Ventilation

Duct Dynasty: Duct Sealing Side Effects You Need to Know

Take Caution When Sealing Up Undersized or Oversized Equipment
By David Richardson
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Is there a possibility that duct sealing could negatively affect an HVAC system? 


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MacroAir Technologies Inc.: High-velocity, Low-speed Fans

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The AirVolution-D 370 offers blades from 6-12 feet and is ideal for ceiling heights as low as 12 feet.


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June 30, 2014: Greenheck to Build Innovation Center and Education Center

Centers Will Provide New R&D Facility and New Educational Training Site
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Greenheck has announced that it will be building two new facilities on its Schofield, Wisconsin, campus, the Robert C. Greenheck Innovation Center and the Bernard A. Greenheck Education Center, to honor its founders.


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Rinnai Corp.: Vent-Free Fan Convectors

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The Vent-Free Fan Convectors are available in 10,000- and 24,000-Btu models and operate without vents or ductwork, making them suitable for room additions, basements, or sunrooms. 


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Berner Intl. Corp.: Single-Length Air Curtains

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Single-length 7-, 8-, 9-, and 10-foot-long models have been added to the ANSI/NSF 37-certified E-Zone and K-Zone (EZN and KZN Series) air curtains. 


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Tjernlund Products Inc.: Rooftop Chimney Fan

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RT-Series Inducers are designed to solve draft problems and are available with an optional Constant Operating Pressure Control (COP). 


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Dynalloy Inc.: Automated HVAC Vents

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The Cue Vent™ automates retrofitted standard HVAC registers by automatically changing the direction of the airflow with no motors, batteries, or electricity, using only a dynamic alloy wire that is temperature activated by the heater or air conditioner. 


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Armacell LLC: Fiber-Free Elastomeric Duct Liner

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Created specifically for spiral ducts, AP Spiralflex™ is a 100 percent fiber-free, elastomeric duct liner. 


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Duct Dynasty: The Building Side of the Duct System

Considering Airflow Outside of Sheet Metal
By David Richardson
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If you’re reading this article in a building that has a forced-air HVAC system in it, you’re sitting inside the duct system right now.


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Air Curtains Keep Milk Cold — Not Frosty

Air Curtains Help Neutralize Subfreezing Wisconsin Winters
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Dairy farmer Hans Griesen was losing product and productivity due to freezing wintertime temperatures at his Madison, Wisconsin, milking parlor until he installed two air curtains.


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2014 Energy Efficiency Forum

Highlights from the 25th annual Energy Efficiency Forum in Washington, D.C.

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NEWSMakers: Rajan Rajendran

Rajan Rajendran, newly appointed director of the Emerson Innovation Center, talks about the new $35 million facility and how it will function on the University of Dayton campus. Posted on Aug. 29.

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2014 August 25

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Prohibiting HFCs

EPA is proposing a rule that would prohibit some HFCs in select refrigeration applications. Do you agree with this move?
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2014 National Plumbing & HVAC Estimator

Every plumbing and HVAC estimator can use the cost estimates in this practical manual!

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