# Westinghouse AMZ-HS120A1G-LP Propane Tankless Water Heater, 5.1 GPM

Westinghouse AMZ-HS120A1G-LP is an outdoor wall-mounted propane tankless water heater listed at up to 5.1 GPM and 120,000 BTU. Its wired controller and claimed 2–4-fixture capacity suit buyers planning a compact whole-home or point-of-use installation, subject to local installation requirements.

- [Original product page](https://best-deals.pro/product/westinghouse-amz-hs120a1g-lp-propane-tankless-water-heater)
- [View offer](https://best-deals.pro/visit/westinghouse-amz-hs120a1g-lp-propane-tankless-water-heater)
- Market: US
- Language: en-US
- Currency: USD
- Brand: Westinghouse
- Model: AMZ-HS120A1G-LP
- Price: 569.99 USD
- Previous price: 799.99 USD
- Discount: 29%
- Price checked: 2026-11-14T07:07:38.186Z
- Rating: 4.8 / 5
- Reviews: 16

Prices and deal status are the latest recorded data, not a guarantee of availability. Confirm the price and availability with the store.

## At a glance

- Outdoor propane unit with listed flow up to 5.1 gpm and heat output of 120000 british thermal units.
- The listing says it supports 2–4 fixtures and describes temperature stability of ±1°F. These are manufacturer claims, not independently established performance.
- A wired digital controller is described with an adjustable 95°F–158°F range and error-code display.
- Listed freeze protection applies to the unit. The manufacturer says external pipes need separate insulation and advises draining the unit if temperatures fall below 32°F without continuous power.

## Pros

- Outdoor wall-mount design avoids allocating indoor wall space for the heater.
- A wired controller and self-diagnosis display are described for temperature adjustment and troubleshooting.
- The stated 5.1 gpm flow and claimed 2–4-fixture support may fit modest multi-fixture demand, depending on conditions.

## Cons

- The listing requires a 120V AC power supply in addition to propane, so it is not a gas-only installation.
- Freeze protection does not cover external plumbing, which requires separate insulation.

## Specifications

### Identity
- Brand: Westinghouse
- Model: AMZ-HS120A1G-LP
- Power configuration: gas\_powered
### Water heating
- Listed capacity: 16 liters
- Flow rate: 5.1 gpm
- Maximum temperature: 158 °F
- Heat output: 120000 british thermal units
- Maximum pressure: 150 psi
### Dimensions and installation
- Mounting type listed: Wall
- Dimensions listed: 15.5"W x 23.9"H
- Depth: 7.3 inches
### Controls and features
- Listed features: 5 Years After-Sale Support, CSA Certified, Easy to Install, Remote Control, Temperature Lock

## Before you buy

- Listing details are not fully consistent: the title and feature copy identify an outdoor propane unit at 5.1 GPM and 120,000 BTU, while the detail field lists capacity as 16 liters and the power field only says gas-powered. Confirm the selected model’s fuel, capacity and installation requirements before purchase. The claimed ±1°F stability and 2–4-fixture support are listing claims, not independently verified. Professional licensed installation is recommended. The stated freeze protection applies only to the unit. The listing advises fully draining it below 32°F if continuous power is unavailable, and insulating external pipes separately.

## In the box

- Tankless water heater × 1 (Included)
- User manual (Included)
- Wire control panel × 1 (Included)

## A good fit for

- Households seeking an outdoor propane tankless heater for a claimed 2–4-fixture setup.
- Buyers who want a wired digital temperature controller and can provide a 120V AC connection.

## Less suited to

- Buyers who need an indoor heater or a system that operates without electrical power.
- Installations where the external water lines cannot be protected from freezing.

## Customer feedback

Aggregate ratings are largely in the top two star categories, but the sample is small and provides no written feedback here. It offers limited evidence about customer experience and does not establish performance, installation ease or reliability for this particular 5.1 gpm outdoor propane configuration.

