Compare Propane Tankless Water Heaters
Compare ThermoMate propane tankless water heaters by flow rate, BTU output, installation type, and best-use scenario to find the right model for your home, cabin, apartment, or whole-home hot water needs.
| Model | GPM | BTU | Indoor / Outdoor | Best For | Fuel Type |
|---|---|---|---|---|---|
| CZ264LP | 2.64 GPM | 75,000 BTU | Indoor | Small homes, cabins, apartments, single bathroom use | Propane |
| CZ318LP | 3.18 GPM | 98,500 BTU | Indoor | Small to medium homes, cabins, 1–2 fixtures | Propane |
| CZ422LP | 4.22 GPM | 113,000 BTU | Indoor | Medium homes, bathrooms, kitchens, 2–3 fixtures | Propane |
| CZ480LP | 5.28 GPM | 114,000 BTU | Indoor | Whole-home use, larger households, multiple fixtures | Propane |
CZ264LP
GPM: 2.64 GPM
BTU: 75,000 BTU
Indoor / Outdoor: Indoor
Best For: Small homes, cabins, apartments, single bathroom use
Fuel Type: Propane
CZ318LP
GPM: 3.18 GPM
BTU: 98,500 BTU
Indoor / Outdoor: Indoor
Best For: Small to medium homes, cabins, 1–2 fixtures
Fuel Type: Propane
CZ422LP
GPM: 4.22 GPM
BTU: 113,000 BTU
Indoor / Outdoor: Indoor
Best For: Medium homes, bathrooms, kitchens, 2–3 fixtures
Fuel Type: Propane
CZ480LP
GPM: 5.28 GPM
BTU: 114,000 BTU
Indoor / Outdoor: Indoor
Best For: Whole-home use, larger households, multiple fixtures
Fuel Type: Propane
Efficient Hot Water Powered by Propane
A propane tankless water heater is a practical choice for homeowners who want hot water on demand without relying on a traditional storage tank. Instead of heating and reheating stored water all day, a tankless system heats water only when you turn on the tap. This helps improve energy efficiency, reduce standby heat loss, and free up valuable space in your home.
ThermoMate propane tankless water heaters are built for flexible applications, including bathrooms, kitchens, cabins, tiny homes, and off-grid living. Whether you need a compact unit for a single bathroom or a higher-capacity model for multiple fixtures, you can choose a solution based on your flow rate needs, installation location, and hot water demand.
Indoor Propane Tankless Water Heater Options
ThermoMate propane tankless water heaters are designed to provide dependable hot water for residential and light-use applications. Different GPM options make it easier to match the unit to your actual water demand, from compact 2.64 GPM models for smaller spaces to 5.28 GPM models for larger hot water needs.
When choosing a propane tankless water heater, consider your installation environment, ventilation requirements, fuel supply, water pressure, local climate, and local building codes. Indoor propane models typically require proper venting and should be installed according to the product manual.
How to Choose the Right Propane Tankless Water Heater
To choose the right propane tankless water heater, start by estimating how many fixtures you plan to use at the same time. A single shower or small cabin may only require a lower GPM model, while a home running a shower, sink, and appliance together will need a higher flow rate. You should also consider incoming groundwater temperature, household size, and whether the unit will be used year-round or seasonally.
- For small homes, cabins, apartments, or single-bathroom applications, a 2.64 GPM or 3.18 GPM propane tankless water heater may be suitable. For larger homes or multiple fixtures, a 4.22 GPM or 5.28 GPM model may provide better performance.
FAQ
The right size depends on how many fixtures you want to run at the same time and your required hot water flow rate. For one shower, a small cabin, or single-bathroom use, a 2.64 GPM or 3.18 GPM propane tankless water heater may be sufficient. For medium homes or multiple fixtures, choose a higher GPM model such as 4.22 GPM or 5.28 GPM. As a general rule, the more fixtures you run at once, the higher the GPM you need.
Yes, some propane tankless water heaters are designed for indoor installation. However, indoor models must be installed with proper ventilation, gas connection, water connection, and clearance according to the product manual and local codes. For safety and performance, professional installation is strongly recommended.
Yes. Indoor propane tankless water heaters usually require venting because propane combustion produces exhaust gases that must be safely directed outside. Proper venting helps ensure safe operation and stable performance. Always follow the installation manual and local building regulations.
Propane and natural gas can both power tankless water heaters effectively. Propane is often a good choice for cabins, rural homes, tiny homes, and off-grid locations where natural gas lines are not available. Natural gas may be more convenient for homes already connected to a gas utility line. The better option depends on your fuel availability, installation location, usage needs, and local energy costs.
Yes, a propane tankless water heater can be a good choice for a cabin, especially if the property does not have access to natural gas. Propane models are commonly used for cabins, tiny homes, remote properties, and off-grid living. Make sure to choose the correct model based on your water demand, installation environment, ventilation requirements, and local code requirements.