Fan Delay Timer 24V | NBK-21055

NBK-21055 – 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 begins—enhancing 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.