The Advantages of Smart Recirculation Technology in Tankless Water Heaters
Smart technology has been incorporated into nearly every appliance within the home, including faucets, refrigerators, security systems, lights and more. Most of these technologies provide energy savings and efficiencies for the home, making them highly desirable to home owners. When looking at major appliances that impact utility bills, such as water heaters, the desire for a smarter, more efficient home appliance increases.
Tankless water heaters are an excellent choice when it comes to selecting technology that saves money in the long run. Tankless units are available with control apps, where home owners can schedule and correlate hot water with their busy schedules, saving energy and water. But even those apps have already been replaced with newer and smarter tankless water heater technology, such as Rinnai’s new Smart-Circ™ Intelligent Recirculation™ featured in the recently launched RE Series™. This technology learns a user’s hot water schedule over seven days and without any prompt, schedules a recirculation pattern, delivering hot water when needed.
The addition of smart recirculation benefits not only your customer but you as the installer, by significantly reducing time spent on installation. The main difference is you no longer have to set up control apps or educate the customer on how to use them. Simply install and let the technology work its magic.
Smart recirculation technology tracks each time a significant hot water usage occurs, such as a shower or a bath. The technology records it and then will schedule recirculation at that same time for the next seven days. This allows some fluctuations in schedules, for instance, if a schedule deviates, such as needing to leave earlier in the day, the technology constantly learns and adjusts to new water usage. So should something happen to schedules, the water heater will learn and schedule thereafter accordingly. The tankless technology will eventually forget the old schedule if significant hot water usage doesn’t reoccur.

When speaking with a customer on smart recirculation, below are a list of benefits that provide a positive user experience:
- Receiving never-ending hot water without having to set schedules or prompt with on-demand devices.
- Saving on water usage, as the recirculation pattern reduces the need to run water from a faucet or other appliance until it reaches the desired temperature.
- Saving on energy consumption with hot water delivery being scheduled based on past usage versus having it on a mode that recirculates on regular time intervals, such as with traditional tank water heaters, ensures the pump doesn’t run during off-times when hot water is not being used.
- Increasing longevity of the unit, as the unit is not actively working during periods when hot water is not in use, the appliance is reducing the strain put on itself, allowing the unit to function for a longer timeframe.
Smart technology provides customers with the options they need to control recirculation, benefiting the customer and the building professional in terms of reduced labor and time needed for installation. To learn more about Rinnai’s RE Series, featuring Smart-Circ Intelligent Recirculation technology, visit www.rinnai.us.
Latest from NAHBNow
Oct 16, 2025
NAHB Endorses Dignity Act to Modernize America’s Immigration SystemNAHB supports comprehensive immigration reform legislation recently introduced in the House by Reps. Maria Salazar (R-Fla.) and Veronica Escobar (D-Texas) that would protect the nation’s borders and preserve critical workforces.
Oct 16, 2025
Amid Market Challenges, Builder Expectations Rise in OctoberBuilder confidence in the market for newly built single-family homes was 37 in October, up five points from September and the highest reading since April, according to the NAHB/Wells Fargo Housing Market Index (HMI) released today.
Latest Economic News
Oct 14, 2025
Custom Home Building Share Declines in 2024In 2024, 17.5% of all new single-family homes started were custom homes. This share decreased from 18.8% in 2023 and from 20.4% in 2022, according to data tabulated from the Census Bureau’s Survey of Construction (SOC).
Oct 13, 2025
Hispanics Comprise Nearly One-Third of the Construction Labor ForceDiversifying the construction labor force remains a key priority amid persistent skilled labor shortages. According to the 2023 American Community Survey, non-Hispanic White workers still account for the majority of the construction industry at 57%. Hispanic workers now represent nearly one-third of the labor force at 32%, followed by non-Hispanic Black workers at 5% and non-Hispanic Asian workers at 1.8%.
Oct 10, 2025
Vinyl Surpasses Stucco as Most Used Principal Exterior Wall MaterialIn 2024, vinyl siding was the most used principal exterior wall material for homes started. It holds just over a quarter share of homes, slightly surpassing stucco for the first time since 2018.