Mitsubishi Electric - HVAC School

Mitsubishi Electric is a leading manufacturer of high-performance ductless and ducted residential heat pumps and Variable Refrigerant Flow (VRF) HVAC systems. Both their commercial CITY MULTI® and residential Zoned Comfort Solutions® lines provide efficiency, personalized comfort, and aesthetic appeal. Their electric-powered systems conserve energy and promote environmental stewardship in any application while also offering a wide range of indoor unit styles. With a nation-wide distribution and support network, Mitsubishi is proud to partner with industry professionals in developing a comfortable, efficient, and high-performing built environment. We are very happy to have Mitsubishi partnered up with us here at HVAC School.

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Rely on Mitsubishi Electric to Deliver VRF Solutions Built for Your Business

Mitsubishi Electric introduced VRF zoning technology to the United States and has continued to advance the category with industry-leading products, training, and support. Our VRF experts have helped solve complex HVAC challenges in buildings of practically every shape and size across the country. Learn how we can help you design the system that’s right for your building.

Products We Love

Outdoor Unit Single-Zone Cooling Only (PUY)

Cooling-only light commercial ductless systems with INVERTER-driven compressors for improved energy efficiency provide 100% cooling capacity even when it's -40º F outside.

Outdoor Unit Water-Source Heat Recovery (WR2‑Series)

Modular heat recovery systems that combine the efficiency of water source with VRF technology.

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A Compressor Diagnosis Scenario w/ Ty Brannaman

Our latest Podcast

HVAC School - For Techs, By Techs

Real training for HVAC ( Heating, Ventilation, Air Conditioning and Refrigeration) Technicians. Including recorded tech training, interviews, diagnostics and general conversations about the trade.

In today’s short podcast, Bryan explores the dangers of cold tanks during refrigerant recovery.

Whenever you have a recovery tank, you only want to fill it to 80% capacity in the liquid state. The same goes for all sorts of vessels (coils, etc.).

However, capacity isn’t the only factor to consider for safety. We need to know what our maximum temperature will be. You will be in greater danger of overfilling a tank when it is cold because higher temperatures increase the pressure. High pressure in a closed space may lead to explosions. When you fill a tank to 80% under cold conditions, normal temperature conditions could put you in the danger zone (let alone temperatures above 100°F).

So, it’s better to determine your tank fill based on densities at the MAXIMUM temperatures you will encounter, NOT for the measurements at artificial cooling conditions (such as when you put the tank in ice water during recovery).

In the end, just be careful when you’re recovering into a cold tank or using tanks when it’s cold outside. That will help you avoid hydrostatic pressure buildup and explosions.

Bryan covers: