RTB – Round Take-Off By-Pass Damper
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- Technical Documents
The Round Take-Off By-Pass Damper, Model RTB, combines a barometric by-pass damper into a round take-off fitting for easy installation and mounting to any duct or plenum. The combination saves space and allows a by-pass to be added into many short spaces between the supply and return plenums.
The RTB features a mounting flange with and adhesive seal to seal tight against any duct surface to eliminate any air leakage and meet all duct leakage standards.
To simply install, cut a round hole the diameter of the RTB. Peel of the paper strip on the back of the flange and center and place over the opening of the round hole. The adhesive backing will hold the by-pass in place and if metal duct is used, sheet metal screws can be used to secure the RTB to the duct. The RTB must be sized to handle the amount of CFM that maintains a constant volume of air through the HVAC System. To determine this size required use ZONEFIRST’s By-Pass Calculator or Design Guide.