Propane Tankless Water Heater Outdoor - On-Demand 120,000 BTU 5.1 GPM

Our review of the Orbek Propane Tankless Water Heater Outdoor finds it best suited to homeowners who need reliable, continuous hot water outdoors or in unheated spaces. The single biggest reason to consider this unit is consistent on-demand heating: with up to 120,000 BTU and roughly 5.1 GPM, it can serve multiple fixtures simultaneously without a storage tank. The unit is built specifically for outdoor installation with weather resistance and safety systems that make it a practical choice for cabins, workshops, or homes wanting a compact, powerful propane solution.

Key Features

• Endless On-Demand Hot Water: Delivers up to 5.1 GPM so two to four fixtures can run comfortably at the same time without running out of hot water.
• Outdoor Durability: Rated to withstand strong winds and with IPX4 surface protection, it is designed to keep operating in rainy or cold environments.
• Advanced Safety: CSA certified and equipped with dry combustion protection, overheat and flame failure safeguards to reduce risk during operation.
• Stable Temperature Control: A built-in chip adjusts heating power rapidly to maintain temperature within 1F for consistent shower comfort.
• Energy Efficient Heat Exchanger: Oxygen-free copper heat exchanger improves heat transfer and resists corrosion for longer life and lower fuel use.
• Remote Control and Display: LED display and wired remote let you set temperatures from 95F to 149F with power-off memory for convenience.

Who It's For

The Orbek outdoor propane tankless heater is ideal for rural or remote homes, cabins, and outdoor buildings where natural gas is unavailable and propane is the fuel of choice. Its low water pressure start and 3/4' NPT connector make it practical for installations that have variable water supply or need a compact, powerful outdoor-mounted unit.

This model is less suitable for buyers who need an indoor tankless solution or those who prefer electric units; it also assumes professional installation for safe propane and pressure relief valve integration, since some installation parts like the valve kit are not included.

Pros & Cons

Pros

• High output of 120,000 BTU supports multiple fixtures without a tank.
• Weather-resistant design and IPX4 surface protection for reliable outdoor use.
• Comprehensive safety features and CSA certification provide peace of mind.
• Precise temperature control with remote and stable 1F regulation for comfort.

Cons

• Valve kit with 150 PSI pressure relief valve is not included and must be purchased separately.
• Professional installation is recommended, which adds to upfront cost.

Specifications

Fuel Type	Propane
Maximum Output	120,000 BTU
Maximum Flow Rate	Up to 5.1 GPM
Connector Size	3/4' NPT
Voltage	120V AC
Dimensions	15.5 in L x 7.3 in W x 24.0 in H
Water Pressure Range	15 to 150 PSI

Our Verdict

The Orbek Propane Tankless Water Heater Outdoor is a solid value for those who need dependable, high-capacity hot water outdoors or in off-grid settings. Its robust safety features, precise temperature control, and durable heat exchanger make it a practical long-term choice, provided you plan for professional installation and the separately supplied pressure relief valve kit.

Frequently Asked Questions

Is the wired temperature controller included?
Yes, the wired remote controller and LED display are included with the unit.

Do I need to buy any extra parts to install?
You will need a valve kit with a 150 PSI pressure relief valve, which is not included with the product.

Can it operate in low water pressure areas?
Yes, the heater supports low water pressure start technology and operates from 15 to 150 PSI.