Tankless water heaters offer energy efficiency and a continuous supply of hot water. To select the right unit for your home, consider the following factors:
1. Calculate Your Hot Water Demand
Determine the total gallons per minute (GPM) required during peak usage by adding the flow rates of all fixtures you expect to use simultaneously:
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Shower: 2.0–2.5 GPM
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Dishwasher: 1.0–1.5 GPM
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Washing machine: 1.5–2.0 GPM
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Kitchen sink: ~1.0 GPM
For example, using a shower (2.5 GPM) and dishwasher (1.5 GPM) simultaneously requires a unit that can handle at least 4.0 GPM.
Link to Downloadable GPM Calculator (Google Docs)
2. Assess Temperature Rise Requirements
Temperature rise is the difference between incoming water temperature and the desired output temperature. In colder climates, incoming water may be around 40°F, and if you desire 120°F at the tap, the unit must handle an 80°F rise. Ensure the selected heater can achieve this rise at your calculated GPM.
3. Choose the Appropriate Fuel Type
Tankless water heaters are available in electric, natural gas, and propane models:
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Electric: Ideal for smaller homes or point-of-use applications.
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Natural Gas/Propane: Suitable for larger households with higher hot water demands.
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Combi Boilers: Provide both space heating and domestic hot water, perfect for radiant floor systems.
HUG Hydronics offers a range of tankless water heaters in all these fuel types to meet diverse needs.
4. Consider Installation and Venting Requirements
Evaluate the installation location and venting needs:
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Indoor vs. Outdoor: Ensure the unit is rated for your intended installation environment.
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Venting: Gas units require proper venting; electric units typically do not.
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Space Constraints: Tankless units are compact but still need adequate space for installation and maintenance.
5. Evaluate Energy Efficiency
Look for units with high Energy Factor (EF) ratings, indicating better energy efficiency. While high-efficiency models may have a higher upfront cost, they can lead to significant savings over time.
Need Assistance?
Choosing the right tankless water heater involves several considerations. HUG Hydronics is here to help you navigate these choices and find the perfect fit for your home. Contact us at sales@hugllc.com or call 218-587-5001 for expert guidance.