I wrote this years ago, but now this feels like a season of tough decisions. I hope this helps. When you run a small business, you are called upon to make hundreds of decisions, both large and small, but sometimes, there comes a tough decision you REALLY don’t want to make. It’s times like these […]

In a series circuit (loads connected in a row end to end), it's easy to calculate total circuit resistance because you simply add up all the resistances to get the total. In a parallel circuit, the voltage is the same across all the loads; the amperage is simply added up, but the resistance is a […]

This article is written by Sal Hamidi, founder of Productsbypros.com, an innovative manufacturers representative agency that promotes great HVAC/R products through training and media. You can reach Sal at Sal@productsbypros.com.   If we are going to discuss vacuum pump oil, it's important to understand what it is first. Most HVAC application vacuum pumps are rotary […]