6 DRAFT CONTROL SERIES

When to use a draft control? Refer to our Contractor Reference Guide on when to use a draft control with a draft inducer/power venter, power burners, forced draft burners, dual fuel appliances and gas-fired appliances. The unit operates more efficiently, reliably, and requires less maintenance.

The velocity of combustion gases through the heat exchanger is slowed so more heat is extracted. Combustion of fuel is complete and the process is stabilized. Room temperature air enters through the barometric draft control in the precise amount needed to overcome the excess drafts caused by temperature variations, wind fluctuations, and barometric pressure changes. The pressure difference between the room air and heated gas (air) causes products of combustion to flow (draft) through the unit and rise through the breach and chimney. How do draft controls work? Static pressure of the cool air exerts pressure on the outside of the furnace or boiler, the breaching, and stack. 08″, this control is so sensitive that instrumentation should be used when adjusting the unit during installation. The Type RC is calibrated to allow for easy adjustment to the furnace or boiler manufacturer’s specifications. A barometric draft control can potentially lengthen and intensify any chimney fire by allowing an unlimited supply of combustion air.The Field Type RC oil draft control is furnished as standard equipment on many leading brands of oil or coal-fired heating equipment. Note: When used with woodstoves, the connector pipe and flue must be inspected and kept clean. tee with black finish barometric draft control. (These findings must be kept in perspective, as woodstoves operated at extremely slow burn rates can still produce dangerous levels of creosote, even when operated with a barometric damper.)īoth coal and wood stoves will benefit from the installation of a barometric draft control.īlack 24g. Research has also linked the use of barometric dampers with substantial creosote reduction in the operation of woodstoves. The automatic stabilizing effect on the fire will generally lengthen the duration of burn and maintain a more constant heat output.

6 DRAFT CONTROL SERIES

In cases of excessively strong draft, two barometric controls in series may be required. The draft control can only decrease draft, it has no ability to increase draft. They will do an excellent job of maintaining the draft setting within reasonably close tolerances except when the total draft in the chimney drops below the setting on the barometric draft control. As the flap opens (with greater draft), more air is let into the chimney, thereby decreasing the draft to the appliance.įield Barometric Draft Controls have adjustable weights which allow the units to be set for the particular draft required. A counterbalanced flap opens and shuts depending on the strength of the negative pressure (draft) in the chimney. It stabilizes the draft to any appliance located below the barometric draft control. Others seem to “hang up” at low draft settings, making them essentially inoperative. We’ve Examined A Lot Of Draft Controls, Some Cost More And Some Less, But The Field Barometric Draft Control Is The Best We’ve Found For Both Operation And Price.

6 draft control