What Size Register For 9 Inch Duct
Nobody can properly size the ductworks without a duct sizing chart. HVAC duct sizing chart answers i elementary question:
"What size should my ducts be?"
The dimensions of ducts (be it flex, metal, round, or rectangular) determines the airflow (measured in CFM).
Instance: How many CFM does a half-dozen-inch duct have? A rectangular 6×6-inch duct has an airflow of 110 CFM. Bigger 6×12-inch ducts can handle 270 CFM airflow.
The bigger the crosssection of ducts, the bigger CFM ; that's pretty obvious.
The smallest vi×4 ducts can handle 60 CFM airflow. The biggest 42×12 ducts with 504 sq inch crosssection can handle 3000+ CFM airflow.
To figure out exactly how big ducts you need for central ac systems, we have prepared consummate CFM duct charts for all unlike kinds of ducts:
- Duct sizing nautical chart for flex ducts (round ducts with 5-xx inch bore).
- Duct sizing chart for metal ducts (round ducts with five-twenty inch bore).
- iv-inch rectangular CFM duct chart (from 6x4 to 24xfour duct sizes).
- vi-inch rectangular CFM duct chart (from 4x6 to 30x6 duct sizes).
- 8-inch rectangular CFM duct chart (from 4x8 to 36x8 duct sizes).
- 10-inch rectangular CFM duct chart (from 4x10 to 40x10 duct sizes).
- 12-inch rectangular CFM duct chart (from 4x12 to 42x12 duct sizes).
Yous can use these ASHRAE duct sizing charts if you're an HVAC technician or a DIY enthusiast:
CFM Sizing Nautical chart For Flex Circular Ducts (50-one,700 CFM)
| Duct Size (Inches) | Flex Duct Airflow (CFM) |
|---|---|
| 5 inches | 50 CFM |
| 6 inches | 75 CFM |
| 7 inches | 110 CFM |
| eight inches | 160 CFM |
| 9 inches | 225 CFM |
| 10 inches | 300 CFM |
| 12 inches | 480 CFM |
| 14 inches | 700 CFM |
| 16 inches | i,000 CFM |
| xviii inches | 1,300 CFM |
| twenty inches | 1,700 CFM |
A common question here is "What size duct is needed for 1000 CFM?". If you lot're using flex round ducts, yous demand ducts with a 16-inch bore.
Note: For everybody using metallic duct calculators, you should input Flex duct = .05″ to get an accurate adding.
If you are replacing rectangular ducts with round ducts, you will have to decide the equivalent bore of the round ducts. Yous tin can find the details almost rectangular to circular duct transformation hither.
CFM Sizing Chart For Metal Round Ducts (50-2,000 CFM)
| Duct Size (Inches) | Metal Duct Airflow (CFM) |
|---|---|
| five inches | 50 CFM |
| 6 inches | 85 CFM |
| 7 inches | 125 CFM |
| viii inches | 180 CFM |
| 9 inches | 240 CFM |
| 10 inches | 325 CFM |
| 12 inches | 525 CFM |
| fourteen inches | 750 CFM |
| 16 inches | 1,200 CFM |
| 18 inches | 1,500 CFM |
| 20 inches | 2,000 CFM |
You tin run across that, compared to flex ducts, metal ducts can handle more airflow. For example, 20-inch flex ductwork tin handle ane,700 CFM airflow while twenty-inch metal ductwork tin can handle 2,000 CFM airflow.
Note: For everybody using metal duct calculators, you should input Round metal piping = .06″ to get an authentic calculation.
