THE TRADE IS BETTER WHEN WE HELP EACH OTHER
A place for HVACR and building performance people to talk shop, work through problems, and pass on what they’ve learned.
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FROM THE CONVERSATION
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Reading a schematic without panicking: the 3-pass method. Every new tech has the same moment: you open the panel, there's a wiring diagram that looks like a bowl of spaghetti, and your brain…
Just finished listening to the latest HVAC School podcast with Aprilaire. One thing I wish they’d gone into a little more detail on is filter media loft—not the overall filter depth (3”, 4”,…
New here — hello from Hawthorne Hey everyone, I'm Willson. I'm not a tech — I'm building ZOQENA, an AI automation company for small service businesses, and I'm here because the best way to u…
Hello, I am looking for a simple animation software to use in my classroom to draw out refrig cycle electrical diagrams etc. would be nice if it worked directly with a clever touch screen bo…
I’ve been building a few HVAC calculators, and I’d like some feedback from the No Bull crew. They’re free to use, with no login required. • Filter Pressure & Airflow — Check clean-filter pre…
For the Techs that service vented or ventless gas logs. What is the white powder that I’m seeing that collects on the logs and surrounding areas? Recently serviced a customers ventless propa…
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Everyday HVAC diagnosis, service, installation, and repair in homes.
Building performance, high-performance HVAC, and building science together: airflow, design, ducts, moisture, envelopes, and commissioning.
Rooftop units, split systems, ventilation, maintenance, and diagnosis in light commercial buildings.
Refrigeration for convenience stores, restaurants, and other food service: walk-ins, reach-ins, ice machines, and the work around them.
Supermarket cases, racks, refrigeration systems, and the conditions behind reliable operation.
Sequences, sensors, wiring, controls, and system integration across HVACR applications.
Variable refrigerant flow and variable refrigerant volume systems: installation, piping, controls, commissioning, service, and diagnosis.
Chillers, ammonia, large central plants, industrial refrigeration, and other large systems.
Leading crews, mentoring, hiring, customer communication, running a trade business, and building a team people want to stay on.
Share work you are proud of, surprising finds, and the lessons in your field photos. Albums also belong to your personal galleries.
Talk shop. Field photos, tools, lessons, symposium conversations, and questions that cross trades.
Technicians, contractors, consultants, specialists, and instructors. Residential HVAC, building performance and science, light commercial HVAC, food service and grocery refrigeration, and controls. You don’t need a perfect question to belong here.
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