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Put your HVAC design knowledge to the test and see how well you understand ACCA Manual S and proper equipment selection.
National Comfort Institute
Biological growth in the crawlspace.
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Learning Resources

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Discover how mechanical contractors can confidently lead client conversations around decarbonization and electrified heating solutions for new and existing buildings. Gain practical...
Oct. 13, 2026
Sponsored
Air-to-water heat pumps are reshaping high-efficiency building design. Learn how hydronic systems can improve comfort, efficiency, and IAQ while creating new opportunities. Register...
Aug. 18, 2026
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Sponsored
From refrigerant regulations and supply shortages to rising labor costs, today’s HVAC/R contractors and facility managers are navigating a business environment that&rsquo...
Oct. 1, 2025
Sponsored
Symbio® 700 equipment controllers feature cutting-edge performance programming designed to adapt and excel. Download the brochure to explore the benefits and learn how this controller...
Sept. 11, 2025

Podcast

Residential HVAC

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Honeywell Home ElitePRO™ smart thermostats combine a streamlined install and setup experience with the advanced capabilities of Resideo Pro-IQ™ services to deliver...
Sept. 1, 2026
Igor Kudinov
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Commissioning should be a documented, multi-point process rather than a final, rushed step to ensure long-term system performance.
Aug. 24, 2026
Hydronic heat pumps are emerging as a versatile, efficient solution for electrifying homes, leveraging existing water-based infrastructure to provide heating, cooling, and hot...
Aug. 19, 2026
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How simple membership programs can protect your clients, stabilize your revenue, and keep your competitors out of your lane.
Aug. 18, 2026

Commercial HVAC

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Data center cooling and building decarbonization are emerging as major demand drivers as commercial HVAC investment expands.
Aug. 21, 2026
Caleffi Hydronic Solutions
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Pressure independent control valves aren't just for skyscrapers—they can simplify balancing, improve comfort and reduce commissioning time in commercial hydronic systems of nearly...
Aug. 10, 2026
The San Diego facility demonstrates how facility, rack, and chip-level cooling systems work together in an operating data center. Along with live demonstrations, DDC Solutions...
Aug. 5, 2026
Gradian Thermal Solutions launches as the parent company for MAS HVAC, Daedex, DeepCoolAI, and Ecochillers, expanding integrated cooling solutions for data centers and mission...
July 29, 2026

IAQ & Ventilation

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HVAC Chats
Derek Aarstad explains how diagnostics, building science, testing, and customer education can help HVAC contractors deliver better results and differentiate their businesses.
Aug. 26, 2026
From pioneering combustion testing to mentoring generations of technicians, learn why Jim Davis' impact on HVAC safety will be felt for decades to come.
Aug. 4, 2026
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A new bipartisan bill would require a nationwide assessment of indoor air quality, ventilation, and HVAC system performance across federal facilities following dangerous wildfire...
July 30, 2026
More than an instructor, Jim Davis mentored generations of technicians and left behind a legacy that will continue shaping combustion training for decades.
July 7, 2026

Refrigeration

From AI-assisted diagnostics to workforce shortages, Lori Schiavo shares the trends reshaping refrigeration and what contractors should do now.
Aug. 13, 2026
Modern refrigeration systems think for themselves. Technicians who ignore the control side are working harder than they need to be.
Aug. 12, 2026
The re-awarded contract carries an initial term through August 4, 2031, with a potential extension through July 2036.
Aug. 7, 2026
Chemours
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Chemours' second-quarter results suggest the refrigerant aftermarket is settling after last year's American Innovation and Manufacturing Act transition-driven inventory build....
Aug. 5, 2026

Product News

Explore the newest HVACR products introduced this month, showcasing cutting-edge technology and innovative solutions from leading manufacturers in the industry.
Aug. 7, 2026
NAVAC announced the launch of its SK4TPHM1 Smart Refrigerant & Air Side Diagnostics Pro Kit, a complete wireless diagnostic solution designed to help HVAC professionals improve...
July 24, 2026
With features like quick installation, high load ratings, and weatherproof construction, Big Foot Systems supports a wide array of rooftop equipment, backed by a 10-year warranty...
July 21, 2026
Refrigeration Technologies
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Refrigeration Technologies, the Southern California-based manufacturer behind the Viper line of non-toxic HVACR chemical solutions, announced the launch of Viper EZDose, a gravity...
July 20, 2026