Propane tankless water heater questions, made simple.
Is a propane tankless water heater right for my home?
Yes—if your home uses an LP propane supply. A propane tankless water heater provides hot water on demand without taking up the floor space of a traditional storage tank. Mizudo offers propane-compatible options from compact 4.0 GPM indoor models to the GEN 3 10.3 GPM indoor direct-vent model, so you can choose around your home’s installation location and hot-water demand.
Can a propane tankless water heater run two showers at once?
Often, yes—but the right model depends on your climate and total water use. If two showers may overlap, start by comparing Mizudo’s 7.9 GPM, 8.1 GPM, and 10.3 GPM options. If showers overlap with kitchen or laundry use, higher-flow models offer more capacity for those busy periods. In colder climates, incoming water needs more heating, so available hot-water flow can be lower than the maximum GPM shown.
What size propane tankless water heater do I need?
Choose for simultaneous use, not household size alone. A 4.0–5.1 GPM model can suit lighter demand, such as one main shower or a shower paired with occasional faucet use. For homes where multiple hot-water fixtures may run together, compare the 7.9–10.3 GPM range. The best match depends on the fixtures you expect to use at the same time and your local incoming-water temperature.
Should I choose an indoor or outdoor propane tankless water heater?
Choose based on where the unit will be installed. Mizudo offers indoor propane-compatible options in 4.0 GPM, 5.1 GPM, 7.9 GPM, and 10.3 GPM configurations. Its outdoor propane-compatible range includes 5.1 GPM and 8.1 GPM options, while one 5.1 GPM model offers indoor/outdoor flexibility. Start with the location you have available, then compare the models designed for that setup.
Do indoor propane tankless water heaters need venting?
Yes. Indoor gas tankless water heaters need an approved route to move combustion exhaust outdoors. Mizudo’s indoor lineup includes different configurations, including power-vent and direct-vent applications. For example, the GEN 3 10.3 GPM model is designed for indoor direct-vent installation, so its matching vent components should be selected with the heater.
Do propane tankless water heaters need electricity?
Yes. Propane supplies the heat, but modern tankless water heaters use electricity for ignition, controls, safety systems and, on some models, fan operation and smart features. Mizudo’s GEN 3 10.3 GPM indoor direct-vent model uses 120V power and includes Smart Wi-Fi control.
Can I replace my propane tank water heater with a tankless model?
Usually, yes. The main change is how you select capacity: instead of matching the gallon size of the old tank, choose a tankless model around your household’s peak hot-water demand. Consider how many showers, faucets, and appliances may need hot water at once, then compare Mizudo propane models by installation type, BTU output, and published flow performance.
What is the difference between propane and natural gas tankless water heaters?
The right choice depends on the fuel your home already uses. Choose a Propane model for an LP propane supply and a Natural model for a natural-gas line. Mizudo offers both fuel options across much of its tankless range, but the selected fuel variant must match your home’s supply. If your home is connected to natural gas, explore our Natural Gas Tankless Water Heaters.