What size supply duct for 3 ton unit

Using the chart, you'll see that for a 12" round flex duct, maximum CFM is 480 CFM or 500 CFM depending on the friction rate. Duct size for 115 CFM. Find the CFM closest to 115 in the table above. It will be found in different columns depending on the friction rate. If there isn't an exact match, go up to the duct size.

The right size of return duct for a 3.5 ton AC is 22 X 22 inches. In the case of a 4 ton AC, it’s 24 X 24 inches. And for a 5 ton AC, the correct size is 27 X 27 inches. Calculate the return duct size. And multiply AC tonnage by 3.14 for round and 144 square inches. This is for rectangular ducts. Now, we have all the answers and calculations ...System Size (Tons): 3. System Size (Tons): 4. System Size (Tons): 5. System Size (Tons): 2. MRCOOL. MRCOOL ROYALTON 4 5 1 3 Residential Commercial/Residential. 26 products in Central Air Conditioners. Sort By ... Commercial/Residential 3.5-Ton 17600-BTU 14-Seer Central Air Conditioner. Find My Store.What size should the trunk duct be for a 2 ton ac system? Updated: 9/19/2023. Wiki User. ∙ 13y ago. Best Answer. 14" Round or 14" x 12" Rec. will work.What Size Supply Duct For a 4 Ton Unit When it comes to HVAC systems, the size and design of the supply ducts play a crucial role in ensuring proper airflow and efficient cooling or heating of a building. If you have a 4-ton unit, it is essential to select the appropriate size supply ducts…I'm having a new AC unit and furnace installed, and I have a question about the duct sizes. I had a manual J performed, and they recommended a five ton AC unit. My existing duct is horizontal 12"x27" at the beginning, then it bends upwards and transitions to a 12"x 24". There is ten inch roudn duct shooting off inbetween. This seems small to me for a 5 ton.

†11/2 ton [5.3 kW] through 5 ton [17.6 kW] models are between 421/2 to 551/2 inches [1080 to 1410 mm] ... † Supply duct flanges provided as standard on air handler cabinet. ... appropriate unit size, voltage and number of electric heaters to be used. Make sure external static applied to unit allows oper-For a three-ton unit, you will require an 18″ round air duct size for your ductwork. If you intend to use a rectangular air duct, you need a ductwork size of 16″x15″ to 40″x7″. The ductwork size plays an essential role in the efficiency of your HVAC unit.To accommodate the air flow rate of a 5-ton unit, the standard ductwork size estimate according to shape is as follows: Round shape (diameter): 16.8". 16.9". Rectangular shape (H x W): 10" x 25". 12" x 20". 15" x 16". Duct sizing is a complex process greatly influenced by many factors.Apr 2015. Posts. 6. Post Likes. Plenum for a Goodman 2.5 ton, 14 SEER. Hello, I just have a general question, more or less, regarding the size my plenum needs to be. For my AC unit being installed in the attic (which will lie on its side) and and have the dimensions as such: Height - 53" Depth - 16 3/8" Width - 17 1/2 ", what size plenum should ...The air quantity (mass flow rate) required to satisfy the room load may be calculated from the following equation: RSH = m * Cp * ΔT. In volumetric terms air flow rate in cubic feet per minute (CFM) is estimated below: For air at ρ = 0.075 lbm/ft3 and Cp = 0.24. RSH = 0.075 * 0.24 * CFM x ΔT / 60.NFPA 72 also states that a duct smoke detector is not allowed to replace an area smoke detector, mainly because if the air-handling unit (AHU) is not running, the detector would not detect smoke. Therefore, duct smoke detectors are typically considered mechanical equipment devices instead of life safety devices.

