For the massive 235,000-sq-ft Merrimack County Nursing Home in New Hampshire, the geothermal source available nearby may not have been the fountain of youth, but it did prove key to the center’s “uber-green” mechanical system retrofit. See how the companies involved brought together 16 wells, over 300 water-to-air heat pumps, and the rest of the 615-ton system to serve this 290-bed facility.
This large complex is welcoming a host of new arrivals, from new boilers and chillers to an
overhaul of its hydronic strategy. Avoiding a whole lot of drilling was one benefit of their new design choice. Balancing first cost, maintenance costs, and the system itself were additional positives for keeping all 225 units comfortable and affordable.
A solar array contributed to putting this insurance headquarters in hot water — in a good way. See how those systems teamed with chiller plant improvements to maintain occupant and computer room productivity.
Many engineers tend to avoid or delegate the nitty gritty of a ground source heat pump system, from soil moisture effects to building system (im) balance. It's time for designers to get in the loop. Learn more about Grounded In Reality in the December issue. Other topics in the December issue include health care HVAC, Boilders, check out the Back2Basics, and more.