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Up The Commercial Kitchen Ventilation Hood Type I Stack: No Problems Or Complaints

August 27, 2012

By John Clark, P.E.

One Comment

Leakage caused by modern cleaning techniques, evolving codes, increased airflow requirements ... kitchen ventilation design has become more complicated than the old sizing and design challenges. Of course, they’re still around, too. Grease is the word, so review these tips to keep it from popping up in the wrong places.

Case in Point

Fan terminals elevate raised-floor office project

August 22, 2012

No Comments

Critchfield Mechanical, Inc. an HVAC engineering firm in Menlo Park, CA needed a cost-effective and energy-efficient perimeter zone ventilation solution.

HVAC Security Emergencies: No Terrorist Required

July 2, 2012

By Howard McKew, P.E., C.P.E.

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Plenty of potential ventilation crises await many otherwise unassuming buildings, thanks to nothing more sinister than truck accidents, emissions from nearby buildings, or unavoidable natural disasters. However, by pairing a clear basis of design with HVAC response strategies, building owners can apply some forethought and preparation to avoid worst-case consequences. Start by asking the right questions about your facility.

HVLS Warehouse Fan: Safety Is A Hot Topic

July 2, 2012

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These fans (and their controls) take the NFPA exam for impact in a fire setting.

ASHRAE webcast highlights DOAS

April 30, 2012

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Registration for ASHRAE’s upcoming webcast, “Dedicated Outdoor Air Systems – A Path to Balancing Energy and IEQ,” opened March 19. The webcast focuses on the departure from conventional HVAC systems and takes place April 19, 2012, from 1 to 4 p.m. EDT.

Cleanroom Variable Airflow Design

April 27, 2012

By Vincent A. Sakraida, P.E.

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Appropriately enough, a good variable airflow design accommodates and refines a number of design variables. Particle monitoring strategies, minimum supply air calculation, HVAC sequencing, and space pressurization are just a few stops on the way to spotless performance.

Centrifugal Fans Installation Guide

March 23, 2012

By Khalil Kairouz and Dale Price

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Here’s a good reference for facilities, TAB pros, or even commissioning agents on what should be found on site (and how to achieve it in the first place). For install through setup, properly managing connections, bearings, controllers, and vibration risks will create an air of success.

Case In Point

Library earns LEED, foils complaints with UFAD

February 29, 2012

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Patrick Baldwin-McCurdy fields daily indoor air temperature requests from employees and students, but Seattle University’s (SU) lead buildings control technician rarely hears HVAC complaints from the college’s new library addition featuring under floor air distribution (UFAD).

Single-Zone AHU Trend Analysis – Cooling

February 27, 2012

By Rebecca Thatcher Ellis, P.E.

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How would you know if you were getting the right result via the wrong sequence of events?

Single-Zone AHU Trend Analysis

On to a new case after solving a museum mystery …

February 1, 2012

By Rebecca Thatcher Ellis, P.E.

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In this column, I will describe the “issue” disclosed through analysis of the trend graph included in my January 2012 column. I will also introduce a new system and show its trend graph, leaving it up to the reader to discover the operational “issue” illustrated in the graph. The answer will be given at the start of next month’s column.

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