Our sole purpose at MTI is to provide the best possible building performance, comfort and safety.

News Ten common issues that can affect functionality of motors and variable frequency drive (VFD) specification.

Common pitfalls in specifying motors and VFDs Ten common issues that can affect functionality of motors and variable frequency drive (VFD) specification. John Yoon, PE, LEED AP, McGuire Engineers Inc., Chicago 01/21/2015   As specifying engineers, we have little control over the applicable efficiency standards and codes that we are mandated to follow. However, we… more »

News Preventative Maintenance Saves you Money

“Why would I need a scheduled maintenance plan on my HVAC equipment?”  We hear that statement all the time.  My best response to that statement goes something like this: • HVAC preventive maintenance plans ensure your heating, cooling and ventilation equipment remains in good repair. By inspecting your systems regularly, our technicians will catch minor… more »

Training STRUCTURE OF A LARGE DDC SYSTEM

A smaller building may have a single, computerized HVAC controller that operates the direct digital control (DDC) system. However, a large building normally requires a more complex system of controllers, divided into separate sections called tiers. This is called the architecture of the system. First Tier The first tier is a central workstation, consisting of… more »

News The Economizer, In A Nutshell

The function of the economizer is, as its name implies, to “economize” or save on cooling costs. Obviously, it costs money to operate the compressor. If the compressor can be shut down and the system still provide adequate cooling, energy savings can be realized. Heat internal to the building, such as people, lights, computers, copy… more »

News Key Revisions to the 2015 Edition of NFPA 70E

Here are the key revisions to 2015 NFPA 70E from this month’s EC & M The 2015 edition of NFPA 70E reflects a major shift in how stakeholders evaluate electrical risk. In support of this, new definitions were added to Art. 100, including Hazard, Hazardous, Risk, and Risk Assessment. Throughout the document changes were made… more »

News Testing, Adjusting, and Balancing for HVAC

The purpose of testing, adjusting, and balancing (TAB) is to assure that an HVAC system is providing maximum occupant comfort at the lowest energy cost possible. Here is information from an article from The National Institute of Building Sciences: Most of today’s newest HVAC systems are being designed with many more individually controlled temperature zones… more »

News Energy Tips for Commercial Buildings

Reprinted from http://green.dc.gov/service/energy-tips-commercial-buildings No-Cost Tips Adjust your thermostat. In the summer, set your thermostat to 78 degrees when the work place is occupied, and 85 degrees or off after business hours. In the winter, set your thermostat to 68 degrees when the work place is occupied, and 60-65 degrees or off after business hours. You… more »

News 5 Keys To Effective Project Meetings

Send out an advance agenda. Do yourself and your attendees a huge favor — send out an agenda in advance. It doesn’t have to be fully detailed. It doesn’t even have to be the final version. But it will serve two purposes — it will tell them that you are organized and ready and it… more »