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  • Tamarack Return Air Pathway Retrofit 14 inch by 8 inch - TTi-RAPR14.8

    Product ID • TAMRAPR14800

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When a building is conditioned by a forced air system, the air flows from and back to the air handler. By design, the flow should be balanced as it moved through the system. It is common practice to put a supply outlet in each room and use centralized returns, assuming that the rooms themselves will serve as the return ducts. In this situation, room doors can become dampers, blocking the return flow. 

Pressure imbalances are developed in the building when air from the supply register of a forced air system is obstructed from reaching the return register. The pressure differences seek to balance themselves by leaking through available cracks and holes. The out-of-balance condition will reduce the efficiency of the system, reduce the comfort in the space, and worse, cause moisture to condense in the wall system, enhancing the growth of mold and mildew and will eventually cause breakdown of building materials.

Ideally, there should be a return in every room, by passing the role of the rooms as return ducts. If that is not possible, undercutting the doors provides some relief, but this is usually insufficient. Adding R.A.P.'s will reduce cold and hot spots, allow the system to work more efficiently, and balance the pressure in the building to reduce the chance of inadvertent leakage.

The R.A.P. systems provide the superior balancing characteristics of a simple through-the-wall penetration, while reducing the problems of light and noise transmission. The baffle in the R.A.P. smoothes the flow of air, straightening the turbulent paths. But because light and sound travel best in a straight line, only the most direct light and sound sources move easily through the pathways and privacy is greatly enhanced.

The system will be effective regardless of position, providing it is placed in a wall that separates an air supply and return duct. Placement must be given consideration to benefit from noise and light reduction properties. A variety of sizes are offered to allow R.A.P.'s to be installed above the door or installed in inside walls.

Tamarack TTi-RAPR14.8 comes with 2 white grilles.

What size R.A.P. is best for your application?

Determine the amount of air being delivered to the room through the HVAC supply vent. Select the combination R.A.P. and door gap that will match the flow of air delivered.

Example: 177 cfm is being delivered. There is a 1" gap under a 30" wide door (50 cfm). The R.A.P. you would need would be 14.8 (127 cfm). 50 + 127 cfm = 177 cfm.

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Technical Specs

Tamarack Return Air Pathway 2 piece - TTi-RAPR14.8 Techs and Specs

  • Opening
    14 by 8 Inches
  • Grille Color
  • With Flange
    16 by 10 Inches
  • Grill
    15 3/4 by 9 3/4 Inches
  • Depth between the flanges
    3 1/2 Inches
  • Overall Depth
    4.625 Inches

Tamarack Return Air Pathway 2 piece - TTi-RAPR14.8 Features

  • Easy Installation
  • Each unit comes with a pair of white grilles
  • All models include a sheet rock flange
  • Increase Energy Efficiency
  • Reduce Transfer of Sound & Light
  • Reduce Structural Damage
  • Five Year Warranty
  • Made in the USA