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For contractors spec'ing out reliable flow control
Key Benefits for Technicians: Precise 0-5" WC Range: Optimized for low-pressure differential monitoring in ductwork and static reference points
more frequent changes may be required to prevent increased static pressure
Direct OEM Replacement: Replaces legacy part number SWT1403 and ensures correct fitment for specific Trane RAUCD and RAUCC models
Allanson Transformers 421-BT387 Transformer Els PW 17895 For contractors spec'ing out reliableThe Allanson 421 BT387 is a heavy duty ferromagnetic ignition transformer designed for constant duty service in high demand oil heating systems. As a universal service replacement, this 120V oil burner transformer delivers a consistent 10,000V secondary output at 23mA, ensuring a stable arc for reliable ignition in residential and commercial applications. Engineered with a mid point ground and a double pole configuration, the 421 BT387 features a