When teaching students how to use and read a tape measure for the first time, I have a go-to set of items to facilitate the training. I...

The purpose of this HVACR training project is to visually show your students the change in the amount of liquid flowing through a TXV or...

When servicing an air conditioner or heat pump, we often notice a low airflow problem which needs to be fixed. If there is no indoor air...

If you suspect that an evaporator coil is clogged with dust but cannot visually see it, such as when you can't directly inspect on a...