Signed & Sealed Drawings
Signed & Sealed Drawings

   One of the most difficult aspects of today’s construction industry is getting a building permit. This is particularly true of restaurants, where the hood and its fire suppression system require separate permitting. Because these items are life safety items, they are reviewed with particular scrutiny. Most architects and engineering firms do not provide enough detail on the plans with respect to the hood system to satisfy the local authorities having jurisdiction (AHJ). This results in frustrating rejections and resubmissions with fees and time delays.

   Air Flow Specialists has an experienced team of drafting technicians supervised by our licensed professional engineer. We have state of the art AutoCAD software and plotting capabilities. We can provide drawings in letter size up to 36”x48” full-size architectural pages. Because our team is in house, we have total control of the drawing and design process. We can turn projects around quickly and respond timely to any comments from the AHJ. Our familiarity with the codes and special requirements of local jurisdictions alerts the customer up front of any particular installation requirements and costs that may be encountered to meet code compliance, preventing back charges and costly rework and construction delays.

   A proper duct design results in an efficient system that properly drains grease and exhausts the necessary contaminants with the least noise and energy. An improper duct design results in higher noise, operating costs and maintenance costs for the life of the system. A poorly designed duct system with a 10% increase in static pressure requires a 21% increase in horsepower (and electrical costs) to achieve the same air flow. A poorly designed hood system requiring 10% more exhaust to achieve capture requires 33% more horsepower. On the flip side of the argument, if a hood and duct system is undersized for the contaminants being produced by the cooking equipment, it will not capture as designed and may require the customer to live with high noise and operating costs in order to keep the smoke out of the kitchen. A detailed plan of the installation insures the customer they will receive the results they expect, the local AHJ will approve the plans as quickly as possible, the finished system will comply with code, and the end product will work properly and efficiently and can be easily maintained.