Series
The A2L Job
What the A2L class means, how codes adopt it, and what changes on the job for technicians, contractors and design engineers.
Technical"Mildly Flammable" Describes How an A2L Burns and Does Not Measure Ignition OddsRich Chaffin | November 4, 2026
TechnicalA2L Rules Vary City to City Because Codes Adopt Safety Standards Edition by EditionRich Chaffin | November 4, 2026
TechnicalR-454B and R-32 Change Cylinders, Leak Detectors and Ignition Checks on the JobRich Chaffin | November 4, 2026
TechnicalSwapping the Other Half of an R-410A Split Can Create a Prohibited New SystemRich Chaffin | November 4, 2026
TechnicalR-32's Record Abroad Rests on Small Splits and Thin Incident DataRich Chaffin | November 4, 2026
Cooling the AI Build-Out
How data center demand is changing commercial HVAC order books, who is buying into liquid cooling, and how the systems work.
Data CentersCarrier Data Center Orders Rise 300 Percent, Lifting Backlog Past $8.5 BillionStaff Reporter | November 4, 2026
CommercialTrane Backlog Reaches $12.5 Billion as Bookings Climb 21 PercentRich Chaffin | November 4, 2026
Data CentersData Center Liquid Cooling Buyers Now Pay for Coolant Service, Led by VertivStaff Reporter | November 4, 2026
TechnicalDirect-to-Chip Cooling Sends Data Center Heat Through a CDU and Two Separate LoopsDrew Thornley | November 4, 2026