Hot Water Recirculation Calculator
Calculate pump size and energy costs for hot water recirculation systems
About this calculator
The Hot Water Recirculation Calculator helps determine the optimal pump size and operating costs for hot water circulation systems. It calculates flow rates, head pressure requirements, and energy consumption based on your pipe diameter, system length, and flow velocity. This tool is essential for plumbers, engineers, and homeowners planning efficient hot water systems that minimize wait times while controlling energy costs and ensuring proper circulation throughout the building.
How to use
Enter your system's pipe diameter, total pipe length, and desired flow velocity. Input your local electricity rate and daily operating hours. The calculator will determine the required pump specifications, flow rate, and estimate annual energy costs for your hot water recirculation system.
Frequently asked questions
What pump size do I need for my home?
Most residential systems require 15-25 GPM pumps, but this depends on pipe diameter, system length, and number of fixtures served.
How much does it cost to run a recirculation pump?
Annual costs typically range from $50-200 depending on pump size, operating hours, and local electricity rates.
What's the ideal flow velocity for hot water systems?
Optimal velocity is 2-4 feet per second to ensure good circulation while minimizing pipe wear and energy consumption.