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Rugged Construction: Built with high-grade PCBs designed to withstand the thermal stresses of continuous furnace and AC operation
a separate bonnet kit (RK 800M4-B) would be required
preventing leaks and alignment issues
Precision Control: Maintains temperature within +/- 1 degree for consistent climate management
Thermal Management: Class F high-temperature insulation ensures stable performance during continuous duty cycles
Weil McLain 381-800-477 Vent Damper 340155-7026 Rugged Construction: Built with high-gradeWhen you are servicing gas fired systems, the Weil McLain 381 800 477 7 inch vent damper is the critical OEM component required to maintain proper draft and combustion efficiency. This automatic vent damper is the verified direct replacement for the legacy Weil McLain 510 512 347 model. Engineered specifically for boiler venting systems, this unit facilitates fuel savings by closing the flue during the off cycle to prevent standby heat loss, while
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