MODINE
Fan Delay Timer 24V
The NBK-21055 Fan Delay Timer 24V provides precise control over blower fan operation in HVAC and greenhouse heating systems. By delaying fan startup and extending post-burn operation, it ensures the heat exchanger reaches optimal temperature before air circulation beginsenhancing energy efficiency and protecting system components from premature wear.
Key Features:
Optimized Blower Operation: Delays fan start-up until the heat exchanger is warm, preventing cold air discharge
Energy Efficient: Keeps blower running briefly after burner shutdown to use remaining heat
OEM-Equivalent Performance: Matches factory specifications for smooth replacement and dependable operation
Compact 24V Design: Integrates seamlessly with most standard heating control circuits
Specifications:
SKU: 21055
Category: HVAC / Fan Delay Timer
Description: NBK-21055 Fan Delay Timer 24V
Voltage: 24V
Equivalent To:
Modine 4034110
Modine 5H0730350000
5H73035
5H71627
5H71627B
3H32722
5H602054
5H602054-1
Why Replace Your Fan Delay Timer:
A worn or defective delay timer can cause inefficient heating, short cycling, or premature blower wear. Installing a new NBK-21055 restores proper timing, ensures warm air delivery, and improves both energy efficiency and comfort.