Let's look at how much airflow rectangular-shapred ducts tin handle:
4-Inch Rectangular Ducts Size Chart (60-330 CFM)
| 4″ Duct | 4″ CFM |
|---|---|
| 6×4 | 60 CFM |
| 8×4 | 90 CFM |
| 10×4 | 120 CFM |
| 12×4 | 150 CFM |
| 14×4 | 180 CFM |
| 16×four | 210 CFM |
| eighteen×4 | 240 CFM |
| 20×iv | 270 CFM |
| 22×four | 300 CFM |
| 24×four | 330 CFM |
6-Inch Rectangular Ducts Size Chart (lx-775 CFM)
| 6″ Duct | half-dozen″ CFM |
|---|---|
| 4×6 | 60 CFM |
| six×half-dozen | 110 CFM |
| 8×6 | 160 CFM |
| ten×half dozen | 215 CFM |
| 12×6 | 270 CFM |
| 14×half dozen | 320 CFM |
| 16×6 | 375 CFM |
| xviii×half-dozen | 430 CFM |
| xx×6 | 490 CFM |
| 22×6 | 540 CFM |
| 24×six | 600 CFM |
| 26×6 | 650 CFM |
| 28×half dozen | 710 CFM |
| 30×6 | 775 CFM |
8-Inch Rectangular Ducts Size Chart (ninety-one,500 CFM)
| half dozen″ Duct | 6″ CFM |
|---|---|
| 4×8 | ninety CFM |
| 6×viii | 160 CFM |
| 8×viii | 230 CFM |
| ten×8 | 310 CFM |
| 12×8 | 400 CFM |
| 14×8 | 490 CFM |
| xvi×viii | 580 CFM |
| eighteen×viii | 670 CFM |
| 20×eight | 750 CFM |
| 22×8 | 840 CFM |
| 24×8 | 930 CFM |
| 26×8 | 1,020 CFM |
| 28×8 | i,100 CFM |
| thirty×viii | 1,200 CFM |
| 32×eight | 1,300 CFM |
| 34×eight | 1,400 CFM |
| 36×eight | ane,500 CFM |
10-Inch Rectangular Ducts Size Chart (120-2,350 CFM)
| 10″ Duct | 10″ CFM |
|---|---|
| 4×10 | 120 CFM |
| 6×10 | 215 CFM |
| 8×10 | 310 CFM |
| x×10 | 430 CFM |
| 12×10 | 550 CFM |
| 14×10 | 670 CFM |
| 16×x | 800 CFM |
| 18×ten | 930 CFM |
| xx×10 | one,060 CFM |
| 22×10 | 1,200 CFM |
| 24×x | i,320 CFM |
| 26×10 | i,430 CFM |
| 28×10 | 1,550 CFM |
| 30×ten | 1,670 CFM |
| 32×10 | i,800 CFM |
| 34×10 | i,930 CFM |
| 36×ten | ii,060 CFM |
| 38×ten | 2,200 CFM |
| 40×10 | 2,350 CFM |
12-Inch Rectangular Ducts Size Chart (150-3,050 CFM)
| 12″ Duct | 12″ CFM |
|---|---|
| 4×12 | 150 CFM |
| 6×12 | 270 CFM |
| 8×12 | 400 CFM |
| x×12 | 550 CFM |
| 12×12 | 680 CFM |
| xiv×12 | 800 CFM |
| xvi×12 | 950 CFM |
| 18×12 | 1,100 CFM |
| xx×12 | ane,250 CFM |
| 22×12 | i,400 CFM |
| 24×12 | ane,600 CFM |
| 26×12 | 1,750 CFM |
| 28×12 | i,950 CFM |
| 30×12 | 2,150 CFM |
| 32×12 | 2,300 CFM |
| 34×12 | 2,450 CFM |
| 36×12 | ii,600 CFM |
| 38×12 | 2,750 CFM |
| 40×12 | 2,900 CFM |
| 42×12 | 3,050 CFM |
All in all, it'south of import to understand what size ducts you need to properly plan the ductwork. You can likewise check more than information almost CFM and duct sizing in the ASHRAE duct fitting database.
If yous're interested in how speedily the air is moving in your ducts, you tin can apply these two duct velocity calculators. On top of that, if you have the airflow numbers expressed in SCFM (Standard Cubic Anxiety Per Minute), yous can check this SCFM to CFM conversion.
Source: https://learnmetrics.com/cfm-duct-sizing-chart/
Posted by: deleonhicurang63.blogspot.com
0 Response to "What Size Register For 9 Inch Duct"
Post a Comment