Hvac Return Air Grille Sizes

The air grille and vent cover selection from grainger includes steel metal and wood return air grilles and vent covers.

Hvac return air grille sizes.

The square root of 576 is 24. This is the required airflow through the return grille. Step 1 open up the cabinet of your furnace to gain access to the service plate. Return air ducting is necessary in almost every room.

Grilles the function of a grille is to pull air from a room to return it to the heating or cooling system. Particle diameter opening size. Made to order grilles and registers. First let s define some terms.

4 ton unit x 144 square inches 576 squared. We sell both stock size as well as custom made rectangular grilles and registers as well as stock round registers for both supply and exhaust applications. Therefore your return air duct and grill size will be 24 by 24 inches. All of our dayus grilles are cut to size aluminum construction rustproof and only 40 weight versus steel.

Hvac ductwork sizing is critical for proper heating and cooling in every room. Homes will either have multiple small grilles throughout or a single large grille installed in either ceilings or walls. Return a return draws air into a return duct system with negative pressure compared to the space usually via a fixed grille but. The total of the supply registers in the pressure zone equals 340 cfm.

The last step is to size the return grille and duct to match the total of the supply registers. Size the return grille and duct to remove 340 cfm from the pressure zone according to your favorite duct sizing. Air intakes and outlets ventilation systems air intakes and outlets rules of thumbs. The size of a grill the mechanical movement of air and the mathematics that govern the establishment of correct return air vents are determined by these organizations.

Ventilation systems for ventilation and air handling air change rates ducts and pressure drops charts and diagrams and more. Particle diameter strainers and filters mesh size vs. Proper sizing and orientation of grilles registers and diffusers may seem like such a simple thing but it s an area where confusion and mistakes are commonly made. It differs from a register because it does not have a damper to control airflow.

These ductwork tips will help balance your air conditioning and heating system. Find a decorative metal floor register that will match your home or office decor or go with a standard steel grille with white electro coated and powder coated finish. Installation standards and demands are adhered to in order to produce a standard of performance across the career field and ensure the professional installation of hvac systems. Have to get the air back to the furnace.