New AirMate Wall Poster

AirMate is offering a new Wall Poster. The poster can be ordered via the Online Literature Order System or it can be viewed by clicking here.

New & Improved - Airmate 1300 series

August 2009 - AirMate 1300 Series Lay-In Diffusers will go through a design improvement, effective immediately. This design improvement consists of a new 2 inch beaded collar, which will allow for easier flex duct connections and a uniquely designed back pan – which will yield better performance and improved air distribution.

As this is a running change, product numbers and pricing will remain the same.

We will indicate “New 2” Collar” directly on the carton to differentiate new from current inventory.

Below, you will find a list of models that are affected by this product design improvement.

1300 (6”-14”)
1300-INS (6”-14”)
1300-INS R6 (6”-14”)
1301 (6”-14”)
1301-INS (6”-14”)
1302 (6”-14”)
1302-INS (6”-14”)
1303 (6”-14”)
1303-INS (6”-14”)

To view the accompanying flier, click here.

Revised Carton Quantities

August 2009 - Selkirk has revised its carton quantities for the Airmate line of Grilles, Registers and Diffusers to better suit the needs and requests of our customers.

Click here to view the list of products with revised carton quantities.

ORDERING LITERATURE HAS NEVER BEEN EASIER

March, 2009 - Selkirk announces the introduction of our new Online Literature Order System for the US and Canada.

From our website @ http://www.selkirkcorp.com/ simply:

• Go to Online Tools and select the Online Literature Order System icon
• First time users will create a quick and easy profile
• Select the order form you plan to use (based on your market/Brand)
• Complete shipping information
• Select the literature you require and submit

You will receive a confirmation of your order through the eMail provided in your profile. Orders are processed within 24 hours direct from Selkirk’s literature supplier. You can either use the site directly or continue to go through Selkirk’s Customer Service Team.

If you have any questions or concerns, please contact your Selkirk Rep or our Customer Service Department at:

USA: 1.800.992.VENT (8368)

CDA: 1.888.SELKIRK (735.5475)

We firmly believe that Online Tools like this one help us achieve our goal of making Selkirk easy to do business with….. please feel free to let us know your thoughts or comments through info@selkirkcorp.com

Selkirk Corporation has been a leading manufacturer of chimney & venting for Hearth market for more than 80 years. Selkirk manufactures products in the United States, Canada and Mexico. For more information, visit the Selkirk web site at http://www.selkirkcorp.com/.

What are the Considerations when Sizing a Return?

Return air volume to the air handler (fan) must equal what is supplied from the airhandler, otherwise system performance will suffer. Not all the air that is returned may be from the occupied spaces. Some make-up air may be brought in from the outside. No matter the mix of indoor to outdoor return air, the fan needs to see the same volume coming in as it sends out. If the system requires 80% of the supply air volume to be returned through grilles, the amount of airflow through each depends on the number of each. A 2000 CFM system returning 80% will require a single filter grille to handle 1600 CFM, four return grilles to handle 400 CFM each, or some other combination.

The return air grilles or return air filter grilles should be unobtrusive during fan operation. This means paying attention to the face velocity whensizing these grilles so that humming or whistling noises do not occur. These noises are symptoms of face velocities that are too high. In filter grilles, this may also indicate that the velocity is higherthan the rating of the filters.

General recommendations for residential return grille maximum face velocities are about 600 Feet-per-Minute (FPM) for grilles and 400 FPM for filter grilles. These products usually have stamped louver faces (AirMate Model 170).

Special consideration must be given to master bedroom suites and home theater rooms where lower velocities may have to be considered to guarantee no noise. Assembled grilles (fixed bar)using heavier extruded aluminum will not share the humming noise with their stamped-face cousins, but can make airflow noises if thevelocity creeps up (AirMate Model E280). The room activity and background noise level will help dictate how high the face velocity may extend. A noisy cafeteria or busy lobby can afford higher velocities than executive offices or libraries.

Once a reasonable face velocity is determined for the type of grille being considered, use the performance data in the back of our catalog or from our web site to size the grille. Under “FaceVelocity” for the style grille being considered, go down that column until the CFM figure equals or slightly exceeds the volume flow rate necessary. Without benefit of the catalog, a rule of thumb is to plan for 2 CFM for each square inch of gross grille area. This rule will keep you within a safe face velocity.

A 20x20 grille has 400 square inches of gross area. If the “2 CFM/square inch” rule is used, 800 CFM is what the grille will handle with a low enough face velocity to avoid noise. For our AirMate 170 grille, using this method results in a face velocity of about 320 FPM. This rule is a little conservativefor grilles, but much closer for filter grille performance.

Welcome to the AirMate eNews Site

Visit here often for all the latest news and events related to our AirMate Brand of Grilles, Registers & Diffusers.