This company has unveiled its new line of variable-speed air handlers, which expands its Echelon series of air conditioners, heat pumps and furnaces. The new variable-speed air handlers are built around a design that keeps water, mold and contaminants out. Featuring Rx technology, the unit's coil resists standing water and microbes with a MicroBlue coating. Its sloped drain pan with dual openings removes water more efficiently, according to the company. Rx technology also includes a cabinet design that reduces airflow system contaminants. Foil-faced insulation keeps fiberglass microbes out of the airflow.

Coleman, York Unitary Products Group, 5005 York Drive, Norman, OK 73069; (405) 364-4040;