User posts

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 pressure drop and face velocity at your airflow. Search for a specific filter or compare filters, cabinets, and return-filter setups. https://filters.kalosflorida.com/ • […]

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 propane gas logs and notice a lot of this powder like debris. Any one know what’s going on here?

My personal opinion, for what it’s worth. Our trade needs new blood, and so does just about every other trade. No fake news there. The good news is that trade schools keep getting more popular. The problem is the schools are in the same spot we are. Public or private, they’re desperate for instructors, and […]

My real world experience has been in HVAC, but I’ve read “Refrigeration for HVAC techs” a couple of times and watched an abundance of Nor-Cal Dave and Chris from HVACR Videos 🙂 I got lucky and had an acquaintance with a small business working on beer draft lines, and I’m now (past month) running anything […]

I have a Trane heat pump, model number XP14-024-230, and the homeowner heard the unit make a crazy noise when it came on that sounded like fireworks. The contactor was being pulled in and then released and repeated very rapidly. The contacts were very toasty so I replaced the contactor with an exact replacement according […]

As a general rule, we have always used 15% silver solder for rack installations and all associated piping. Because of the significant increase in price of silver solder, I’m considering using Harris Dynaflow 6% silver. My thought is to use 15% for all connections onto the rack (closer to vibration source), and 6% for all […]

Having issues with refrigerant readings… Installed a Guardian RC318 (1.5 ton condenser, R454B) with a new Guardian 40,000BTU furnace and new evaporator coil. Evap came with factory installed TXV (made sure TXV was positioned like the manual says). Also new lineset about 30’ long with new filter drier. Brazed all joints while flowing nitrogen. Vacuumed […]

I’ve got a question for the commercial refrigeration experts about a walk in freezer. I primarily work on HVAC but now I’m in a job that requires HVAC and some refrigeration. I thought I could dust off that knowledge and figure this issue out, but apparently not. Anyway I’m working on a TEHA015L6-HT3D-F, with a […]

This is a new T-shirt idea that I have for the HVAC school store. What do you think?