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ARTICLES

Btu Buddy 133: Evaporator Coil Freezing, Low Ambient Problems

April 21, 2014

Bob and Tim were on their way to a no cooling call, their first of the season, when Tim asked, “Wonder why we would have a no cooling call this time of year? It is only 75°F during the day and 40° at night.”


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Avionics Mil-Spec Part Solves Commercial HVAC Temperature Stability Problem

Part Maintains Setting and Avoids Repeat Service Calls
April 21, 2014

Modifying an off-the-shelf control knob used in avionic systems stopped repeated service calls for a major maker of commercial rooftop units. Electronic Hardware Corp. (EHC) was able to change its standard PT70 control knob to fit on a small circuit board inside the different HVAC models.


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Balancing Legal Marijuana, Safe Workplaces, and Drug Testing Policies

What Employers Need to Know
April 21, 2014

More states are legalizing medical marijuana, and recreational use is legal in two others. A tangle of federal laws adds to the confusion. Being aware of the legal issues involved and the changing legal landscape is important for employers to ensure that their drug testing policies are legal and enforceable.


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Service & Maintenance

Online-only service and maintenance articles.

Technical

Online-only technical articles.

Business Management

Online-only business management articles.

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2014 MCAA Annual Convention

Scenes from the 2014 MCAA Annual Convention in Scottsdale, Ariz.

Podcasts

NEWSmakers: Julian Scadden

Training is an ongoing process. Julian will discuss how you can generate maximum return on time and energy invested training by following a three part process. Listen to this podcast to get expert tips on training, tracking and follow up. 

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2014 April 21

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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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