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Return Duct Sizing Chart

Return Duct Sizing Chart - Installing cold air return in 2×4 wall (example) blocking cold air return vents in summer: Web supply return air air cfm cfm. Sl) load calcuation (heating & cooling) acca manual j. Then divide the answer by 12,000. Web return air duct size chart. Web using the return air duct size calculator simplifies the process of selecting an appropriate duct size based on the air conditioner’s capacity. Web in the case of a 4 ton ac, it’s 24 x 24 inches. Supply return air air cfm cfm. The size of the return air duct will depend on your air conditioning system’s size. And multiply ac tonnage by 3.14 for round and 144 square inches.

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Return Duct Size For 2, 2.5, 3, 3.5, 4 And 5 Ton Units

Look Up Your Air Handlers Model Number On Google, You Should Be Able To Find The Design Cfm.

Easy to use online ductulator / duct size calculator. Web a duct sizing chart relies foremost on the square footage of a home or office space—but, more importantly, the size of each individual room within the building. The size of the return air duct will depend on your air conditioning system’s size. For every 10′ go up to the next sized flex ( 12″ to 14″).

What Is The Duct Size For A 4 Ton Unit?

Diameter of duct x 3.14 = return air duct in square inches. Wxh wxh wxh wxh wxh wxh wxh wxh 80 6x6 7x5 9x4 90 7x6 8x5 10x4 100 7 8x6 9x5 11x4 125 7x7 9x6 11x5 13x4 150 8x7 9x6 12x5 15x4 175 8 8x8 9x7 10x6 13x5 17x4 4 tons) x 144 square inches = return air duct in square inches. You have 1500 cfm to return back to your air handler/blower.

“For The Same 2.5 Ton System With A Filter Grille, The Grille Size Would Need To Be What Size?” Asked Rick “We Usually Use A 20 X 20 For 2.5 Ton.” Said The Tech 20 X 20 X 2 = 800 “800 Cfm…Well That’s Big Enough For A 2 Ton, But A 20 X 25 May Be A Better Choice.”

The results are displayed in the results table. Installing cold air return in 2×4 wall (example) blocking cold air return vents in summer: Use the return air duct size calculator below for accurate dimensions required for your air conditioner or heat pump. Supply return air air cfm cfm.

What Return Duct Size Do I Need For A 2 Ton Unit?

Friction rate and ductwork length; And multiply ac tonnage by 3.14 for round and 144 square inches. You’ll see a model number. And for a 5 ton ac, the correct size is 27 x 27 inches.

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