Replacing your existing water heating system with a tankless water heater is a fuel-efficient and cost effective choice. Tankless water heaters, also called demand or instantaneous water heaters, heat water as needed. No hot water gets stored in an internal tank, so there is no standby heat loss from hot water that hasn’t been used yet. This saves money by eliminating unavoidable energy loss.
Tankless water heaters provide a steady supply of hot water on demand, but the unit must be sized correctly to meet those demands. That is, it must be able to generate the amount of hot water you want when you want it. If you expect to have several devices, appliances or household tasks consuming hot water at the same time, you will need a unit large enough to supply enough water for that level of use.
Two important concepts in sizing a tankless water heater are flow rate and temperature rise. Flow rate is the total number of gallons of hot water needed per minute to meet the highest level of demand. To calculate flow rate, list the hot water devices you are most likely to be using at the same time. Add up the total gallons per minute of water these appliances consume. That total is the flow rate your tankless water heater must accommodate. A plumbing professional can help you determine your home’s flow rate, as well as the needed temperature rise.
Temperature rise is the difference between the temperature of water coming into your house and the temperature you want the heated water to be as it flows out of your faucets. For example, if the temperature of water coming into your house is 50 degrees and you want your hot water at 120 degrees, your tankless water heater must provide a temperature rise of 70 degrees.
Team Bob’s Heating Cooling Plumbing has been a reliable source of HVAC sales and service in Traverse City and the surrounding area for over 30 years. Our NATE-certified technicians provide high-quality service and repair performed to exacting industry standards. Contact us todayfor answers to your questions about tankless water heaters and for help finding a unit that is right for your home’s needs.
Our goal is to help educate our customers about energy and home comfort issues (specific to HVAC systems). For more information about tankless water heaters and other HVAC topics, download our free Home Comfort Resource guide.
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