Posts tagged ‘control’

March 9, 2017, 9:00 am

Project Profile: The Covenant School

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The Covenant School was founded 30 years ago in Charlottesville, Virginia. The lower school, for students in pre-K through 6th grade, is located in a 65,000-square-foot historic brick building dating back to 1935. With almost 300 students, faculty and staff members, the school needs to operate seamlessly so when the old boiler system started to fail, it needed to find a new heating system as soon as possible. The Covenant School selected our Variable Refrigerant Flow (VRF) technology to answer that need, providing zone control, air filtration and the added bonus of cooling.

To find a suitable system, the school called in Jay Taggart, school board member and the President of W.E. Brown, Charlottesville – the project’s installing contractor. Taggart compared two systems – a water-based chiller and VRF – and made a recommendation to the school. He said, “Everyone agreed that ductwork couldn’t happen, and we were worried the roof couldn’t handle the weight of a chiller, so we came in with a CITY MULTI® solution. With CITY MULTI, there wouldn’t be nearly as much equipment on the roof as a water-based solution, making VRF significantly lighter. Also, CITY MULTI offered simultaneous heating and cooling in a real way because of the heat recovery, and a more detailed level of zoning. And because refrigerant piping is smaller than water piping, VRF offered a more compact solution.”

Installation proceeded during the summer while the students were away, ensuring an easy process for the project team and school. Since the completion of the project, the school has seen improvement in comfort and health. Taggart said, “This is the first time the building has ever been fully air conditioned or had air filtration, so the air quality has gone up drastically. Many teachers say they’ve noticed an impact on their health: fewer allergies and colds.”

Between the improved indoor air quality and increase in control, The Covenant School can now offer a comfortable learning environment for its students and teachers year-round. To read more about The Covenant School, check out the case study here.

Written by MitsubishiHVAC
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August 6, 2015, 4:31 pm

Project Profile: Mamaroneck Passive House

August 6_Mamaroneck Passive House Image

A 3,000-square-foot dilapidated house from the 60s stood vacant in Mamaroneck, New York for years. It had a leaky roof, faulty gutters, mold, humidity damage, bad ventilation, termites – even squirrels in the attic. That is until homeowner Veronique Leblanc came along.

Veronique purchased the house because of the location that offered views of the Mamaroneck Harbor and proximity to the downtown village and country club. She knew she had a lot of work to do. An inefficient envelope and outdated equipment resulted in energy costs averaging $10,000 a year, and the home wasn’t even comfortable to live in.

Veronique planned to retrofit the house with a driving goal of saving energy: “For me, the best energy is the one you don’t use.” She attended a New York Passive House event where she met architect Andreas Benzing. Andreas shared her vision, and the two set out to create the Mamaroneck Passive House.

Under Andreas’ guidance, Veronique chose our ductless cooling and heating system. It delivers the extreme efficiency needed to meet Passive House standards; offers complete control over energy usage and savings; and affords personalized, year-round comfort for the family.

The cherry on top: a 70 percent reduction in energy consumption and the Urban Green Council’s Power to the People Award.

November 25, 2014, 2:06 pm

How VRF Zoning Help Hospitals Save


There were 7,156 hospitals in the U.S. in 1975; currently, there are 5,723. The competition among hospitals to attract patients, and thus stay in business, has never been stiffer. As Harvard Business School Professor Michael Porter explained at the recent Hospital of Tomorrow Conference, hospitals that provide the highest value care at the lowest cost will outlast those that don’t, so cost savings is key.

FacilitiesNet.com’s Executive Editor Greg Zimmerman points out that hospitals can start saving with energy management. Hospitals are one of the largest consumers of electricity in the commercial sector so managing a building’s energy usage smartly and efficiently can offer substantial savings. You need to be able to evaluate the building’s performance and have hard data in order to optimize its efficiency and reduce energy costs. “We collect data so we can understand operational and demand profiles. When you focus on how systems are being used, where there is inherent energy waste, you can determine where the energy savings are,” said Michael Della Barba, director of commissioning services at Environmental Health & Engineering, Needham, Massachusetts.

Cooling and heating contributes to nearly half of a building’s energy consumption. So outdated, inefficient HVAC systems can be significant energy drains. Hospitals that choose Variable Refrigerant Flow (VRF) zoning systems make a particularly wise investment. Here’s why:

  • Zoning. Although hospitals provide around-the-clock care, seven days a week, not even half of the facility is used 24/7. You wouldn’t leave every light on in a hospital, only the ones in the occupied rooms. The same is true for HVAC. The zoning capabilities of VRF zoning systems give hospital administrators control where and when energy is spent by conditioning only the areas in use.

  • Control. VRF zoning systems feature intelligent, intuitive controls that allow facility managers to easily and conveniently control the building’s systems. Our CITY MULTI Controls Network lets them set an operating schedule tailored to the needs of the patients, staff and the building.

  • Savings. In addition to lower utility bills, some of our VRF zoning systems are ENERGY STAR®-qualified and can help earn tax rebates. VRF zoning systems are cost effective over time as well. The systems’ payback period is just 10 years.

Click here to learn about hospitals that have benefited from our VRF zoning systems. To read Zimmerman’s full article, click here.

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