Table of Contents
What is transfer air grille?
A transfer grille is a grille or register installed in the wall or above the door to connect the closed room with an open space such as a hallway or living room, thereby providing an additional pathway for stale air to reach the centrally located return. Transfer grilles may be installed by the framer or drywaller.
What is the purpose of a transfer duct?
Transfer air grill is basically an air outlet in the ceiling or wall for letting the air in or out from the closed area. Air Duct is normally used in ventilating, heating and air conditioning system to pass the heated or cooled air throughout the specific area.
What role does a grille play in an HVAC system?
A grille is a vent cover through which air is blown into or out of a room for circulation back to the central heating or cooling unit. These are commonly found if you have heating or central air conditioning. A grille has no damper to control air flow, so air is left to flow freely.
What is a jumper air duct?
A jump duct is a short piece of insulated flex duct (typically 10-inch-diameter duct) installed in the attic and attached to ceiling registers in the closed room and a common space to provide a return air pathway between the two areas. Jump ducts may be installed by the HVAC installer.
What happens if there is not enough return air?
If there is not enough return air available, your HVAC system will not heat or cool properly. If not enough air is brought back, your HVAC system will not be able to keep up with temperature demands. In some cases, two returns may be necessary to provide enough return air.
What are fire dampers used for?
The fire damper secures the integrity of the existing barrier thus preventing fire penetration before temperatures reach the fire rating level of the barrier itself. Its primary function is to prevent the passage of fire from one side to the other of a fire-rated separation.
What is the difference between grill and Grille?
Grill: a grated metal cooking utensil (noun); to cook over direct heat (verb). Grille: a network of metal, wooden, or plastic bars that acts as a barrier or screen.
Where is return duct?
Return air vents are generally located near the center of the homes. Older and newer homes often have one register per floor, but homes built from 1960-1990 may have a cold return air vent in each room.
How large should return air duct be?
A typical supply vent is 4 by 10 to 12 inches and a typical return vent is 16 by 20 inches or larger. Houses often have two or more return collecting points, each with a filter, which join before re-entering the heating unit.