NCI Article Library

High-Performance HVAC Resources

Current Article Library Category: Air Conditioning

Bradley Mechanical, Chesterfield VA

Brad Bradley, owner of Bradley Mechanical in Chesterfield, Virginia is this month's NCI contractor of the month. We salute Brad for his accomplishments in the industry and congratulate him and his crew for ending the year with a 19% net profit. Brad exercised wisdom...

Both Sides of the Fan are Equal

One phrase we hear at nearly every seminar is something like "Airflow is low on the return side because of high suction pressure at the fan." Although it sounds good, and most of us may have believed it at one time, it's not accurate. In truth, airflow at the inlet of...

Boost Marketing Efforts with “Leave Behinds”

Probably the lowest cost and most direct marketing we can do is to leave behind marketing materials with our customers after a service call. This is on the spot marketing placed at the exact moment your customer is most aware of the value that you bring them and is...

Bill Campbell of Campbell Comfort Systems Thorofare, NJ

Bill Campbell of Campbell Comfort Systems, Thorofare, New Jersey has been selected as June's NCI Member of the month. The Cooling Report Card featured in the May issue of NCI NetSource" was Bill's brainchild at our April Boot Camp. Bill has since fully implemented...

Beyond the Venting Tables

There seems to be a lot of confusion about how to size a flue or chimney when multiple appliances are vented together in the field. Let's take a look at two flue sizing methods that you can choose to apply. The first utilizes the published industry venting tables. The...

Bay Area Air Conditioning, Crystal River, Florida

Dave Hutchins, Owner of Bay Area Air Conditioning located in Crystal River, Florida is October's NCT contractor of the month. Dave and his crew of 88 employees operate a $9 million per year contracting company. Bay Area Air Conditioning has offered a Guaranteed Energy...

Barometric Damper Test and Installation

We've just released a new Barometric Damper Installation Procedure that will enable you to easily determine how to diagnose the need for, and install, barometric dampers under a variety of field conditions. Let's walk through a typical multiple vent scenario...

Barometric Damper Adjustments – Gas vs. Oil

Traditionally, our industry is familiar with setting up barometric dampers on oil equipment, but not gas. This might be because the set up for each is very different. Oil Set Up When setting a barometric damper on oil equipment, a draft gauge is used and a draft...

Balancing a Zoned System

Balancing a zoned system requires a few more steps than balancing a typical constant volume system. Let's take a look at the zoned system balancing procedure and investigate the differences. The added work increases the labor about 25% on a project. The first step is...

Balancing a System with Zoning

Balancing a zoned system requires a few more steps than balancing a typical constant volume system. Let's take a look at a zoned system balancing procedure and investigate the differences. The first step is to inspect the system and compare the plan to what actually...