30 Sept 2022 ... WHAT SIZE IS MY DUCTWORK? #ductwork #hvac ... 3 Things HVAC Contractors Don't Want You To Know About. ... Air Duct Calculation explained. Able ...What size duct do I need for a 12×12 room? ... How many CFM is a 5 ton unit? For a rough estimation, a 5-ton unit might require around 2000 CFM (400 CFM per ton). ... How big should a supply vent be? Supply vent size depends on factors like room size and required airflow. Common sizes include 4×10 or 6×10 inches.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.". 20 x 25 x 2 = 1000. "Wow," said the tech, "I will have to start making some changes to my installs.". "Don't just take my word for it" said Rick. "Start using your manometer and check your external static pressure and ...The return duct size of 16 inches is insufficient for a 3-ton AC. A 3-ton AC should have a return duct 18 inches in diameter. For a 3-ton AC, a 16-inch return duct is too small. Ducts that are too small will increase static pressure, which will cause too much noise when air passes through the AC. The heating unit will be overworked because ...3 Ton 17.2 SEER2 High Efficiency Goodman Air Conditioner Condenser. Model: GSXC703610. $2,869.00. 3 Ton 19 SEER Variable Speed ACiQ Air Conditioner Condenser. Model: HVA936GKA. $5,400.00 $4,320.00. Show per page. Choosing the right air conditioner size ensures a home has adequate cooling and your HVAC system is running efficiently.We are replacing a gas pack that is currently a 2 ton Trane and going with a goodman 2.5 ton unit. The air supply and return lines (tubes) under the house both say 14" on them. Was told by a contractor over the phone that based on my s.f. (1380 s.f.), that the 2 ton is undersized. It runs forever during the summer and the house really never heats up …

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Duct Cfg: Vertical Supply / Vertical Return Medium Heat Standard One Stage Cooling Models Dimensions (ft. in.) & Weight (lb.) *** ... Return Air Filter Size: 16 x 25 x 2 Unit Configuration Direct Drive - EcoBlue - High Static Al/Cu - Al/Cu ... Unit Feature Sheet for 5 Ton RTU 208-3 Project: ~Untitled1 09/19/2020 Prepared By: 12:13PMThe existing rigid supply ducts will remain and the 16" flex return will too(I hope) which brings me to the question. ... Let alone that each one of these companies has quoted a different size AC units. 3 ton, 3 1/2 ton, 4 ton. The two of the companies have agreed on a 2 1/2 ton on the second floor zone (1100 sqft). ...They're dominating the wireless headphone market. In just about seven months, Apple appears to have completely upended the wireless headphone market. Since the start of the year, o...The trunk flex duct that I would choose for a 3-ton system is 18" diameter minimum. (This is 9x9x3.1415=254.5 square inches/144 sq in per sq ft=1.77 sq feet. The 3-ton needs at least 400 Cu ft per min per ton or 1200 cfm of airflow. 1200 cfm/1.77 sq ft=679 fpm velocity. A 20-inch trunk duct would drop the velocity and friction even more.

You will need a 1.5 ton to 5.0 ton unit, either an AC for cooling along with a furnace or a heat pump that will both heat and cool. If your split system includes central air and a gas furnace, the furnace size will range from 45,000 to 135,000 BTU. Choosing the proper size equipment, a process known as “sizing” your HVAC system, is ...What size of return duct do I need for a 3Ton HVAC air-handler. Answered in 4 minutes by: HVAC Technician: HVAC Guru. Hello, Typically a 16X20 would be fairly standard for most applications on a 3 ton unit. However if you want superior air flow I would highly suggest putting in a 20X20 as that gives you far better airflow hands down.Chiltrix FirstCo 20VMB 5 Ton Duct System Hydronic Air Handler. General Features: Upflow or horizontal. Supply air 24 inches front to back and 22 inches wide. Return air 26-1/2 inches front to back and 21-1/4 inches wide. Factory installed coil. Convertible horizontal drain pan. Two 14 inch x 24 inch x 1 inch filters.In April 2024 the cost to Install Ductwork starts at $13.24 - $15.84 per linear foot. Use our Cost Calculator for cost estimate examples customized to the location, size and options of your project. To estimate costs for your project: 1. Set Project Zip Code Enter the Zip Code for the location where labor is hired and materials purchased.Let's say we have a 3-ton air handler/blower. You only have room for one big return duct due to limited space. This duct has two 90° angles, and is 35′ stretched out. For every 90° angle, add 5′. For every 10′ go up to the next sized flex ( 12″ to 14″). You have 1500 CFM to return back to your air handler/blower.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 34×8 rectangular returns ducts.We are having 3ton heat pump installed to replace a 2 1/2 ton A/C. Contractor is in presently installing new return duct. Original duct started at a 20x24 ceiling grille and ran through several elbows to air handler suction. It was mostly 20x24. New duct starts after first original 20x24 elbow but then reduces immediately to 10x18. This runs about 16ft and then through an elbow into air ...For a three-ton unit, you will require an 18″ round air duct size for your ductwork. If you intend to use a rectangular air duct, you need a ductwork size of …The return grill size would be 24x30. The run would be approximately 10-15 feet. Thanks! In many cases 18" will be large enough. But I can't see how its being installed in your home to know for sure. However, a 24x30 return grille is not large enough for a 4 ton unit.We would like to show you a description here but the site won't allow us.

