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  So what does the Testo 550 do better? Higher accuracy, the Testo 550 has 2-3 time the accuracy of analog gauges and does not easily go out of calibration No need for a temperature pressure chart, the Testo 550 calculates saturation temperatures for every common refrigerant Real-time superheat and sub-cooling. The 550 will calculate superheat and sub-cooling on systems when they are unstable like periods of low load. Because it tracks changes in real time it is easy to see m …

Combustion efficiency is a measurement of how well the fuel being burned is being utilized in the combustion process. This is different from the efficiency number produced on the analyzer, which is reflective of the total amount of heat available from the fuel minus the losses from the gasses going up the stack.   Stack loss is a measure of the heat carried away by dry flue gases and the moisture loss. It is a good indicator of thermal efficiency. The stack temperature is the temperatur …

FREE Combustion safety Webinar. Details are hereRESNET or BPI CEUs for a small fee after test.

In my twenties, I spent a lot of time doing service calls in some of the tallest buildings in downtown Baton Rouge.  Some of the mechanical rooms inside these buildings are a sight to see.  They are full of heavy industrial equipment from pumps to chillers and steel piping everywhere!  Have you ever been in a large commerce building that is vacant?  It can be a bit eerie and creepy quiet.  This is the same feeling I would get when walking into a basement floor mechanica …

Yes, that’s right, TruTech turned 13 years old on April 23, 2020! And like many 13 year olds, we are being introspective about who we are, where we came from and where we are headed.As the title hints; we try to have fun with the work we do and not get too, too serious about ourselves.Just like a child grows so much over an 8 year time span, a lot has happened since 2012 when we made our last birthday update blog post (on our fifth anniversary).James C. BergmannLet’s start by remembering one of …

The Testo 557 Evaluation   Altitude/Barometric Pressure Compensated SensorsOne of the little touted features of the very first generation 523 was absolute pressure sensors which offered extremely high accuracy at all elevations compared to the relative pressure sensors used by the rest of the industry. (Again, Testo was simply ahead of their time.) The downfall of this, aside from the higher cost, was the fact that the instrument required a dead-band of about +/- 3 psi to hide chang …

Did you know that there were 367,900 HVAC technicians in the United States in 2018? The expected growth in our industry is 13% from 2018 to 2028. And it's no wonder why because residential and commercial buildings both need to be properly heated and cooled throughout the year. If you're a HVAC technician or planning to become one then you need to know about manometers. Keep reading to learn more about manometers, including the different types of manometers and which are the best digital manom …

Last summer I went to the home of a new customer on a sales call.  A previous company had come out and told her that the system had a bad compressor and that the air conditioning system needed to be replaced. I went into the home, and I came to the same conclusion.  However, upon my inspection, I pointed out to her that the fresh air intakes for both air conditioning units were disconnected and capped off.  She went into an explanation that the previous company who capped off the …

Any HVACR technician can attest to the fact that having the right tools for the job makes a huge difference. Regardless of where you live or work, in the U.S. or Canada, people need HVACR services to feel comfortable in their homes and workplaces throughout the changing seasons. Additionally, refrigeration services are critical when it comes to food preservation and storage. There is a lot of choice when it comes to AC tools and Refrigeration tools come in a variety of different brands wi …