It depends on the frequency and type of cooking that is performed. Normally, every three (3) to six (6) months is recommended for replacing the charcoal filters. Some charcoal filters are designed with an indicator mechanism that will change color as a signal to replace the filter.

CFM stands for Cubic Feet per Minute of exhausting air flow. The higher the number, the greater the amount of air that is exhausted using the Range Hood. A Sone is an internationally recognized unit of loudness. Sones are a linear measure like inches. Doubling the Sone value is equivalent to doubling the loudness. To get a sense of what one Sone represents, one Sone is equivalent to the sound of a quiet refrigerator in a quiet kitchen.

The exhaust duct must be all liquid tight welded 16 gauge mild steel or 16 gauge galvanized steel, in accordance with local codes. The ductwork must maintain the specified code clearance from the construction of the building, the wall area behind and adjacent to the hood, the ceiling and area above the ceiling to the roof. Ductwork must be sized for the amount of exhausted air and within the range code dictated air velocity, or speed.

Range hoods should be ducted to the outside of the home. While non-ducted filters trap some of the grease and odors from normal cooking, the humidity, smoke and heat will all be recirculated back into the home. If the non-ducted filters are not regularly replaced, eventually the grease and odor catching effect will no longer protect your home from impurities. High BTU gas cooking equipment should always be ducted to the outside of the home.

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.

internationally recognized measurement of sound output. Sones translate decibel ratings into numbers that correspond to the way people sense loudness. Ventilating fan sound levels are measured in sones.

The first AMCA tests back in 1989 were performed using the AMCA 210 standard. This was not the best method for testing PPV blowers because it did not take into consideration that the blower is placed away from the entrance opening. In 1995, AMCA developed the latest test standard, AMCA 240-96, with the assistance of a committee of PPV manufacturers. The new standard was a more effective measure of a blower’s performance and the test results were around 30% more than with AMCA 210 test.

Yes! The range hood needs to be pre-fitted and fixing points need to be installed or marked out, also pre-fitting of ducting or marking out is necessary. The coloured glass gets installed first and then the range hood canopy.

BTU rating is important if you are going to install a properly sized A/C unit to cool a certain well insulated area. CFM is important if you are going to install a properly sized large 110-volt Evaporative Cooler on the roof or in the side wall of a well insulated building so you can build up a negative pressure within a certain area so you can cool the entire area. Negative pressure cannot typically be built up in an area by using the limited resources of a 12-volt Portable Cooling Device.

A Sone is a measurement of sound in terms of comfortable hearing level for an average listener.The lower the sone value, the more comfortable the listening environment. Sones are not decibels or volume, but rather how sound is "sensed." One sone is the equivalent of a quiet refrigerator.

No. Range hoods are specifically designed to handle grease and high temperature environments. Ventilation provided by NuTone fans is only a supplement for odor and moisture removal in the kitchen.

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.

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.

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

Ducted ventilation uses fans to move air through metal tubes or ducts and allows you to direct the air where you want it, to hide the equipment away and usually to reduce noise and draughts. It can also allow you to heat and cool the supply air so that you can bring in warm air in winter and cool in summer – a major benefit. The technology is slightly different from wall or window fans (unitary fans).

an unblocked hat shape looking like an upside down bucket, used for deeper crown and narrow brim styles

Yes, regulations allow agencies to grant non-GS employees (except for members of the Senior Executive Service) rating-based awards if the employees - Career members of the Senior Executive Service are eligible for performance bonuses under the authority of 5 U.S.C. 5384 and 5 CFR 534.405.

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.

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.