Tag Archives: retrofit

Natural Gas piping Questions

I recently had a reader ask these questions: How bad is it to use regular galvanized pipe instead of black? How tight should 1/2″ pipe be? I was taught to use sealant dope but to skip the first thread. Should … Continue reading

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Flood Damaged HVAC Equipment

The South Central, Midwest, and the Northeast have seen record rainfall in the last month and, especially, the last couple of days.  Rivers are over flood stage.  Sewer systems could not keep up with all the rain and sewers backed … Continue reading

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Proper Air Conditioning Sizing

I recently received this question from a homeowner who came upon the blog site: Mike I read some of your articles online and am asking for your opinion. I replaced my antiquated system with a new system. I have a 1250 … Continue reading

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THANK YOU!

A couple of milestones were hit recently  — in April, this blog turned 4 years old. It was started in April 2011. Even more amazing is, as of this writing, there have been 400,312 views of the various articles from … Continue reading

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Proper Start-up – Basic Gas pressure

Let’s start with gas pressure. You probably are saying  why? Doesn’t the valve manufacturer and unit manufacturer set those up? That answer is yes & no!  The valves are “factory set” based on a set of parameters in their particular design.  That is … Continue reading

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Heating Season — Air Flow

In the last post we discussed temperature rise and how to check that.We discussed how this affects the proper operation of a furnace and keeps it from operating too hot and cycling on the limit control. We talked about adjusting fan speed  to … Continue reading

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TXV Issues?

The purpose of this post is to provide service guidance to address erratic thermal expansion valve performance which reportedly results in observed high superheat conditions and at times, coincidental with compressor failure in residential and commercial split and package A/C & HP … Continue reading

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