To replace large decommissioned or aging energy recovery ventilation (ERV) wheels, Airxchange FA Series field-assembled cassettes are said to significantly reduce installation times and costs. Cassettes (wheels and frames) are factory-built, tested, marked for reassembly, and then disassembled for shipment. On-site assembly and installation are fast and easy, typically taking one day, says the company. And because Airxchange wheels recycle up to 80 percent of heating and cooling energy contained in exhaust air, payback is quick.

Airxchange, 85 Longwater Drive, Rockland MA 02370, 781-871-4816; 781-871-3029 (fax); www.airxchange.com