NCI Article Library

High-Performance HVAC Resources

Current Article Library Category: Air Conditioning

Humidity Testing Tips

The primary challenge in effectively measuring humidity is accuracy. The two major elements affecting accuracy are the reliability of your test instrument and the measurement technique that you use. Choose a good quality instrument. Many low cost instruments are...

How to Use Fan Performance Data in Your Diagnostics

Almost every day we receive requests for additional generic fan performance tables other than .50" table we published previously. Well, you asked for it, you got it. We've just introduced two new generic tables, one for constant speed blowers with up to .80" ESP and...

How to Select Your First Water Balancing Gauge

When it's time to take your first try at measuring the performance of a hydronic system, you might want to begin with some starter instruments. A hydro- manometer like the big boys use normally costs over $3000.00 each. Although well worth it, you may not want to part...

How Airflow Affects Heating Efficiency

Airflow is critical to proper heat transfer in heating and air conditioning systems. Most of us know the rule that temperature drop over a cooling coil should be 18 to 22 degrees. If the temperature drop increases, it is evidence that airflow is low. If the...

Homer Nine and Sons of Beaver, Pennsylvania

May, 2010 NCI Member of the Month

Holiday Marketing Idea

One of the hottest gift ideas this Christmas is a simple gift card or gift certificate. It presents a way to give, and is often one of the most well received items under the tree. Friends and family are giving gift certificates or cards for meals, travel, services and...

Henry Sterling of Sterling’s Heating and Air Avon, OH

July 2003 Contractor of the Month

Heat Strip BTU and Performance

Since the cold has set in we have received many calls and e-mails on PerformanceTalk from contractors and technicians wresting with electric heat systems. The two main topics discussed are: How to determine and rate electric heater performance and how to figure the...