There is a great deal of confusing and misleading information being circulated as "airflow data." Sometimes the airflow is stated as "free air" or is given without reference to the static pressure (SP). Both ignore the flow restrictions imposed by vacuum hose, filters and other system components. Other published rates have never been tested or verified using established industry testing protocols.

A 4 cylinder engine requires about 1000 cfm (1700 m^3/h), a 6 cylinder engine requires 1700 cfm (2890 m^3/h) and a small V8 about 2100 cfm (3570 m^3/h). To reach the minimum cfm required you may need to install two or possibly more fans. See similar questions...

The CFM (Cubic Feet per Minute) is the measurement of how much air passes through the unit. For the HealthMate, the HealthMate+ , and the Allergy Machine™ the fan CFM is 400 cfm on high and 75cfm on low. The HealthMate Jr™ is 200 cfm on high and 50cfm on low. See similar questions...

It varies on wind speed but is equal or greater than the required exhaust vents on the market when used at the soffits. CFM is very hard to compare apples to apples because of all the different variables. Everything would need to be exactly the same for the tests: Outside and Inside Temp., Pressure, wind, same ridge vent, same shingles, same inside living space conditions, same sun rays, etc. etc. etc……..That is why we feel that the industry has chosen NFA to compare products. See similar questions...

Cubic feet per minute - a unit of measure used in air infiltration testing, e.g., "maximum .10 cfm per square foot of window area." See similar questions...

No. Filtration testing measures the percentage of dust retained before the filter reaches a terminal test pressure, often 10” of restriction above initial restriction. We use airflow as a simplified term to explain a more complicated physical process. The more precise description is restriction: K&N air filters create less restriction which helps an engine run better. An engine will only use the air it needs and our air filters do not result in an engine using more air than necessary. See similar questions...

No, an engine can only take in a fixed volume of air depending on the engine’s size. The more restriction that an air intake system (filter, air box, and tubing) causes, the greater the potential is for power and mileage degradation. See similar questions...

CFM stands for “Cubic Feet Per Minute”. It is a measure of the blower’s air movement performance. The CFM performance of all Tempest Blowers is tested and certified by a third party organization, Air Movement and Control Association, called AMCA. This ensures that our customers receive accurate performance information. See similar questions...

A complete listing of the CFM ratings for all Tempest blowers can be found on our web site. Go to the main page and click on the product link that says “Blowers”. This information is also available in the current Tempest product catalog and can be requested by calling Tempest Customer Service. See similar questions...

Certification is valid for three years. CFMs must demonstrate a continued commitment to growth and excellence by earning a required number of maintenance points in at least two of the following categories: See similar questions...

CFM stands for Cubic Feet per Minute. It is the amount of air which passes through the air line. The CFM rating indicates the amount of air required to operate your machinery. You can locate the CFM rating on the machines specification sheet or on the machine itself. See similar questions...

Answer: The notation CFM (Cubic Feet per Minute) refers to a volume of air produced by the air compressor at a given pressure or PSI (Pound per Square Inch) See similar questions...

It should be noted that the EWI4000s was designed with a semi-open airflow system. That is to say that unlike what your teachers may have taught you, you SHOULD let some air escape from the corners of your mouth when blowing into the EWI4000s. This type of system allows for far greater control over air flow by the player and feels exactly the same as blowing all the air through the horn. See similar questions...

With a charcoal grill, air circulation keeps the coals burning. Having the bottom vents open during preheating aids in starting the fire and in maintaining the heat. With a propane grill, leave the lid closed at all times, so the heat circulates around the food. See similar questions...

In some situations barbecue smoker users find that there is not enough airflow around the smoker to generate enough heat, or worse still, provide inconstency when cooking giving wildly varying results to the cooking. Many smoker users find that the best way to improve the performance of their barbecue smoker is by cutting away small sections of the smoker, or drilling holes in the right places. See similar questions...

The battery manufacture is responsible for determining the amount of gas that is needed to pass through the flame arrestor during a given period of time. This is determined by the size and design of the battery, and the size and thickness of the flame arrestor. Samples are available for testing and design purposes. See similar questions...

Yes, solar screens installed properly will not inhibit the operation of your window. However, some airflow will be restricted due to the thickness of the material. See similar questions...

A number of variables affect the CFM testing results conducted by AMCA. The distance the blower is set back away from the entrance. Engine rpm can vary up to 15% according to the manufacturer. The engineering of the impeller to a given engine horsepower and rpm in regards to the diameter of the blades, the number of blades, the pitch of the blades, and placement of the blades within the shroud are just a few of the factors that can influence the performance of the blower. See similar questions...

The Shadow, Shadow I and Shadow II will fill approximately 10,000 cubit feet in one minute. The difference is that the smoke from the Shadow will be less dense but the space will still have smoke. The smoke from the Shadow I will be denser and the Shadow II much denser. Rosco feels it is better to compare smoke machines by fluid throughput (fluid consumption), since there is no testing standard. See similar questions...