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cfm is less than cmh by by 40% (approximately)
Wiki User
∙ 11y ago
864 cfm (cubic feet per minute) represents air flow in terms of volume of air measured in cubic feet, whereas 864 cmh (cubic meters per hour) is air flow measured in cubic meters over an hour. The conversion factor from cfm to cmh is approximately 1 cfm = 1.7 cmh, so 864 cfm would have more air flow than 864 cmh due to the difference in volume units.
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What are cfm?
CFM stands for cubic feet per minute, which is a unit of measurement used to quantify the volume of air that a fan or blower can move in a minute. It is commonly used in ventilation, air conditioning, and heating systems to describe the flow rate of air. A higher CFM rating indicates that the device can move a greater volume of air in a given time period.
What does the CFM number on a ventilation fan mean?
CFM stands for cubic feet per minute, which is a measurement of the amount of air that the fan can move within one minute. It indicates the fan's airflow capacity, with a higher CFM number indicating a more powerful fan that can move more air. It is important to consider the CFM rating when choosing a ventilation fan to ensure it can adequately ventilate the space.
How many BTU's are in a CFM?
BTU is a measure of energy, while CFM (cubic feet per minute) is a measure of airflow. There is no direct conversion between the two because they measure different things. BTU is used to quantify heat energy, while CFM measures the volume of air flow.
How can you convert btu to cfm?
To convert BTU (British Thermal Units) to CFM (Cubic Feet per Minute), you need to know the specific heat of the material being heated or cooled. The formula to convert is: CFM = (BTU/hr) / ((Temperature rise in °F) x (Specific heat of material)).
How do you calculate condensate flow from ac units?
To calculate condensate flow from AC units, you can use the formula: Condensate flow rate = Air flow rate x Moisture content of air x Condensation efficiency. You will need to know the air flow rate in cfm (cubic feet per minute), the moisture content of the air in grains per pound, and the condensation efficiency of the unit. This formula will give you the volume of condensate produced per unit of time.
How much air flow in cfm's comes from a typical 20 inch box fan?
~ 1000 cfm
What does air flow meter do?
Measures the amount of air to flow past the meter in cubic feet (CFM) or meters (CMM) per minute.
What is air flow rate for 100 hp gas engine?
300 cfm should do it.
Is it better to have more or less cfm's when choosing a fan?
It is better to have more. CFM stands for Cubic Feet per Minute. The higher the CFM's, the more air it moves.
What does air-conditioning abbreviation 'cfm' means?
cfm stands for cubic feet per minute - this is a term that describes the amount of air flow in duct work - it takes approximately 400 cubic feet per minute air flow per ton of air conditioning
What are cfm?
CFM stands for cubic feet per minute, which is a unit of measurement used to quantify the volume of air that a fan or blower can move in a minute. It is commonly used in ventilation, air conditioning, and heating systems to describe the flow rate of air. A higher CFM rating indicates that the device can move a greater volume of air in a given time period.
How do you check the cfm of diffuser?
Check the air flow per cubic meter of your diffuser area cover in your unit. CFM= cubic feet per minutes.
How many cfm of air flow per square ft of office space?
For better comfort you should go with 1.5 cfm per sq foot. Depending on how many windows and solar gain, you can increase the cfm.
What should you use Ahu or Fcu if you have to deliver 5000 cfm air flow in a single room?
AFU
What is the generally accepted range for evaporator air flow in CF Ms per ton of residential air conditioning?
400 CFM
How do you calculatethe cooling coiling of air handling unit?
If you are talking about the forced air furnace that is in the basement or attic you would need to find the amount of air flow from your air handler (CFM) For every 400 CFM you would need about 1 ton of cooling or 12000 BTU For instance my air handler is 1200 CFM therefore i could handle 3 tons easily. This is a rule of thumb but remember that if your air filter is dirty your air flow will be decreased and could cause possible freezing of the cooling coil or evaporator coil.
How does an air cleaner affect the volumetric efficency of an engine?
If the filter is to small or dirty this would restrict the air flow, lowering the CFM available.
