Honeywell Electronic Fan Timer, 18-30Vac, Fixed or 45 Second Heat Fan On Delay, Adjustable, 60 Second, 90 Second, 120 Second, 150 Second Heat Fan Off Delay, Fixed 0 Second Cool Fan On Delay, Fixed 0 Second Cool Fan Off Delay, -40-150 Degree Ambient Temperature Range, Integrates Control of Burner and Circulating Fan Operations in an Oil Furnace