Highlights of the MG1 Draft Control for Gas Appliances
- SAFE: Maintains the boiler’s draft to burn fuel more efficiently
- EASY INSTALLATION: Collar included to ensure a safe, snug fit
- EFFICIENT: Adjust air flow rate to produce a steady, safe, and efficient flame without the risk of backdrafting
Features of the MG1 Gas Draft Controls
A double-acting control for gas-fired furnaces and boilers is widely used for conversion burner installations, gas draft-induced appliance operation with mechanical draft inducers, or sidewall power venters. It is also recommended for use on gas atmospheric appliances where a draft hood cannot be installed, and can improve combustion stability and draft on many gas atmospheric installations with venting problems. The MG-1 provides precise, accurate control of drafts at levels higher than permitted by a standard draft diverter, which is a frequent requirement with gas. Because it is double-acting, it opens out to relieve positive vent system pressures as low as .01″. Draft adjustments using weights are simple and accurate from .01″ to .1″.
How it Works
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. 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. 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. Combustion of fuel is complete and the process is stabilized. The velocity of combustion gases through the heat exchanger is slowed so more heat is extracted. The unit operates more efficiently, reliably, and requires less maintenance.
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 MG1 Gas Draft Control should be installed by a licensed contractor. Find a contractor in your area.
Specifications of the MG1 Gas Draft Control
|Model||Part Number||Control Size||Nominal Capacity Sq. In.||Recommended Pipe Sizes (in.)||Dimensions (inches)|
|4" MG1||46198901||4||12.6||3 - 4||9 1⁄2 to 12 1⁄2||4||2 1⁄2||2||2 5⁄16||4 9⁄16||1 1⁄2||1⁄4||2 1⁄2||1⁄2||1 1⁄4||3⁄8||7|
|5" MG1||46210701||5||19.6||4 - 5||12 1⁄2 to 15 3⁄4||5||2 1⁄2||2||2 5⁄16||5 9⁄16||2||5⁄8||2 1⁄2||1⁄2||1 1⁄4||1⁄2||7|
|6" MG1||02724001||6||28.3||5 - 6||15 3⁄4 to 19||6||2 11⁄16||3||3 1⁄4||6 5⁄8||2 1⁄8||13⁄16||2 3⁄4||3⁄4||1 3⁄4||5⁄8||8 7⁄16|
|7" MG1||01804401||7||38.5||6 - 7||19 to 22||7||3 3⁄8||3 1⁄2||3 3⁄4||7 5⁄8||2 3⁄8||1 1⁄8||2 3⁄4||3⁄4||2||1⁄4||9 5⁄8|
|8" MG1||01986501||8||50.3||7 - 8||22 to 25 1⁄4||8||4 3⁄8||4||3 3⁄8||8 11⁄16||3||1 1⁄2||2 5⁄8||3⁄4||2 1⁄4||3⁄8||11|
|9" MG1||02715901||9||63.6||8 - 9||25 1⁄4 to 28 1⁄4||9||5 1⁄8||4 1⁄2||3 3⁄4||9 11⁄16||3 1⁄2||1 3⁄4||2 5⁄8||3⁄4||2 1⁄2||3⁄8||12 1⁄4|
Draft Control Certifications
cUL and CSA listed for oil and solid fuel heating equipment
2630 Airport Road
Kinston, NC 28504