Fan-forced convector. Quiet operation, integral filters and thermostat connections. Can use Female Adapter (p/n 6679) or Push-fit Fitting (p/n 606) for connection. 1/2" fittings and on-off-thermostat switch. Fan speed (cfm) - 71. Output up to 7,000 Btu/hr. 24-Volt Thermostat (p/n 588 or 8200008) is optional.