## Frequently asked questions

### Does this heater run on propane only?
The title and product copy identify it as propane, but the detail field describes the power source only as gas-powered. The listing also requires a 120V AC supply, so confirm fuel and electrical requirements for the selected model.
### Can it supply several fixtures at once?
The listing claims support for 2–4 fixtures and a maximum flow rate of 5.1 gpm. Actual suitability depends on installation and demand, and the stated support is not independently verified.
### Does its freeze protection protect the plumbing?
No. The listing says freeze protection applies to the unit only and that external pipes need separate insulation. It advises draining the unit below 32°F if continuous power is unavailable.
### What is included?
The stated contents list includes one tankless water heater, one user manual and one wire control panel.

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## Add-ons

- [HYDRO MASTER Tankless Water Heater Service Valve Kit with Pressure Relief Valve 3/4-Inch IPS Isolator Clean Brass](https://best-deals.pro/visit/westinghouse-amz-hs120a1g-lp-propane-tankless-water-heater)

## Images

![Westinghouse AMZ-HS120A1G-LP Propane Tankless Water Heater, 5.1 GPM — 1](https://best-deals.pro/i/RSnD_OOlNO2VqhMrbaoZA_GLT4GUaYDmXizX0fzVMoj55-DcLKDqTgVfG5J1eFybqUkR0pffuBKmS3rB_0OyILIMftphGUfYg1RmpFxjpLxO1bezPeOBQLgG.jpg)

![Westinghouse AMZ-HS120A1G-LP Propane Tankless Water Heater, 5.1 GPM — 2](https://best-deals.pro/i/BbV1fRz4caj-ULIo0gS1ZNfpQt3QknXpa8xBhpDQ2kqf0VkfM-X4vnpSOO2MC2yPdTy3X0qNlGlbBKsvbGOG_dW26NgQdpYkXw9fJKisv7Dhd3zXfxOB8Qxl.jpg)

![Westinghouse AMZ-HS120A1G-LP Propane Tankless Water Heater, 5.1 GPM — 3](https://best-deals.pro/i/CO9Xnjd4PfRcKjfNWObPW1um9ee74EZqmnNwUBtLsOGCjP77Ba5XZUvTG2rzkl60pPZbsPjzLysrp4yP9xQm9DdFfMPnhH0WHixd3C7vhyo69uoSyHTB-Rg-.jpg)

![Westinghouse AMZ-HS120A1G-LP Propane Tankless Water Heater, 5.1 GPM — 4](https://best-deals.pro/i/2MWz5XwHbQyXCO_sGgVfqZdsICvkm8a-5OD_D4bVyUp-W3mRlvKBLxSVxXqUNvfCwBNvYGmDxjiwvoeYS5orlr0LRJf9PRChZw-OzAnCGJir_fNGuZ5WaNbA.jpg)

![Westinghouse AMZ-HS120A1G-LP Propane Tankless Water Heater, 5.1 GPM — 5](https://best-deals.pro/i/w5JF_uBemNnagO8XGnB2RUUG7Sa3QoUeioZtTirowH40JUPpF2OlES5bNXOOqPOq3MgljySkzmS3D2PVyAMaO9YxOkCpUBJ6ncgGzjoRD9FJy5z_eMGaflZB.jpg)

![Westinghouse AMZ-HS120A1G-LP Propane Tankless Water Heater, 5.1 GPM — 6](https://best-deals.pro/i/PJhyHv9f0tUX2qibY8WDw6l88cAwkbQLLLY1mAPv7HHaLxOiV4T4KqTWTb50M-RTtpeQkLtveWzcA9rHmhebTiBRVrey4OuRHa1xDXFSR5F14tG2kc44IKq5.jpg)

![Westinghouse AMZ-HS120A1G-LP Propane Tankless Water Heater, 5.1 GPM — 7](https://best-deals.pro/i/AoRfG_D50StiuVi3Ny5MEz2oIL066OPnOdOvdNN3AOq8pXDotjwPPiQ0QlXtihPDDhOxLmaCigWuIOPCoG2OuXcWq-6Lb_aUQA_x80EPRFfW7SoU0Y6j9PoW.jpg)