Pull the airflow vertically to hit the friction loss line at 0.1 in.wg. Then, pull the line diagonally to the right and find the suitable duct diameter. 14″ round duct is less than ideal because the friction loss will be greater than 0.1 in.wg as the maximum airflow for 14″ round ducts is around 1027 cfm.

14. Shorten the ducts by not putting supplies at the perimeter. This one goes with step 9. You don't need to put the ducts at the perimeter in new homes because we have much better windows. You can shorten the overall duct length and total effective length by not running the supply ducts out to the perimeter.2 Jul 2021 ... ... Duct Crimper: https://amzn.to/2TxE1pT Klein ... 3:11 Jumper Ducts & Transfer Grilles 4:48 Central Return Air Option 6:00 Supply ... ton 11:30 ...A common rule of thumb for HVAC duct sizing is to have around 400 CFM per ton of cooling capacity. So, for a 5-ton unit, you would aim for 2000 CFM. How many CFM does a 3-inch pipe use?The line set run will be 85 feet. I beliieve I should install a 1 1/8 suction line for the 3 ton unit. At least I believe if I install a new 16+ SEER system with a 85 ft run it will rrequire a 1 1/8 inch suction line. Since copper is so expensive I was hoping to reuse it when I switched from R-22 to R410A with the new system.The return grill size would be 24x30. The run would be approximately 10-15 feet. Thanks! In many cases 18" will be large enough. But I can't see how its being installed in your home to know for sure. However, a 24x30 return grille …Rectangular or square ducting comes in standard sizes ranging from 3 inches by 7 inches to 35 inches by 40 inches. Sizing is based on airflow needs per cubic foot per minute, as well as velocity. The HVAC model that you're interested in should offer information regarding the maximum airflow per cubic foot per minute, or CFM, to help you ...The supply duct may gain or lose heat from the surroundings. Most energy codes require that the supply duct be insulated, which is usually good practice regardless of code requirements. ... a " 50 ton unit" or a ... Reduced size of ducts reduces space required for distribution ductwork and shafts.Duct Connection There to be a minimum of a 12" straight duct off of the supply duct with no size reduction and then a limitation of no more than a 45⁰ transition for the next 24", this is to insure proper performance of the heaters. ... 16-25 and 30 ton units are equipped conform to all applicable governing codes. with one condensate ...However, "when sizing duct systems," I always like to go "450-cfm per ton of cooling through the A-Coil." Also, I would size for 450 because for Heat pumps 450-cfm per ton is required. For 1125-cfm, 201-sq.in. duct area (16" Rd duct) Velocity would be 806-fpm, faster than I want, FR per 100 feet 0.07". I thought I answered this question before.

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The duct for this system must be sized by using 6 square inches of clear duct area for each 1000 BTU of cooling. Each ton of cooling contains 12,000 BTU. Multiply the tonnage, 3.5, by the total BTU per ton and this will give you the total BTU rating. 3.5 x 12000 = 42000. Multiply 6 x 42 to determine the duct size of 252 square inches The clear ...That means that a 100,000 BTU furnace requires 7 standard-sized cold air return vents (with cold air return grilles, of course). Note: The exact calculations are made with the help of manuals by the Air Conditioning Contractors Association. Those have charts for specific vent sizes, pressures, and allowed airflows.Apr 17, 2020 · Forum Rules. I currently have a 3 ton with 16 inch metal return duct work. I was told this by a contractor: 3 ton heat pumps with the new r410a refrigerant recommended size is 18" on the return duct. Otherwise you should expect issues with your system typically in winter time. I wanted to verify with you guys since the cost of upsizing the ... The existing rigid supply ducts will remain and the 16" flex return will too(I hope) which brings me to the question. ... Let alone that each one of these companies has quoted a different size AC units. 3 ton, 3 1/2 ton, 4 ton. The two of the companies have agreed on a 2 1/2 ton on the second floor zone (1100 sqft). ...Then you could easily figure what size filter you need for that CFM of airflow to get say 300 ft./m of airflow velocity through a new filter, being that it is the fiberglass filter. We will say in the cooling mode you want to flow 1250 CFM of air volume for a 3 ton AC or heat pump through the system; 1250÷300 is 4.1666 ft.² of free air area ...To accommodate the air flow rate of a 5-ton unit, the standard ductwork size estimate according to shape is as follows: Round shape (diameter): 16.8". 