The AYF is a high-efficiency, gas chiller-heater for applications that require both heating and cooling. The cooling section includes a GAX chiller with 30% greater efficiency over previous models, low NOX emissions, minimal maintenance, and longer life than conventional electric units, the manufacturer says. The heating section has an AFUE of 82%, incorporates a low-NOX burner releasing less than 20 ppm, and has solid-state controls, says the company. The unit is completely self-contained.

Robur Corp., 2300 Lynch Rd., Evansville, IN 47711-2951; 812-424-1800; 812-422-5117 (fax); (e-mail), (Web site).