 80,000 BTU Propane Tankless Water Heater need?

At full fire it uses about 77 cubic feet of natural gas an hour or 0.9 gallons of propane. 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.