The Rheos boiler/water heater combines 87-percent combustion efficiency with boiler modulation circuits that sense the heating demand and automatically adjust the boiler with the range of 1.2 to 2.4 MBtu. The high-density heat exchanger uses a double-row copper tube design to maximize the heating surface and create high-density heat transfer per square inch of floor space, the company says. The unit has a footprint of less than 34.5 inches. The manufacturer states that the small footprint and the sidewall venting allows for easy, flexible installation.

Laars Heating Systems, 6000 Condor Dr., Moorpark, CA 93021; 805-529-2000; 805-523-8990 (fax);

eProduct #195