Here are a couple pictures of the finished plenum without the filter rack installed. As you can see, I have left a slot in the plenum ( 1 1/4" wide ) where the filter will slide in and out.
Next I have to fabricate the 1"x1"x1" channel pieces that will become the finished rack inside the plenum. The plenum is a basic 16" x 24", so I will need two 23 3/4" rails for the long sides and one 15 3/4" rail for the short side. Notice I have subtracted 1/4" from each rail. That is so the rails fit easily inside the plenum without any unneeded force, while allowing for movement in the plenum for easy installation on the job site. I have also cut some 45 degree notches on the 15 3/4" rail so that when the filter slides inside, it won't get caught on a bent corner of metal.
All that is left to do is rivet the sections of rail inside the plenum and the rack is installed. I usually start by installing the 23 1/4" sections first and then slide the 15 3/4" section down inside the other two rails. Now the customer can pick it up and install it on the job site. I have used some basic filter material in the picture to show how the filter would slide inside the plenum. I would not suggest using this as a filter for a homeowner. Buy some high quality filters that will last.
and 
are quickly becoming the norm when it comes to reading books and magazines instead of prior print editions. Well, the same goes for those bulky 
or 
device so you can keep more of them on hand without the stacks and mess of heavy print books. Now you can take them on the go when you need them on a job, a quote or to and from the office daily without breaking your back. Here is a list of some of the more popular HVAC manuals and books for your Kindle or e-reader.
presents a wealth of state-of-the-art HVAC design information and guidance, ranging from air distribution to piping systems to plant equipment. This popular reference has now been fully updated to reflect the construction industry's new single body of codes and standards. Featuring an outline format for ease of use, the Second Edition of this all-in-one sourcebook contains: * Updated HVAC codes and standards, including the 2006 International Building Code * Over 200 equations for everything from 
Here's a single-source reference that provides quick accurate answers to even the toughest HVAC questions! Portable, simple, well-illustrated and with just enough text to get the job done, HVAC Instant Answers provides fingertip access to the HVAC solutions needed to solve even the most difficult problem – in a flash. Packed with 
This handbook brings you solutions to virtually any problem in the field. Leading U.S. and international experts help you to create and maintain safe and healthy environments in structures from hospitals to residences, and handle a range of questions from health and comfort effects and physiologic thresholds to ventilation measurement and employee programs. For answers on instrumentation, contaminants, codes, and guidelines--for the solutions you need to assess, design, and maintain healthy and productive indoor environments, Indoor Air Quality Handbook is the one source to have. Assess Indoor Air Quality Complaints-Evaluation Methods-Risk Management and Communication Strategies-Critical Review of Sick Building Investigations -Indoor Concentration Data for Microbiologicals, Chemical Compounds, Particles, and Fibers *Understand Critical Issues-Health and Productivity Costs of Poor IAQ-Filtration, Air Cleaning, and the New ASHRAE Standards Design Healthy, Comfortable, and Functional Buildings-Application of Models and Advanced Techniques-Commissioning Buildings to Perform as Designed-IAQ in Schools, Hospitals, Sports Facilities, Office Buildings Apartments, and Transportation Vehicles
This third volume of Audel’s HVAC Library gives you a comprehensive, hands-on guide to installing, servicing, and repairing all basic air-conditioning systems in both new and older construction. You’ll also find complete coverage of specialized heating units–radiators, radiant heating systems, stoves, fireplaces, heat pumps, and indoor/outdoor pool heaters, plus fans, exhaust systems, air filters, and more. It’s what you need to complete your HVAC reference library. * Make accurate calculations for AC system output * Tailor AC systems for older construction * Learn to install and service today’s popular electronic air cleaners and filters * Service less common heating systems such as coal-fired furnaces * Install, maintain, and repair humidifiers and dehumidifers * Handle radiators, convectors, and baseboard heating units
to the ventilation system for a 
. This, in a sense is exacactly what we do and should be no problem. The issues for us were that the application was more commericail, with 18" spiral duct and a system (i.e. ventilation for a paint booth) that we were unfamiliar with. However, we knocked it out in a few hours, the job came out great and we went home paid and happy. All in all a good day for K & E Sheet Metal and a lesson that sometimes doing something you never tried can bring new 
