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Welcome to Tri-Dim® Filter Corporation's website. Tri-Dim is a leading manufacturer of HVAC filtration products, offering a full range of HVAC products and services – our products and services include:
In addition to reviewing our products and services you may also place an order through our E-order system or check the status of your order. You can also learn more about Tri-Dim and check for current job offerings.
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TRI-NEWS - Winter Edition
The Winter Edition of the Tri-News is now available - articles in this issue include TRI-CUBE MERV 11, ASHRAE Position Paper, IAQ TIP - Common Problems and more.
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Report Says Hospitals Should Increase Infection Control
A single patient infected with the increasingly common "superbug" known as MRSA can cost a hospital more than $60,000, researchers at Duke University reported Tuesday. A study of seven hospitals and health facilities shows that taking action to fight infections can save money. The study suggests it is worthwhile for hospitals to increase infection control measures—even if they seem expensive—and even hire a staffer to handle the issue. The study is published in PLoS ONE, the journal of the Public Library of Science.
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IAQ TIP - Common Problems
Five common problems in HVAC filtrations systems are
1. Air Bypass
2. Damaged Filters
3. Plenum Doors
4. System Hygiene
5. Monitoring Resistance
We are not inferring these are the only problems but these are certainly among the most common. In this article we will deal with item number one on the list - air bypass. Air Bypass simply stated is the air that passes around a filter allowing contaminated air downstream of the filter bank. The results of allowing air bypass include coil fouling, contamination of the air conveyance system, microbial growth, decrease in filter efficiency and none of these include the effects on the filtered space. These could include increased product rejection, increased worker absenteeism, increased nosocomial infections, etc.
Bypass typically occurs between filters (see photo), between the filter and frame, between frame components, plenum door gasketing missing or damaged, missing spacers, damaged filters, etc.
Bypass can be easily eliminated by removing all gaps and spaces where air can bypass around the filter bank. These steps include gasketing filters, fixing all leaks in the housing/framing system, making sure all spacers are properly installed, check gasketing on plenum doors, replace any damaged filters, etc.
The bypass of unfiltered air can effectively reduce the efficiency of a filter by several MERV values - resulting in the wasting of money spent on the performance/protection provided by the filter.
Next issue we will examine ‘Damaged Filters’
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