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Profiling an HVAC System

While profiling may be an unpopular word in airports these days, it remains the title of one of the best diagnostic procedures we've ever brought to you. You can profile an HVAC system by taking a series of temperature, pressure or airflow readings across it, and...

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Pocket Thermometer Diagnostics

Pocket thermometers can be very effective in demonstrating that an appliance is not venting properly, and spillage is occurring. When an appliance is operating correctly, the burner area of the heater should be drawing in room air or combustion air for proper burning....

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Outside Air Formula

Some field test conditions do not allow for accurate or convenient measurement of outside air CFM. But the percentage of outside air can be calculated using three simple temperature measurements. OAT - Outside air Temperature. This is the temperature of the air...

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Now That We’re Trained, What’s the Next Step?

After an air balancing seminar in Sacramento, California last month, a contractor asked "So now that we're trained, what do we do next?" I must admit, I thought that's what we'd been talking about for the previous three days, but the question was honest and required a...

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What Can Sir Isaac Newton Teach Us about Duct Renovation

What Can Sir Isaac Newton Teach Us about Duct Renovation by David Richardson When Sir Isaac Newton’s name is mentioned, many of us think of him getting hit in the head with an apple and discovering gravity. However, Newton can be credited with much more than this....

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It’s out! Manufacturers are building and selling super high efficiency heating and air conditioning equipment. How cool is that? Wait a tick – that’s old news right? That’s been happening in this industry since the first Oil Embargo back in 1973. So why is it after 42...

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Modern Service for Home & Business

Congratulation's to November's NCI Contractor of the Month: Jim Glennon, President of Modern Service for Home and Business in Fort Meyers, Florida. The company has been in business since 1965, and is home to more than 85 employees. They perform most of their work in...

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Mike Smith, Airsmiths Heating & Cooling, Sacramento, CA

Mike Smith, President of Airsmiths Heating and Cooling of Sacramento, California is this month's featured NCI Contractor. The young company focuses its energies on providing the best residential systems in California's Central Valley while sustaining profitable...

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Performance Instead of Promises: Aire Rite, Inc.

Contractor Spotlight: Performance Instead of Promises: Aire Rite, Inc. by Mike Weil, NCI VP Communications & Publications In the HVAC world, a performance-based contractor delivers a healthy, comfortable, safe, and energy efficient environments with proven...

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Mechanical Venting vs. Mechanical Combustion Air

Mechanical combustion air is the only proven way to provide adequate combustion air to appliances under most field conditions. There are, however, certain cases where because of the size of a mechanical room, the amount of internal forces in a building or mechanical...

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Airflow Testing & Diagnostics

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