16.9". Rectangular shape (H x W): 10" x 25". 12" x 20". 15" x 16". Duct sizing is a complex process greatly influenced by many factors.The Model KPO12-43 (nominal 12-ton or 135,000 BTU) is the most versatile unit in size and capacity in The KPO Series, KwiKool's Indoor/Outdoor Line of portables. ... 2-12" flanges for supply duct and 2-12" flange for return duct: Maximum Duct length: 75' each for supply and return. Condenser: Fan Type (Centrifugal) Belt Drive:The return grilles and supply diffusers were standard issue size of 2 X 2 for a drop down ceiling. One of the things we uncovered as we were testing these units in the heating cycle was that the return grille temperatures were quickly climbing to over 90˚ while the room temperatures were only 70˚ and very uncomfortable.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.”. 20 x 25 x 2 = 1000. “Wow,” said the tech, “I will have to start making some changes to my installs.”. “Don’t just take my word for it” said Rick. “Start using your manometer and check your external static pressure and ...We would like to show you a description here but the site won't allow us.Based on the standard requirements for a 3-ton AC, you should get a return grille size that provides a minimum of 600 square inches. When manually measuring your return grille, take note of the general rule that you should have 200 square inches per ton. So, if you have a 3-ton unit, you should calculate for a grille with 600 square inches.2 Nominal heating capacities are based on the following conditions: Return air temperature: 70°FDB. Outdoor temperature: 47°FDB, 43°FWB Equivalent ref. piping: 25ft (Horizontal) 3 Capacities are net, including a deduction for cooling (an addition for heating) for indoor fan motor heat. ….

For most systems, the minimum duct size (see Table 1) is sufficient for up to 25 feet (8 m) with no more than three 90° bends. How many CFM is a 3 ton unit? 1200 CFM. 350 to 400 CFM per ton of cooling is required for proper air conditioning system operation. For example, if you are checking a 3 ton system, the airflow required is …20 Feb 2021 ... How to Repair a Frozen Air Conditioner ... Before you buy, know the right AC square footage per ton! ... 3 HVAC Ductwork ISSUES Homeowners NEED To ...For example, if your heat load is 150K BTUs, and maximum residential Central AC size is 60K BTUs (5 Ton) then you need two 60K BTU compressors and a 30K (2.5 Ton) system. The calculator's algorithm will select the full size system(s) and the smallest needed system to cover the rest of required BTU load, to give you most cost efficient estimate.Installation Figure 34. Cooling and gas/electric —10 tons high Figure 36. 4 to 6 ton high efficiency units, 6(074)-8.5 efficiency— horizontal airflow, supply and (Microchannel) high efficiency units and 6 to 10 return ton standard efficiency units - down flow supply and return air openings w/ through- the- base utilities 3 7/8"...When our technicians talk about tonnage, it means how much heat an air conditioner can remove from a home in one hour, which we measure in BTUs (British Thermal Units). An air conditioner that is one ton is able to remove 12,000 BTUs of heat per hour. Each ton is an additional 12,000 BTUs.Sep 22, 2023 · The rectangular return duct size for a 2-ton AC unit ranges from 182 square inches to 216 square inches, while the circular return duct size is 14 in diameter. For the same AC unit, rectangular ducts of different widths are acceptable as long as their total square inches are approximately equal. In most cases, the required CFM per ton is 400 ... The duct for this system must be sized by using 6 square inches of clear duct area for each 1000 BTU of cooling. Each ton of cooling contains 12,000 BTU. Multiply the tonnage, 3.5, by the total BTU per ton and this will give you the total BTU rating. 3.5 x 12000 = 42000. Multiply 6 x 42 to determine the duct size of 252 square inches The clear ...Multiply it by 144 to get the grille size in square inches and choose your preferred grille size based on that. For instance, 400 cfm ÷ 350 x 144 = 164.57 sq.in. So, the possible grille sizes are 20×8 (160 sq.in), 16×10 (160 sq.in) or 14×12 (168 sq.in) depending on your duct size. The above way is based on the grille sizing formula which: What size supply duct for 3 ton unit, The unit is a "Nordyne" model GB3BM-024K-AB, 2.5 ton,unit on first floor, same as old unit and plenty for this house. There is about 24-25 ft. of line. I took the temp about 10 inches above the coil. Return air flow is good, best on the first floor right next to the blower. Line