What it delivers
The Westinghouse HW180A0G-LP 180,000 BTU Propane Tankless Water Heater is a propane tankless with a 180,000 BTU/h burner and a stated maximum flow of 7.9 GPM.
Worked out from its input, it delivers roughly 6.2 GPM when the water only has to rise 45°F, and 4.0 GPM at a 70°F winter rise: 3 showers at 2 GPM in summer, 1 shower at 2 GPM in winter. Size it to your fixtures and climate.
At full fire it burns about 2.0 gallons of propane an hour. The gas line has to carry that on top of the furnace, range and dryer; a gas fitter sizes the pipe from its length and the total load.
Its exhaust runs hot, so the vent must be the material its manual lists, usually stainless; budget for the vent kit.
The listing describes its venting as: outdoor installation.
Other listed details: features: CSA-Certificated, Easy to Install, WIFI&APP Control, ±1℉ Temp Control; connections: 3/4" npt; connectivity: WiFi; model: HW180A0G-LP.
The listing gives dimensions of 17.1 in (W) x 26.8 in (H).
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
- 180,000 BTU/h input
- Up to 7.9 GPM
Trade-offs
- Needs a gas line sized for the load
- Stainless venting costs more
- Annual flushing on hard water
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 | HW180A0G-LP | Retailer |
|---|---|---|
| Dimensions (seller) | 17.1"W x 26.8"H | Retailer |
| Features (seller) | CSA-Certificated, Easy to Install, WIFI&APP Control, ±1℉ Temp Control | Retailer |
| Voltage | 120 V | Retailer |
| Max flow (maker) | 7.9 GPM | Retailer |
| Input (maker) | 180,000 BTU/h | Retailer |
| Fuel | propane | Retailer |
| Venting | outdoor installation | Retailer |
| Connections | 3/4" npt | Retailer |
| Connectivity | WiFi | Retailer |
Rival units at this flow
More gas tankless water heaters rated for similar demand
- Rheem RTG-95DVELP-3 199,900 BTU Propane Tankless Water Heater
- Noritz NRC66DVLP Propane Tankless Water Heater
- Rheem RTGH-95DVLN-3 199,900 BTU Natural Gas Condensing Tankless Water Heater
- Rinnai RX199iN Condensing Tankless Water Heater
Full gas tankless water heaters spec grid · Every Westinghouse unit in the catalog
Final verdict
A sensible propane tankless for one shower at a time in cold climates.
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