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Home » Topics » HVAC Contracting » Technical

Technical
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Five compressor parallel compressor rack.

Refrigerated Food for Thought: Parallel Compressor Racks in Commercial/Industrial Applications

Parallel racks offer energy efficiency and installation advantages
Jim Coats
Jim Coats
April 18, 2016

Parallel compressor refrigeration racks have been the primary source of refrigeration for the grocery store industry over the years. In this article I am going to go over the benefits a parallel rack system can offer the commercial and industrial refrigeration markets.


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Observing MRSA

MRSA: The Superbug That Could Cost Hospitals Super Sums

The solution to reigning in MRSA infection rates lies in air-cleaning technology
Anthony Sannazzaro
Anthony Sannazzaro
April 4, 2016

Hospitals today are increasingly being challenged by rising patient infection rates, especially from superbugs such as Methicillin-resistant Staphylococcus aureus (MRSA). And the challenges are only going to increase as new Medicare rules go into effect in 2017 that will include MRSA in all reimbursement calculations.


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Jim Coats

Refrigerated Food for Thought: Airflow and Air Distribution in Refrigeration

Selection and placement of the correct equipment is critical
Jim Coats
Jim Coats
March 21, 2016

It is my firm belief that airflow and air distribution is every bit as important in refrigeration design as load calculations. What good is a properly sized system that can’t deliver the air to areas that need it? Poor air distribution and airflow lead to stratification in temperature and humidity as well as poor heat transfer.


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ORNL test results for the R-22 unit at AHRI Standard 210/240 A, B

Alternative Refrigerant Evaluation for Mini-Split Air Conditioners

Finding R-22 and R-410A alternatives for high-ambient-temperature environments
March 7, 2016

The Oak Ridge National Laboratory (ORNL) High-Ambient-Temperature Evaluation Program for low-global warming potential (GWP) refrigerants aims to develop an understanding of the performance of low-GWP alternative refrigerants to HCFC and HFC refrigerants in mini-split air conditioners under high-ambient-temperature conditions.


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U.S. HFC phasedown proposal

DOE and Stakeholders Consider Best Approach to Major HVACR Research Effort

Workshops solicit input regarding the needed technical focus
February 22, 2016

The U.S. Department of Energy’s (DOE’s) Building Technologies Office (BTO) recently convened two workshops to discuss the potential launch of a major research effort for advanced HVACR technologies.


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Richard Gerbe and Anthony Sannazzaro

2016 AHR Expo Takeaway: Four Areas Ripe for Innovation

As the HVAC industry gradually innovates, four areas have the most potential for boosting building efficiency
Richard Gerbe and Anthony Sannazzaro
February 8, 2016

With another AHR Expo in the books, it’s clear that even though the industry is gradually progressing, overall it’s ripe for innovation. Four areas in particular stand out where forward-thinking manufacturers can have a powerful impact.


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energy recovery ventilator

Don’t Breathe Easy: The Adverse Effects of Poor IAQ

How contaminated indoor air is harming our health, businesses, schools and homes — and what can be done
Nick-Agopian
Nick Agopian
January 18, 2016

What causes poor IAQ? What are the negative effects? And most importantly, what can be done to achieve cleaner indoor air? This article will attempt to shed light on these questions so we can all breathe a little easier.


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Weil-McLain SlimFit 1500 condensing boilers

Advances in Boiler Construction and Design

The boiler market has been slowly shifting to more efficient condensing units
John Kopf
January 4, 2016

Contractors, architects, engineers, and others who specify commercial and industrial boilers continually seek systems that are more cost effective, energy efficient, and environmentally friendly. The boiler industry has responded by making significant advances in both construction and design.


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Making Energy Storage Simpler and Easier to Implement

Pre-engineered solution maximizes operational savings
Greg Mazurkiewicz
December 21, 2015

The new Building Load Deferment (BLD) system, from HIGHMARK, New York City, is a pre-engineered thermal energy storage system, enabling energy usage to be deferred to off-peak hours via ice storage and then utilizing that ice for the building’s chilled water system during peak hours, for energy savings of up to 50 percent.


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NREL Seeks to Optimize Individual Comfort in Buildings

Localized comfort could bring big HVAC energy savings
December 7, 2015

Tucked inside a unique structure at the U.S. Department of Energy’s (DOE’s) National Renewable Energy Laboratory (NREL), two volunteers were participating in an experiment inside NREL’s newly constructed Comfort Suite (C-Suite) designed to reveal the connection between human comfort and energy systems.


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