Tech Tips

This is a quick tech tip derived from a short podcast episode in response to a question by one of our viewers, Gunther. You can listen to that episode HERE. If you would like to submit a question for the podcast, you can submit a voice recording on Speakpipe at https://www.speakpipe.com/hvacschool.   Restaurants are commercial facilities […]

I’m installing the HVAC system for a house that is being completely gutted. It has vaulted ceilings throughout, and a small attic area was designated for mechanicals. The duct system can’t go in the attic because there basically isn’t one. The engineer intended the equipment to go in the attic mechanical space, and then the […]

This is a quick tip from the “Expansion Valves – What Does and Doesn't Matter?” livestream on our YouTube channel featuring Joe Shearer, Matthew Taylor, and Corey Cruz. It’s time to talk about brazing again! Even though rehashing “flow nitrogen” and “use a wet rag” gets a little old, bad TXVs and callbacks also get […]

There are several neighborhoods in my area with two—and three-story townhomes with zoning, and I always wonder how long those systems will survive. Zoning can be notoriously hard on HVAC equipment if not set up properly. A single-stage system running full tilt with half the airflow it was designed for because a zone is closed […]

As many of you may know, Kalos does most of its training in-house. We’re lucky to have people like Bert on our team; he can give classes to several people at a time and is also great at one-on-one mentorship. Many of our managers and directors are also top-notch educators. Unfortunately, these people are still […]

“Did you do a Manual J?” “Did you run a Manual S on that?” “What does Manual D say?” If you’ve asked any design-related questions on the internet in the last several years, you’re probably familiar with these questions. But how does one “do” a Manual T? I bought Manual T last year and gave […]

This tech tip features a diagnostic flowchart by Genry Garcia. Thanks, Genry! The name of this document, “The MAD Room,” was chosen as a nod to the MAD-AIR study completed by John Tooley and Neil Moyer, presented in 1989. The teachings from that document played an instrumental role in creating the following diagnostic workflow. Disclaimer […]

This is a quick tip from the “Expansion Valves – What Does and Doesn't Matter?” livestream on our YouTube channel featuring Joe Shearer, Matthew Taylor, and Corey Cruz. You can watch it on our website HERE. Equalizers get their name because they provide a closing force to equalize against the bulb pressure (an opening force). […]

There is not much worse than having a service call where you can’t figure out where the water is coming from or where it came from before you got there. I have spent many hours scratching my sweaty head in attics while I stared into the riser of a drain line, waiting for water to […]