HVAC/R Evacuation Quiz August 1, 2021, 3:19 am

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.

Related Tech Tips

The Extension Cord Puzzle
Suppose you have two extension cords. One is a nice, thick #10 50′ cord with good ends, and the other is a crappy #14 25′ cord. Unfortunately, you need to connect them both to get to your drill 75′ away. Which do you connect to the plug, and which to the drill? Come up with […]
Read more
Removing Water From a Float Switch
We all have some weird tools we keep in our tool bags. A baster may look suspicious, but it comes in really handy for removing water from a float switch. This one is extra handy because it comes with a nice tapered bottle brush inside it that works great to clean out the outlet port […]
Read more
20° ΔT (Delta T), A Lazy Rule of Thumb
  What should the delta T (ΔT) be? What do you mean!? 20 degrees, of course! We are referring to the air temperature drop across an air handling unit or evaporator coil in cooling mode. Actually, depending on who you ask, the answer will range between 18-22 degrees Fahrenheit. Heck, I’ve heard some insist that […]
Read more
loading

To continue you need to agree to our terms.

The HVAC School site, podcast and daily tech tips
Made possible by Generous support from