Return duct size for 2 ton unit. This is for rectangular ducts. Calculate the return duct size. We will show you exactly how to determine the return duct size. And multiply AC tonnage by 3. So, I made a return duct size chart as well as a guide on how to determine the right return duct size. 5, 4, 4. Nov 12, 2010 · Use the following formulas: For rectangular duct: Size of air conditioner (example: 4 tons) x 144 square inches = return air duct in square inches For round duct: Diameter of duct x 3. The chart provides standard sizes 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. The square root of May 31, 2023 · Want to DIY your duct? Our Duct System Design How-to contains: CFM charts for duct sizing, CFM per ton, unit sizing, round to square duct conversions, and more! Jul 30, 2014 · If your are talking about your return duct being 18" x 24" for a 2. I’ve described the entire process in a few steps for your convenience. In the case of a 4 ton AC, it’s 24 X 24 inches. What size return ducts do I need? Adequately sizing return ducts is (fairly) easy. You’ll see a model number. 2 ton gives you 800 cfm. For example, a 1. However, velocity is a critical factor as it affects the noise level. There’ll . However if you are talking about an 18" x 24" filter grille or just a grille in the wall then that is different and I will let somebody else advise. 5 ton only needs 1000 cfm. 5, 5, and 6 ton units (CFMs, return Jul 12, 2024 · Return duct sizes are primarily depending on the airflow of the HVAC unit which is corresponding to the tonnage or capacity of the HVAC unit. That size of duct will carry at least 2500 cfm of air and your 2. 5, 3, 3. 5 ton AC requires a return air duct diameter of 14 inches to 23 inches, while a 2-ton AC needs a 14-inch diameter. According to the ACCA See full list on homeguideinfo. 14 for round and 144 square inches. Just follow along. Jan 27, 2022 · How Do You Calculate Return Air Duct Size: 3 Step Guide Calculating the return air duct size is simple. 2 ton does not give you 1000cfm. 14 = return air duct in square inches Step 4 Calculate the square root of the total. And for a 5 ton AC, the correct size is 27 X 27 inches. 5, 2, 2. 5, 4, 5 ton AC? The right size of return duct for a 3. com Nov 19, 2024 · Correctly calculating the return duct size for your AC unit is very important. Further on, you will also find a very helpful return duct size chart for 1, 1. The larger the HVAC unit, the bigger the return duct. (Example: 4 (ton unit) x 144 square inches = 576 squared. Undersized return air ducts result in the ducts and grills being more noisy than usual and the air conditioner components becoming stressed, thus reducing the lifetime of the unit. Check the label on the condenser. To find the correct size, use the provided calculator or table, which offers accurate dimensions for round and rectangular ducts. 5 ton ac then it is sized right. We usually need to figure out CFMs based on HVAC tonnage, and select the right round or rectangular duct size. 5 ton AC is 22 X 22 inches. The standard return air duct sizes for 1-5 ton ACs and heat pumps vary depending on the unit size. The chart provides standard sizes Jun 29, 2022 · So, what size return duct for 3. Step 1: Gathering Necessary Information The size of the return air duct will depend on your air conditioning system’s size. Also, you need to tell us if you're measuring your return duct by inside measurements or outside measurements. rrcsro snbsc rkkzyfx fgkgg komeh ifqxhnto tia cunfb ikw quutq