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Progressive Water Heater Troubleshooting

Most of us wrestle with frustration when it comes to solving problems related to water heater pilot outages. Some of us admit we often give it a half-hearted effort because we think the problem should be fixed by the utility company or someone else. When in many cases...

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NOX – How Does It Affect Us?

NOX - How Does It Affect Us? by Jim Davis NOX is defined as oxides of nitrogen and is the combination of NO + NO2. It starts to form in the combustion process in the hot flame zone of combustion between 2500º to 2800º, combining nitrogen in the air with oxygen. Some...

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New CO and Combustion Seminar Unveiled

NCI's Carbon Monoxide and Combustion seminars have undergone a major renovation this summer. The great mind of Jim Davis has been at it again. New forms, updated procedures, improved teaching tools and reinvented learning exercises have been flowing out like CO from...

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Never Downplay the Value of a Visual Inspection

While performing complete combustion diagnostics is critical, visual inspection is often what solves problems before start-up and allows us to fix them. Because environmental conditions constantly change, even the most experienced technician can be fooled using...

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Never Downplay the Importance of a Visual Inspection

While performing complete combustion diagnostics is critical, visual inspection is often what solves problems before a start-up, and allows us to fix them. Because environmental conditions constantly change, even the most experienced technician can be fooled using...

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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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Mechanical Miracles (and Mistakes)

When working in the field, there are an infinite number of variables to deal with. When listing the operating ranges of equipment on all the different NCI Diagnostic Forms, 98% of equipment is covered. However, there is that last 2% that are called mechanical...

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Make-Up Air Equals IAQ, Safety, Comfort & Efficiency

Most homes are already leaky and drafty so why would you want to bring in more outside air into the duct system? Because that's the best place to bring it in! Normally the air that comes into buildings, leaks through the walls, windows, doors, electrical outlets,...

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Low-Level Carbon Monoxide Poisoning: Know the Symptoms

The most talked about symptoms of CO poisoning are those that mimic the flu, such as nausea, headache, and dizziness. Fever is another symptom we rarely hear about. These symptoms may be reactions to a short term CO exposure, but what symptoms are common in exposures...

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Induced Draft & Atmospheric Common Venting Interference

When an Induced Draft Appliance (Furnace, Boiler, Water Heater) is "Common Vented" with an Atmospheric Appliance, venting interference can occur. This procedure is the proper method to evaluate this situation and take all precautions to verify safety. Necessary tools...

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Jim Davis

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