Wide Operating Range: Adjustable 5-28 inch water column range covers a broad spectrum of commercial burner and boiler specifications

This satisfies standard VA requirements for most HVAC control transformers without causing voltage drop issues

ensuring reliable circuit switching without the chattering common in generic alternatives

simplifying field installation and diagnostics

Internal check valves offer low pressure drop while maintaining 40-micron filtration efficiency

Fenwal 35-663904-113 Ignition Module Refrigerant Wide Operating Range: Adjustable 5-28The Fenwal 35 663904 113 Ignition Module is a microprocessor based 24VAC Hot Surface Ignition (HSI) control designed for precise timing and consistent performance in commercial and residential gas fired appliances. This Fenwal 35 66 series module integrates a built in inducer blower relay and pressure switch monitoring, streamlining the combustion sequence by managing the blower and verifying airflow before the trial for ignition (TFI) begins. With a