Duct System Design Basics
Duct systems are designed to properly distribute air throughout a building. Ducts that are not well designed result in discomfort, high energy costs, bad air quality, and increased noise levels.

Choosing the right-sized duct is critical to maintain proper air flow in the system.

Below is a simple model for determining duct sizes. The model applies to system up to 60 feet from unit to register. Because of the complexity of designing duct systems, we highly recommend using the ACCA “Manual D” for sizing ductwork, or consulting a professional HVAC contractor. Refer to the links on the left for more information.

Determine your duct size based on the required CFM (cubic feet per minute).

The model assumes 0.1 FPM (friction rate per 100 feet of duct) for supply and return, and an average number of fittings. For one or two long branch lines, we suggest one size larger branch pipe.

First week of 2012

Well this has been a great week to start off the New Year. I am really looking forward to what is to come economically this next year. My job is transforming into a new being in several different ways. The projects that we have lined out are exciting in each of their individual way. So let me break it down for you.

Teamed up with Ralph Larson & Son, Inc we are currently working on Smithwick Theater located On the Campus of Foothill College in Los Altos Hills, Ca. This being that it is “rock throwing distance” from Stanford University, in my book; it can be considered the most pristine Community College that I have ever experienced. The beautiful campus sets an inspiring tone, and makes working there, a sense of magnitude for our craft. Being that it is a theater, it adds a different dynamic to the HVAC scope of work. Your primary hurdles change rank. Layout of registers and duct becomes different due to the eccentric shape of theaters, sloping floors with immovable seating, and noise constraints to say the least.

In coordination with Cahill Contractors on San Mateo Performing Arts Center is indeed exciting. Monarch attended a coordination meeting with Live BIM. It is great to see collaboration amongst trade and to see the technology implemented in such an amazing way. Monarch is truly excited to take this project and run with it.

And last but not least for this week’s update is Laney College in Oakland. This beastly 9 story building will be no match for our team. We are excited for this hydronic Fan Coil system to be up and running. Stay tuned to see how it really all goes down.

More jobs and more updates to come. Hope to receive some input and experience from all of you reading.

Yours Truly

Ryan “The Sheet Metal Kid” Murray