sizes: Old line, 5/8 and 1/4 Unit line, 3/4 and 3/8, Feb 27, 2017 · 2 ton does not give you 1000cfm. 2 ton gives you 800 cfm. Also, you need to tell us if you're measuring your return duct by inside measurements or outside measurements. Yes, I understand that 2 ton gives me 800 cfm. The picture just shows that my 12x16 gives me 1000cfm (sufficient for my units' return, maybe). , Size of Your Home. Generally, the size of your home determines how many vents you will need per room. If your room is larger than 100 square feet, you will need more than one vent (at least two) to really get adequate airflow to the room. If the room is smaller, you only need one. Our favorite tip: Divide the number of air vents that you have ..., 3 Tons 14 SEER, 90,000 BTU 81% AFUE. The ACiQ PGS436090KGP0G has a cooling output of 3 tons, and a heating input of 90,000 BTU. When running the air conditioner on this unit, the unit's electrical efficiency is rated at 14 SEER, the standard efficiency on the market today. On the heating side of the unit, the gas efficiency is rated at 81% AFUE ..., 23 Nov 2022 ... Are more STAGES on an air conditioner worth it?? ... How to Design Duct Work for a 3 Ton Air Conditioning system ... How I Add Refrigerant to an Air ..., Air handler closet dimensions: Minimum of 30"W x 49.5"H x 32"D for small units and 39"W x 60.5"H x 36"D. Furnace closet dimensions: Minimum 26"W x 40"H x 42"D for small furnaces and 37"W x 46"H x 41"D for large furnaces. Of course, those are minimum dimensions, and the closet can be much larger. But these AC, furnace or ..., This is the 25 degree angled 2" plastic supply air outlet. Used in vaulted ceilings to direct the air straight down. ... It can deliver up to 9 tons of air conditioning in the same space as a 3-ton traditional unit. Technical Specifications: Duct Size: 2.0: Matching Duct Type: Sound Attenuator: Material: Glass-Filled Polypropylene: Duct ..., The right size of return duct for a 3.5 ton AC is 22 X 22 inches. In the case of a 4 ton AC, it's 24 X 24 inches. And for a 5 ton AC, the correct size is 27 X 27 inches. Calculate the return duct size. And multiply AC tonnage by 3.14 for round and 144 square inches. This is for rectangular ducts., Because you can make significant improvements at or near the equipment. So our company runs into a lot of issues associated with return ducts, or lack of them. In this article, I'll focus on three ways DiFilippo's solves return obstacles in basements. Figure 1: Enlarge the Return Drop., 23 Nov 2022 ... Are more STAGES on an air conditioner worth it?? ... How to Design Duct Work for a 3 Ton Air Conditioning system ... How I Add Refrigerant to an Air ..., A 3 Ton air conditioner is typically necessary for homes up to 1,500 to 2,500 square feet. Other factors such as climate, home insulation, and number of windows can also influence the right air conditioner size for your home, so be advised that this is just a general example. For a slightly smaller home you might want to consider a 2.5 ton unit., The return grill size would be 24x30. The run would be approximately 10-15 feet. Thanks! In many cases 18" will be large enough. But I can't see how its being installed in your home to know for sure. However, a 24x30 return grille is not large enough for a 4 ton unit., Qty. $133.00. 8 Kilowatt 23,800 BTU Goodman Heater Coil View Item. Add To Cart. Qty. $127.00. Designed with an enhanced comfort in mind, the ARUF37C14 air handler lives up to Goodman's expectations to be efficient and inexpensive, ready to heat and cool your home when paired with a condenser whenever you need it., Using a .1" external static resistance for the duct-work and guessing that you have a 3 ton A/C system that requires 1200 CFM of air flow, I would estimate that the 8"X20" duct is almost fully utilized as is the 8"X8" duct. ... If you have more than 3 tons of A/C adding ducts to the 8X20 duct may not be feasible. - d.george. Dec 27, 2017 at ..., The supply duct may gain or lose heat from the surroundings. Most energy codes require that the supply duct be insulated, which is usually good practice regardless of code requirements. ... a " 50 ton unit" or a ... Reduced size of ducts reduces space required for distribution ductwork and shafts., 24 Apr 2018 ... I replaced the 2 ton carrier heat pump package unit with a 2 ton goodman an had a few questions on duct sizing ... Most will run at the same size ..., 30 Oct 2023 ... Are you considering upgrading to a variable speed heat pump, but you're unsure if your existing duct system can handle it?, Note: You may need an additional adapter collar for your size flex. Sheet Metal Adapters convert square supply/return to round. (Fits 2.0 Ton - 5.0 Ton, Medium and Large chassis Units) This listing is for the product only., Installation Figure 34. Cooling and gas/electric —10 tons high Figure 36. 