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> 7" rc fields with collar hvac heating burner
7" rc fields with collar hvac heating burner
The Field draft regulators are all pre-assembled ready for installation. RC & B34 models are designed for oil or coal appliances with flue sizes from 4" to 10".MG1 is used for commercial gas fired furnaces and boilers with 4-8" flue sizes. M + MG2 is for gas, oil/gas, oil and coal-fired furnaces and boilers sized from 10" thru 25" with natural, induced or forced draft. Thermal type switch can be wired to operate an alarm in case of blocked flue or backdraft.