Between Room Ventilator

  • Photo of right side and front of between room vent
  • Side angle of between room vent
  • The between room vent disassembled into its two pieces

The Between Room Ventilator (BRV) is a low-cost solution to common air pressure problems in American homes with HVAC systems. The BRV requires minimal installation and effectively equalizes pressure between rooms in a house. Balanced air pressure is necessary to achieve optimal performance in woodstoves and fireplaces.

The problem with unbalanced air

When the heat comes on in your house, a significant quantity of air is pushed and pulled throughout the house. Ideally, equal amounts of air should be delivered into and out of each room. Most houses do not have supply and return ducts in each room, however. For example, a bedroom typically only has a supply duct, relying on the door to allow air to flow back to a return duct in a hallway.

If anything impedes the airflow, such as a closed door with insufficient clearance underneath, then the return air duct must exert excess pressure on the rest of the house to make up for the poor circulation. This negative pressure can cause fireplaces, stoves, furnaces and other appliances to fail to ignite or exhaust properly.

A simple, low-cost solution

The BRV acts as a passageway to reconnect isolated rooms to the return air duct, much like an open door, but with the benefit of blocking the transmission of sound and light between rooms. With air flowing freely throughout your house, you avoid creating unbalanced air pressure, facilitating efficient performance from your fireplace or heating stove.

The path to balanced air pressure

The BRV has a pair of 6 inch square wall grills connected by a 4 inch round duct, which telescopes to accommodate varying wall thicknesses. The duct has cleverly-designed acoustical foam partitions to deaden sound transmission and completely block light, while still allowing air to flow freely between rooms. The BRV is typically installed over an interior door. Installation takes only a few minutes to complete. If desired, the polymer louvers can be painted with any latex paint to match wall colors.

Betweeen Room Ventilator price order
Between Room Ventilator $33

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What our customers are saying:

"After installing one of these, I'm ordering two more for my other bedrooms. They work great if you have 1-2 central air vents in a space and find that your door gaps aren't sufficient to allow for air return. Overall, these are a great option and installation takes about 20 minutes."
Ian T Baltutis - Burlington, North Carolina