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2020 NEC, Section 712.2 DC | Microgrids and System Directories

Here’s how the 2020 NEC Article 712 has changed and expanded the identification requirements for microgrids and system directories.

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Electricians: Six Reasons Your Job Just Became More Secure

Let’s take a look at what has occurred recently in government green energy policy and why your job is secure as an electrician.

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Attention Veterans: You Are Needed in the Water Industry Now!

Veterans are an untapped resource primed to take on the water industry’s need for skilled workers. In this article we’ll discuss why veterans are a good choice for the field, why they would benefit from jobs in the water sector, and how employers can actively seek and recruit veterans.

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Air Conditioning and Refrigeration Systems – Routine Summer Maintenance

To transfer heat efficiently, air conditioning coil surfaces need to be kept clean, as dirt and debris not only inhibit air flow across the coil, but they also decrease the thermal conductivity of the surface area. Here are some important things to remember when performing summer air conditioning maintenance programs.

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The Retail Market’s Biggest Threat

One of the biggest threats facing retailers are cyber security attacks. While not completely avoidable, security solutions are available to help limit the damage.

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Dehumidifying Sealed Crawlspaces

Its 95 degrees on a hot, humid day. A service repairman, working on your HVAC, opens the door to your vented crawlspace. He observes ductwork dripping with water, mold on floor joist, and termite tunnels on the crawlspace walls. He services your air conditioner and recommends you call an exterminator. Why are you having all these issues in your crawlspace? Could it be that the naturally vented crawlspace doesn’t work anymore? Some people would say, it never worked. Why is this?

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Emphasizing the V in HVAC – Ventilation Trends

When we see the acronym HVAC, most only think of heating and air conditioning. But the V is for ventilation, an important role when considering the air quality in buildings. Indoor air quality is achieved through ventilating and filtering air in a space. The International Mechanical Code’s definition of ventilation is “The natural or mechanical process of supplying conditioned or unconditioned air to, or removing such air from, a space.” When we supply fresh air to spaces and remove stale air, we improve the breathing air quality for the occupants. When air is “conditioned”, it means several things that include removing or adding heat, cleaning the air, removing moisture, and replacing air.

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How Today’s Energy Code Affects Mechanical System Installations

In the recent past, a mechanical contractor could install very inefficient appliances and equipment with no thought to energy costs. Energy rates were cheap; therefore, mechanical codes did not address energy usage. Mechanical code emphasis was on installation integrity, clearance to combustibles, and service space requirements. The installed equipment was very heavy and overbuilt. That all changed in the late 20th century due to several economic and environmental factors. These factors created a new buzzword: energy conservation.

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Sound Powered Air Conditioning

What if a refrigeration system could exist without a mechanical compressor, oil, or the typical blended refrigerant? A totally new design that required much less electricity to operate? Components of the system consist of an inert gas and large pressure vessels connected by pipes. This mechanism would be based on thermoacoustic principles that had very few moving parts. Considering the environmental issues faced today, wouldn’t it be an amazing achievement?

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Venting Gas Furnaces into Masonry Chimneys

The combining of fuel, air and an ignition source creates combustion. This combustion process is utilized in furnaces and water heaters to heat air or water. Byproducts of combustion are carbon dioxide, water, occasionally carbon monoxide and other gases.

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The Successful HVAC Company

According to industry experts there are over 100,000 HVAC contractors currently doing business in the U.S. However, statistics show that 50% of small business startups fail within the first year and 95% fail within five years. Therefore, the 100,000 plus contractors successfully doing business have figured a thing or two out. Let’s look at some standard business practices of these HVAC companies that keep them profitable and out of the failure statistics.

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Top Advantages of Mini-Split Systems

The mini-split heating and cooling system was an idea that evolved from the basic window air conditioner. Window units are simple installations that offer room by room temperature control if enough are installed. However, window units are noisy. To minimize noise, the window unit compressor was moved to a remote location using refrigerant lines to connect to the inside fan-coil. As a result, the mini-split system was born. This product first saw mass appeal in Asian markets. Today these systems are found throughout the world and has become a big player in the domestic HVAC market.

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Who Needs A Load Calculation?

There is an old joke among HVAC contractors. When bidding on a replacement system for a customer, step back 100 feet from the house and hold up your hand. If three fingers will block the view of the house, install a three-ton unit. If it takes four fingers to block the view, then install a four-ton unit. That meager attempt at humor does highlight an issue that has been kicked around since the beginning of the industry. Are load calculations necessary? If so, how do you properly size a heating and air conditioning system for a house or commercial building?

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Online Continuing Education Classes Now Offered for HVACR License Renewal

JADE Learning, a nationally trusted electrical continuing education provider, now offers online CE courses for HVACR technicians in 12 new states across the U.S. with courses approved for New Jersey coming in the Fall of 2019. JADE works with each state’s board of contractors to design approved courses helping heating, ventilation, air conditioning, and refrigeration technicians meet continuing education requirements for license renewal.

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The Air Conditioning System of the Future

Back in the rural south, around 1940, power companies would mail flyers to their customers at the beginning of summer. These flyers would give tips on how to stay cool during the hottest days ahead. Some of the tips were; grow ample shade around your residence, stay inside during the hottest part of the day, use open windows for increased air circulation, and keep wet towels available to cool your forehead and neck. Homes, in those days, were designed to facilitate air movement. Large porches and arched ceilings in hallways enhanced air currents that moved freely through the structure. These conditions were the norm for homeowners before the availability of affordable air conditioning.

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2020 NEC, Section 712.2 DC | Microgrids and System Directories

Most Recent

Electricians: Six Reasons Your Job Just Became More Secure

Attention Veterans: You Are Needed in the Water Industry Now!

Air Conditioning and Refrigeration Systems – Routine Summer Maintenance

The Retail Market’s Biggest Threat

Recently in

Dehumidifying Sealed Crawlspaces

Emphasizing the V in HVAC – Ventilation Trends

How Today’s Energy Code Affects Mechanical System Installations

Sound Powered Air Conditioning

Venting Gas Furnaces into Masonry Chimneys

The Successful HVAC Company

Top Advantages of Mini-Split Systems

Who Needs A Load Calculation?

Online Continuing Education Classes Now Offered for HVACR License Renewal

The Air Conditioning System of the Future

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2020 NEC, Section 712.2 DC | Microgrids and System Directories