News & Events

Meet High-Efficiency Standards with Mitsubishi Electric’s Newest PEAD UnitsMeet High-Efficiency Standards with Mitsubishi Electric’s Newest PEAD Units

These days, high-efficiency homes and buildings are in demand, with owners and facility managers looking to meet green and sustainability certifications by improving their building’s envelope. With the release of two new, smaller capacity sizes of the Horizontal Ducted Indoor Unit (PEAD), Mitsubishi Electric Cooling & Heating is helping contractors meet these standards.

Extending Mitsubishi Electric’s M-Series, the new PEAD units provide lower capacity and higher-static ducted options that meet the demands of today’s high-efficiency homes – such as Passive House and net-zero applications.

The two new PEAD units (PEAD-A09AA7 and PEAD-A15AA7) are compatible with SUZ- and MXZ-series outdoor units and are small enough to be concealed within an attic or closet space.

Other notable features:

  • Wide-ranging external static pressure (0.14 – 0.60)
  • A built-in condensate lift mechanism (27-9/16 in.)
  • Two-stage CN24 auxiliary heat control
  • A built-in CN 105 controls connection and compatibility with other control options including kumo cloud®
  • Available with an MXZ direct port type

For more information on the PEAD horizontal ducted indoor unit, visit

Mitsubishi Electric VRF Helps Modernize Historic Baltimore Mansion

The Garrett-Jacobs Mansion is a historic, four-story home in the Mount Vernon neighborhood of Baltimore, Maryland. Built in the late 1800s, the celebrated building – preserved by state historical easements – has been home base for the Engineering Society of Baltimore, Inc. (Engineers Club) since 1961. Beyond hosting their activities, the Engineers Club also opens up the venue to the community for weddings, banquets and other private events.

A few years ago, the Engineers Club realized patrons required more accessibility to the upper floors of the mansion. The Club decided to build an adjacent 5,600 square-foot tower that connects to the building, providing access to an elevator, stairs, accessible washrooms and additional storage.

Having a long-standing relationship with the Engineers Club, Mitsubishi Electric Cooling & Heating (Mitsubishi Electric) sales representative Smiley El Abd, worked with APG to provide CITY MULTI® Variable Refrigerant Flow (VRF) to serve both the new building and parts of the mansion.

The project, known as the “vertical expansion” has been years in the making. Cory Colassard, vice president of Spears/Votta & Associates, Inc., Baltimore, Maryland, – the engineer responsible for HVAC design – noted that the new VRF system is part of a plan to modernize the mansion’s cooling and heating systems to Mitsubishi Electric VRF.

“This project is an opportunity to improve the building, improve operating costs, give [the Engineers Club] flexibility and allow them to have individual temperature control in multiple rooms,” noted Colassard. “It’s an improvement that’s generating a master plan for moving forward instead of putting a ‘Band-Aid’ on the conditioning issues as they arise.”

After receiving a VRF system donation from Mitsubishi Electric and APG a few years ago to condition the mansion’s library and drawing room, Dale Whitehead, the executive director of the Engineers Club said they’ve been happy to renovate with Mitsubishi Electric again.

“That system has worked perfectly. It’s never broken down, it had minimal cost for maintenance – it’s always worked,” explained Whitehead. “Everyone’s thrilled with how the whole system works. After the original donation we worked on with Smiley – which was so great – it was a no-brainer Mitsubishi [Electric] was who we were going to go to for this project.”

In addition to the four floors of the vertical expansion, the new system conditions some rooms on the second floor of the mansion, areas that previously did not receive AC before. Both ductless and ducted units were used.

Bill Gough, vice president, M. Nelson Barnes & Sons, Inc., Cockeysville, Maryland, the installing contractor noted that the unobtrusive system was ideal for the historical project. “Sound and energy efficiency is always a consideration,” said Gough. “Low impact to the mansion was important.”

The vertical expansion is projected to be finished in Spring 2018. While the Club is for members only, the Endowment Fund provides public access for lectures, concerts and other community events.

A Closer Look Into Training: Instructor and Student Q+A

For over five years, Aireco has offered comprehensive and hands-on training for Mitsubishi Electric Cooling & Heating (Mitsubishi Electric) equipment. In this Q&A, find out the main benefits of enrolling in an Aireco course from the perspectives of a student and an instructor.


Q: What is the main benefit of taking one of these classes?
A: By completing these classes and getting familiar with how a Mitsubishi Electric system operates, you know the first step. You know how it’s supposed to work so you can figure out where it’s going off the rails. In these classes, you get more familiar with the equipment, so, it’s a little less intimidating when you go to install it or service it.

Q: How do you structure the classes?
A: We like to mix as much hands-on instruction as we can with the lecture side of things so students get a better understanding. For the CITY MULTI® class, we also spend time on system design.

Q: Who can take these classes?
A: HVAC technicians, estimators, those doing specifications, engineers…anybody is welcome.

Q: What’s been a popular class topic?
A: One of the biggest mysteries to most students is how one system can heat and cool at the same time, one of the biggest advantages to CITY MULTI heat recovery VRF. We review the refrigerant circuit and we have an animated flow diagram that explains how the system works.

Q: Best takeaway from the class?
A: The biggest advantage we have is backing up the class with local support. I give everybody in the class my card – they have my email and phone number. If they get in a pinch, they can call me, or if necessary, I can swing by the job.



Q: What has your experience been like taking Aireco classes?
A: The instructors knew what they were talking about and everyone was free to ask questions. [We] also got some hands-on experience with the equipment. My time spent there was valuable.

Q: How have you applied your class knowledge to real-life situations?
A: Literally, the week after [the class], I had an issue with CITY MULTI equipment and had to go out and diagnose a system. I actually had to use the software we were taught to use to diagnose the equipment.

Q: What’s a topic Aireco covered that’s proved to be really beneficial?
A: Learning about the Diamond Builder’s System has been a huge benefit to me and that was something Tim [Kemp] actually explained in class…the diagnostic tool for Mitsubishi Electric systems as well.

Q: Have you ever contacted the instructor post-class?
A: I’ve actually contacted him a couple different times regarding Mitsubishi [Electric] equipment. Tim is really knowledgeable and the backup support is a huge advantage.