Nathan Orr

It’s always good to reaffirm some of the basics of energy, work, and matter. The five rules below are some of the most basic and important. The First Law of Thermodynamics States that energy cannot be created or destroyed. It can only change forms or be transferred from one object to another. If you’d like […]

Condensate overflow prevention devices, or float switches, as they are often called, are such simple devices that you wouldn’t think there would be much room for controversy. In my experience, there are few areas of the trade where technician and installer preferences and opinions vary greatly. Let’s start with some float switch basics. Float (condensate) […]

I once heard someone say, and I have since repeated many times, that BTUs ride on the back of cubic feet of air (CFM). As I’ve learned more, I’ve come to the conclusion that the weight or mass of the air passing over the evaporator coil is far more important to understand both in terms […]

 Join industry veterans Tim De Stasio, Roman Baugh, Eric Kaiser, and Nathan Orr as they share their most memorable HVAC lessons learned the HARD WAY. This unfiltered conversation from the 7th Annual HVAC/R Training Symposium reveals the real stories behind costly errors, dangerous situations, and valuable HVAC training moments that shaped their careers. What […]

 In this candid conversation, Nathan and Bryan dive deep into the often-misunderstood world of sales in the construction and HVAC trades. Nathan, who has transitioned from fieldwork to spending roughly 60% of his time in sales, offers a unique perspective on why sales professionals are necessary despite the skepticism they face from tradespeople. The […]

 In this episode of the HVAC School podcast, Bryan and Nathan dive deep into the challenges of humidity control in grocery stores and other refrigerated environments. While the conversation takes several entertaining detours (including discussions about morning radio shows, Indian weddings with elephants, and imaginary lava-heated homes), the core content provides valuable insights for […]