High Efficiency Water Heaters

AERCO has been an industry leader in water heating design for 65 years ever since it developed the first on-demand, temperature-controlled water heater that didn’t need storage. In addition to the original B+II WaterWizard, AERCO offers a broad portfolio of indirect-fired, water-to-water and steam-to-water water heaters that provides you with a high efficiency system and instantaneous hot water across a wide variety of commercial applications from small multi-family housing to large hospitals, universities and five-star hotels.

Sizing Guidelines

  • Innovation, AM Series and SWDW U-Tube Double Wall selections should be performed using HeatSmart
  • SmartPlate selections should be made via the sizing tables found under Application and Sizing Guidelines section of the SmartPlate product page
  • B+II WaterWizard selections should be made by logging in and installing the desktop tool, HeatSmart II (1999)

For any questions on water heater sizing, please contact us at applications@aerco.com.


The Innovation is a high-efficiency tankless water heater that delivers instantaneous hot water with a compact footprint, energy savings and lower operating costs.

View Innovation

AM Series Water Heaters

AM Series high efficiency water heaters provide you with a powerful hot water system with built-in redundancy in a compact footprint.

View AM Series Water Heaters


 SmartPlate water heaters are specifically engineered to complement condensing boilers in low temperature applications to promote system-wide energy efficiency. 

View SmartPlate

Steam-To-Water Heaters

AERCO's line of steam-to-water heaters feature fully modulating steam input and a temperature-control design that is time-tested across a variety of applications.

View Steam-To-Water Heaters

Recon (KC Replacement)

The ReCon provides hot water on demand without the need for any storage and has been specifically developed as a KC1000 water heater replacement.

View Recon (KC Replacement)