What is the relationship between CFM and PSI?
What is the relationship between CFM and PSI?
PSI measures pressure, while CFM measures volume. PSI and CFM are often used as performance specifications for air compressors. Together, they indicate the maximum air volume and pressure produced by an air compressor to power air tools.
How many CFM do I need per BTU?
This airflow rule is applied to determine furnace airflow for three types of furnaces. Condensing furnaces require 150 cfm per 10, 000 Btu input. Induced draft furnaces require 130 cfm per 10,000 Btu input, and natural draft furnaces require 100 cfm per 10, 000 Btu input.
How many CFM is a 5 ton unit?
In our opening statement we quoted a rule-of-thumb about air conditioning requiring 400 CFM per ton. This value is usually the basis for rating self-contained air conditioners. Thus, we have a 2-ton unit handling 800 CFM, a 3-ton 1,200, a 5-ton 2,000, a 10-ton 4,000, etc.
How many CFM can a 6 duct handle?
100 CFM
What size duct do I need for 2000 cfm?
Equivalent diameter for rectangular and circular ducts – air flows between 100 – 50000 cfm
| Air flow – q – (Cubic Feet per Minute, cfm) (m3/s) | Rectangular Duct Sizes (inches) (mm) x (mm) |
|---|---|
| 2000 (0.9) | 10 x 25 12 x 20 15 x 16 |
| 2500 (1.13) | 14 x 20 15 x 18 |
| 2800 (1.26) | 12 x 26 16 x 20 |
| 3300 (1.49) | 12 x 30 14 x 25 |
How many CFM is a 12 inch round duct?
2000 cfm
How do you calculate CFM for duct size?
CFM calculation requires the size of your HVAC unit in tons to be multiplied by 400 (the average output of an HVAC unit). The total must then be divided by the square footage of your house. The air flow from your system also depends on the rate of friction loss of ducts.
How do you calculate CFM of a duct?
To calculate Air Flow in Cubic Feet per Minute (CFM), determine the Flow Velocity in feet per minute, then multiply this figure by the Duct Cross Sectional Area.
How many CFM does a supply register need?
90 cfm