Quick Answer
Indoor heater installations are convenient but may require specialized ventilation systems to remove combustion gases and moisture, while outdoor installations can be exposed to harsh weather conditions and require additional protection and venting systems.
Pros of Indoor Heater Installations
Indoor tankless water heaters can be more convenient to install and maintain, as they are typically connected to the existing plumbing system and do not require additional venting or protection from the elements. However, they still require proper ventilation to remove combustion gases and moisture, which can be achieved through a direct vent or power vent system that can be up to 3-4 feet above the heater and 6-8 inches away from any combustible materials.
Choosing the Right Location for Outdoor Heater Installations
When installing an outdoor propane tankless water heater, it’s essential to select a location that protects the unit from harsh weather conditions, such as direct sunlight, heavy rain, and freezing temperatures. The ideal location should be at least 3-5 feet away from any combustible materials, and the vent should be at least 10 feet away from any windows or doors to prevent moisture from entering the building. Additionally, consider installing a freeze protection kit to prevent the water heater from freezing and causing damage. This kit typically includes a thermostatically controlled valve that can be installed on the cold water supply line, which will allow water to flow through the valve when temperatures drop below a certain threshold, preventing the water from freezing in the pipes. To size the valve, you’ll need to determine the minimum flow rate required to prevent freezing, which is typically 0.5-1 GPM.
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