4 to 6 ton high efficiency units, 6(074)-8.5 efficiency— horizontal airflow, supply and (Microchannel) high efficiency units and 6 to 10 return ton standard efficiency units - down flow supply and return air openings w/ through- the- base utilities 3 7/8"..., 12" 12" 24" 0" Supply Air Return Air Figure 3. Minimum Unit Clearances Figure 4. Return and Supply Air Fittings Installing Return & Supply Air Fittings The supply and return fi ttings are included with 2. Overlap the collar ends keeping the small the unit and located in the supply duct. Page 7: Locating & Installing The Supply Dampers, Oct 10, 2023 · To accommodate the air flow rate of a 5-ton unit, the standard ductwork size estimate according to shape is as follows: Round shape (diameter): 16.8". 16.9". Rectangular shape (H x W): 10" x 25". 12" x 20". 15" x 16". Duct sizing is a complex process greatly influenced by many factors. , To calculate air conditioner size, multiply the length of the room by the width of the room to get the square footage of the room. Then, multiply the square footage by 25-50 btu/hr.sqft according to the application to obtain the cooling capacity needed., HVAC system prices can have a $2,800.00 difference in cost depending on the tonnage you need. A 2-ton HVAC replacement cost around $7,134.17, while a 5-ton HVAC unit cost will run closer to $9,906.57. The below grid will help give you a better idea of the cost to replace an HVAC system based on the size and type you need., This unit is one of the lightest, most compact packaged units ever designed. It's light weight (230 lb [104 kg]) for the 024 size) makes the unit easier to handle. The low height keeps ductwork connections to a minimum and makes units less visible. This unit utilizes a structural beam design to form the four sides of the cabinet., thermostat's call with the zone dampers in the ducts and the HVAC Unit. In some instances a by-pass damper or duct maybe required to relieve excess air when smaller zone(s) are the only ones calling. ... zones depending upon the size of the building. Most commonly a home is at least 2 zones, those being the living room, kitchen on one zone ..., 2 Jul 2021 ... ... Duct Crimper: https://amzn.to/2TxE1pT Klein ... 3:11 Jumper Ducts & Transfer Grilles 4:48 Central Return Air Option 6:00 Supply ... ton 11:30 ..., For the 3-ton, the CFM is 1200, given that 1 ton is equal to 400 CFMs. If this is the system you have, you should use a return and supply vent that matches the size of the AC in terms of the CFM it supports. If you use a small air filter than the system requires, you may also have a problem due to system cracks., Apr 2015. Posts. 6. Post Likes. Plenum for a Goodman 2.5 ton, 14 SEER. Hello, I just have a general question, more or less, regarding the size my plenum needs to be. For my AC unit being installed in the attic (which will lie on its side) and and have the dimensions as such: Height - 53" Depth - 16 3/8" Width - 17 1/2 ", what size plenum should ..., Rectangular sheet metal duct = .07" on most metal duct calculators. 2900. 40x12. 100 31/2 x14 2200 38x10 220 31/2 x30 2350 40x10. Rectangular sheet metal duct = .07" on most metal duct calculators. 3050. 42x12., Step 3. Use the online duct calculator (see References) and calculate the needed flex duct size. Select the duct type on the pull down menu. Input the required CFM in the box below that. Click "calculate" and you will see the size of flex duct you need for that room. The flex duct size may be different than the hard duct that runs to that room., Air Flow 6,000 cfm @ 5" ESP Voltage 460 V / 3 phase / 60 hertz Supply Air Duct (3) 20" Disconnect Size Return Air Duct NA - Louvered Inlet Connection Filter Size (3) 24"x24"x2" Cables Circuits / Compressors 1 / 1 FLA / MCA Cooling 100 / 125 amps ... Unit Arrangement - Dimensions are Approximate 0040 TAC 40 Ó2021 Carrier. All Rights ..., Using the chart, you’ll see that for a 12” round flex duct, maximum CFM is 480 CFM or 500 CFM depending on the friction rate. Duct size for 115 CFM. Find the CFM closest to 115 in the table above. It will be found in different columns depending on the friction rate. If there isn’t an exact match, go up to the duct size., Electric Heat (Unit Size Allowed) Sensors A Cabinet Options. 5190086-YTG-H-0220 ... through the base of the unit. For horizontal duct, remove the supply and return air panels on the rear of the unit. ... Electric) 3-5 ton units with no factory installed economizer