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    Maintenance and repair of residential or commercial HVAC systems

    Highlights

    NCI/David Richardson
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    Create Air Upgrade™ Leads with Static Pressure Testing

    Sept. 17, 2024
    Unless you measure static pressure, Air Upgrade™ opportunities remain hidden.
    NCI/David Richardson/Fieldpiece

    The Best HVAC Service Columns by David Richardson

    Aug. 6, 2024
    David's columns for Contracting Business have been audience pleasers. Here are a few of his recent best.

    How to Perform ACCA-Approved Manuals J and S Correctly

    July 11, 2024
    Why are contractors not taking Manual J seriously? Unfortunately, many think 'nobody is going to notice.'
    JJM Alkaline Technologies

    How HVAC Contractors Can Protect Structures from Acidic Condensate

    July 1, 2024
    Condensate neutralizers will stop acidic concentrate from condensing furnaces from corroding plumbing and polluting groundwater.

    Solving Fan Failure Errors

    June 18, 2024
    Fan failure and blower errors are a continuing problem in an otherwise great HVAC industry advancement.

    Recommended

    Yellow Jacket
    66cf24183a5de14c4c96b9adrefrigerant_recovery_gauge

    Quiz: Refrigerant Recovery & Evacuation (Part 2)

    Nov. 19, 2024
    How much do you know about proper recovery and evacuation procedures?
    Hero

    Skilled Trades Need Skilled Support

    Sept. 14, 2023
    The skilled trades represent a long tradition, but little about the profession feels traditional today. Contractor work is facing rapid change due to advances in technology and...
    David Richardson/NCI
    Interior Hvac Diagram

    Limitations of Dry Bulb Temperature Measurements

    April 17, 2023
    During cooling season, dry bulb temperature is s a popular and fast measurement, but let's look at the proper application and what to include to increase value for customers.
    David Richardson/NCI
    If you know what to look for, a visual inspection provides clues to unsafe operation. It's never good for one package unit to exhaust into the economizer of an adjacent unit.

    Four Signs of Package Unit CO Safety Issues

    April 4, 2023
    What to look for during your spring maintenance calls that may reveal hidden CO (carbon monoxide) safety issues in package units and split systems.
    National Comfort Institute
    Before you jump on the heat pump bashing bandwagon, look at your duct installation practices first.

    One Reason Heat Pumps Have a Bad Reputation

    March 21, 2023
    You can quickly discover why a properly sized and charged heat pump system struggles to condition a home by measuring duct system temperatures.