this component provides a calibrated 3-8" water column (WC) outlet pressure range

The Robertshaw 41-408 Hot Surface Ignitor is a high-performance silicon carbide furnace igniter engineered for precision in HVAC gas ignition systems

and switches must be transferred from the existing unit or purchased separately

Durable Construction: Engineered to resist diaphragm fatigue and electrical contact pitting for long-term cycling

Lennox 12J41 TXV R-407A this component provides a calibratedFor veteran technicians looking to restore factory spec refrigerant metering, the Lennox 12J41 TXV (also identified as model 103366 13) is the precise OEM solution for R 410A systems. This thermostatic expansion valve is engineered for 3 ton (and some 3. 5 ton) outdoor units, featuring a 3 8" ODM inlet and a 1 2" ODF outlet. Unlike standard non bleed valves, this unit includes a 5% bleed port, which assists in pressure equalization during the off