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Park Potomac – the new world-class urban village at Seven Locks and Montrose Roads in Potomac, Maryland – is becoming the area’s destination for work, entertainment, gathering of friends, or as a low-maintenance, lavish new home address. This refined, pedestrian-focused “city in miniature” is unprecedented in the Potomac area – or anywhere in the National Capital suburbs. It combines Class A office space, international-quality homes, fine dining and boutique shopping in one stylish setting.
Rendering of Park Potomac . Image provided courtesy of Foulger-Pratt, Developer.
Park Potomac Place is part of the new master-planned community in Montgomery County, MD. In addition to the high-rise North and South Towers of Park Potomac Place, the community offers sophisticated urban brownstone homes, daily retail conveniences, a Harris Teeter grocery store, a Kimpton-brand hotel, restaurants, and mature trees interlaced with pedestrian promenades.
Park Potomac Place is an elegant, ten-story condominium tower with 80 high-end residences and a total space of 250,000 square feet. It includes two levels of below-grade parking, a clubhouse with a clubroom, two fireplaces, a fitness center, guest suites, a circular pool, and a landscaped plaza area. It was developed by Foulger-Pratts and the architect was SK&I Architectural Design Group, LLC.
Park Potomac Place is just off I-270 at Montrose Road, giving you immediate access to the Capital Beltway, major routes throughout Montgomery County, MD, and an easy drive into Downtown Washington, DC. Just minutes from Cabin John Regional Park, the new Music Center at Strathmore, the Montgomery County Convention Center, and nearly a dozen public and private golf and country clubs, Park Potomac Place is literally in the middle of it all. A multitude of shopping and dining experiences can be found nearby at White Flint Mall, Westfield's Montgomery Mall, Potomac Village, and Tyson's Mazza Galleria.
Exhaust fans for the Demand Controlled Ventilation system installed on the roof of Park Potomac. Image provided courtesy of Steve Smollon, United Energy Products.
Energy-efficient Ventilation and Comfort
The original ventilation system design included 14 traditional single speed fans to provide ventilation for the 87 kitchen hoods connected to a total of 14 shafts. These fans were operating at full speed 24/7.
Soon after the opening of the building many residents started to complain about a constant noise from the kitchen hoods and ducts. It was discovered that the fans – although properly sized for the application – were creating such turbulence that sections of the duct were vibrating and thus creating the rattling noise. This ductwork was also amplifying the noise generated by the fans themselves.
During the troubleshooting of the noise problems it was discovered – not surprisingly - that a large amount of conditioned air was exhausted to the outdoors as the exhaust fans were constantly running at full speed. This represented a substantial energy loss but at the same time an opportunity for saving energy. The question was of course how much could be saved and at what cost.
A technical team was put together and found that one option was to install a Demand Controlled Ventilation system – a solution that is “green” and considered a sustainable design. The system consisted of a variable speed exhaust fan that was controlled by a pressure controller. The pressure controller monitors and maintains a constant pressure in the common duct. Whenever a kitchen hood starts or stops operating this changes the duct pressure, so the controller reacts by increasing or decreasing the fan speed to match the actual load.
As the kitchen hoods are typically operating a very short period of time every day, the fans are now operating less than 60 minutes per day at a high speed. That means that the exhaust rate has been reduced dramatically 23 hours per day compared to the traditional exhaust solution.
A test system was installed and confirmed that the exhaust rate was reduced dramatically. In addition the noise problem had disappeared.
Based on the promising results it was estimated that a Demand Controlled Ventilation system could save $77,000 annually just from reducing the exhaust rate and thereby the loss of conditioned air. In addition it was calculated that the energy savings from using a variable speed fan over a single speed fan could amount to over $10,000 annually. This is a total saving of approx. $1,000 per kitchen hood per year!
The total cost, including labor, of replacing the existing fans with a Demand Controlled Ventilation system amounted to little over $60,000. This provided an ultra-short 8 months payback and a 5-year ROI of 632%.
In addition to the energy savings, the Demand Controlled Ventilation systems added comfort by dramatically reducing noise levels and provided a truly “green” and sustainable ventilation solution.
Additional information on EXHAUSTO is available at their website.
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