CommentCommentCommentComment

For technical support call Ray Stewart toll free 877-430-0333

FREQUENTLY ASKED QUESTIONS

 

1. WILL PREMIUM AIR SYSTEMS HOODS MEET LOCAL CODES? 

 Premium Air Systems Hoods are listed per UL 710 and NSF standard #2, and are built in accordance with NFPA-96 regarding hood construction and insulated at the rear for clearances to combustibles.  Premium Air Hoods are built in accordance with national code requirements.  Local codes of reference above national code requirements may indicate additional issues regarding compliance, and if these are known at the time of your order, we will work with you to satisfy these requirements.  Verify with your builder/installer the construction of the wall area behind and adjacent to the hood, because wall construction will greatly affect how most codes deal with hood requirements.  We recommend that the area behind and adjacent to the hood be constructed of metal studs and cement fiberboard (such as durarock), which NFPA #96 for instance considers a limited combustible.  Walls constructed of drywall installed over wood studs are considered a combustible assembly, which alters the nature of the hood installation for insulation.  Advise Premium Air Systems of your particular job conditions.  Additionally, Premium Air Systems recommends that you discuss the installation with the local inspector and establish what is (or is not) acceptable in your area prior to placing your order. If questions arise in this discussion, feel free to call Premium Air Systems for advice.

 

2. CAN I PURCHASE A HOOD OTHER THAN THE FOOT INCREMENTS ON YOUR WEB SITE? 

 Yes! We do not stock hoods, as each one is custom built to order. If you need a hood 10’ 3 ¾” left-to-right, we can build that hood and delivery lead-time is the same as if it were a 10’ hood.

 

3. WHAT IS YOUR LEAD TIME?  

Premium Air Systems can usually ship your custom built equipment in 10 working days from receipt of order unless your hood requires specific parts which must be ordered (i.e. specific size fire damper for supply air). Very large orders with several hoods may take longer.

 

4. DO I NEED MAKE-UP AIR? 

Yes, but a separate make-up air unit may not be needed. HVAC equipment can bring in a percentage of outside air based on unit total air volume capacity for use as make-up air and depending on exhaust requirements and total HVAC air volume, there may already be plenty of make-up air capability existing in your building. If you do need make-up air Premium Air Systems manufactures a direct fired make-up air unit.

 

5. WHAT DO I NEED TO KNOW ABOUT MAKE-UP AIR UNITS? 

Premium Air Systems manufacture a natural gas direct fired make-up air unit that is UL listed and can be applied in various applications.  The unit may be roof mounted, installed on a slab adjacent to the building, or inside the building. We calibrate the unit up for your specific requirements (CFM and static pressure). Our small unit, the HV1001, can be ordered with a single-phase electrical power motor (the larger units require three-phase electrical power). The make-up air unit tempers, or warms outside air and distributes the air in the manner specified by you, either through a simple duct and diffuser system in the kitchen area, or through elaborate duct runs and multiple diffuser locations. During summer months, the heat function isn’t active and the unit introduces make-up air into the kitchen at the current temperature of the outside air.  If air-conditioned make-up air is desired, an option for a factory installed, integral unit is available.

 

6. HOW IS THE HOOD DUCTED? 

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. Clean-outs and direction fittings may be needed depending on how the duct is run.  For horizontal lengths of ductwork, a quarter inch per foot pitch must be maintained within the duct to prevent grease accumulation.  The duct must be welded into the hood and at all seams along with at the curb.  Premium Air Systems can provide ductwork for your specified duct layout requirements.

 

7. WHAT SIZE EXHAUST FAN DO I NEED?  

The amount of exhausted air, length of duct, and number of turns in the duct all effect the size exhaust fan needed. Call us and we will be happy to help is sizing the fan needed.

 

8. DOES PREMIUM AIR SYSTEMS MAKE ANYTHING ELSE?  

Sure! We manufacture custom stainless tables, shelves, etc. Premiums Air Systems will manufacture 16-gauge mild steel all welded duct and fittings for your hood.  We can provide stainless wall panels, either flat or quilted, for your cooking area walls. We build custom, give us a call or send us a fax; if we can build it…we will quote it.