FS-380P Flow Switch for Tankless Hot Water Heaters
January 25, 2021
Hot water heating accounts for around 20% or more of the average household annual energy cost within the United States. Typical hot water heaters store hot water within a tank at a temperature between 120°F and 140°F. Even with no demand for hot water, the burner will energize to maintain the proper water temperature. However, the heat will eventually transfer through the tank walls, or excess heat escapes through the flue pipe. This can account for 10-20% of the annual water heating cost. One way to reduce these standby losses is to use an on-demand or tankless water heater.
Challenge
Finding a reliable flow switch to save energy costs
On-demand hot water heaters require a flow switch to determine when the burner needs to turn on. Typically, the burner is off when there is no hot water usage, which helps save energy. The challenge is to install a low-cost, yet reliable, flow switch that signals the hot water heater to energize when there is a call for hot water.
Solution
FS-380P Inline Plastic Flow Switch
Gems FS-380P Series Inline Plastic Flow Switch has wetted material options compatible with potable water applications. This rugged industrial switch is an economical alternative to metal flow switches. This flow sensor can detect flow as low as 0.07 GPM, signaling the burner to energize even at the lowest demand for hot water. Additionally, the inline flow switch design prevents a significant pressure drop, unlike other 90-degree flow switch designs.
Gems' FS-380P Series Inline Plastic Flow Switch is an excellent choice for on-demand hot water heaters, helping to provide an endless supply of hot water.