When troubleshooting HVAC control circuit power

The Cleveland Controls AFS-305 is a high-performance differential pressure switch engineered for precise monitoring of air flow and pressure in commercial HVACR systems

Featuring a 45/30 degree temperature range and a standardized 1/2-inch diameter sensing face

always match the original L-rating exactly

Common Questions: Is the EK-304 compatible with POE oils

Field Controls 46198901 Control Els PW 17895 When troubleshooting HVAC control circuitThe Field Controls 46198901, specifically the Model 4" MG1, is a professional grade double acting barometric draft control designed for precise combustion stability in gas fired furnaces and boilers. Engineered for high efficiency venting systems, this 4 inch regulator stabilizes erratic automotive drafts caused by fluctuating outdoor temperatures and wind velocities. By maintaining a constant negative pressure between . 01" and . 1" water column