Reznor 121275 Unit Heater Block Vent SwitchReznor 121275 Unit Heater Block Vent Switch is a precise replacement component for Reznor unit heaters. The block vent switch is designed for 275D models and fits a 36T X46 footprint to ensure a snug, problem free installation. In industrial HVAC applications, this block vent switch coordinates vent control with burner cycles, supporting safe startups and reliable shutdowns. Built as a robust Reznor heater part, it provides a dependable, standard

3/4 Inch Threaded Port Connection

the SV175 contributes to balanced flow and steady performance in heating and cooling applications

Emergency exposure limit 65 PSI

The Permanent Split Capacitor (PSC) design delivers reliable starting and consistent torque

The OEM Oil Equipment MFG 3150 is a robust Magnetic Unlocking Device designed for reliable security and quick access in demanding environments

This genuine replacement part fits Nordyne E2EH and E2EB blowers

built to fit standard 16 x 20 F100 and F200 media air cleaners

The Heil Quaker/ICP 1056363 Fan Contactor delivers reliable switching for fan motors and HVAC applications

Durable brass body resists corrosion and chemical exposure

enabling quick starts and dependable operation in gas-fired systems

making replacement straightforward for technicians

Wide compatibility with Goodman ASC130 family and related part numbers