3 ton round duct size Do your own calculations and compare them to our chart or use the chart for quick accurate calculations for duct size based on CFM needed for a room One size is given for round ducts its diameter You have two or three options for rectangular ducts that give you the same or nearly the same square footage per duct
Find the ideal duct dimensions for your HVAC system with h2x s free Duct Size Calculator Maximise air flow efficiency in your designs Duct size or cross sectional area square feet Air volume in cfm can be calculated by multiplying the air velocity by the cross sectional area of the duct in square feet
3 ton round duct size
3 ton round duct size
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For a 3 ton unit we use 18 inch round returns ducts or 20 12 22 10 and 30 8 rectangular returns ducts These ducts can facilitate at least 1 200 CFM airflow For a 3 5 ton unit we use 20 inch round returns ducts or 22 22 26 10 and Duct Size for 850 1800 CFM High airflow rates such as 1200 CFM and 1600 CFM are common for 3 ton to 4 ton furnaces These CFMs require larger duct sizes in order to reduce the air velocity for noise control
The flex duct sizing chart and round duct sizing chart below are used by HVAC technicians handyman services and homeowners to quickly select a supply duct size and return air duct size for each section of your ductwork design A duct size calculator commonly known as a ductulator depends on factors like the size of the space you re heating or cooling air flow velocity friction loss and available static pressure of the HVAC system
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For a 3 Ton Unit you will require the following return air duct as a minimum Round Duct Size 18 Diameter Rectangular Duct Options 16 x15 17 x14 20 x12 23 x11 26 x10 29 x9 34 x8 40 x7 Grill Space 600 square inches Note These sizes can be split across multiple return air ducts Return air duct size for 1 5 ton ACs is 14 to 22 for round ducts and 13 x12 to 32 x12 for rectangular ducts Use the return air duct size calculator below for accurate dimensions required for your air conditioner or heat pump
To calculate the area and diameter of a duct follow these simple steps Enter the air flow rate in cubic feet per minute CFM Enter the desired velocity of the air in feet per minute FPM Click the Calculate button to see the result A good HVAC duct sizing rule of thumb is to measure rooms in your home the necessary airflow rates and friction loss rate Using these numbers you can calculate the appropriate HVAC duct size For example a one to AC system typically uses 10 inch ducts while a 4 ton AC system requires 18 inch ducts
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3 ton round duct size - Use our ductwork sizing and cost calculator to get the right duct size for your HVAC system Increase efficiency and save on utlitiy bills