or air within a range of 3 to 21 inches water column (wc)

or 90 minutes to match specific regional climate demands

Contractors should verify displacement specs (2

The 6-16" WC spring range (dark green spring) provides the flexibility needed for standard low-pressure requirements

which is critical for maximizing SEER ratings and managing sensible heat ratios

Utica-Dunkirk 28687 Flame Sensor 322055-301 or air within a rangeThe Utica Dunkirk 28687 Flame Sensor is a critical safety component engineered for precise flame rectification in high efficiency residential and commercial gas fired boilers and furnaces. Designed for compatibility with various Utica and Dunkirk heating systems, this OEM replacement flame sensor monitors the burner assembly's combustion process by converting AC voltage into a measurable DC microamp signal. A veteran tech knows that a reliable