Water-loop heat pumps and net-zero

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Designing net-zero-energy buildings for new construction or renovation presents many challenges. It requires analyzing the unique energy use of the entire facility and then designing a system that can reduce the net-energy footprint without sacrificing functionality or comfort. As energy consumption is reduced, onsite renewable energy plays a larger role in efforts to reach the goal of net-zero energy. Water-source heat pumps (WSHPs) can be important in this respect.

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Innovations reduce air leakage for energy efficient rolling steel door

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Until recently, air leakage was not a consideration in the rolling steel door industry. It was thought to be an impossible task—how do you stop air from coming through a door that is slatted? However, as codes became more stringent regarding reductions in air leakage, it started limiting the ability for architects to specify the best closure product for their application.

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Water-source VRF Zoning 101: Combining geothermal with variable refrigerant flow

Photo © OnSite Photography

Variable refrigerant flow (VRF) HVAC zoning and geothermal systems are two of the most energy-efficient options for heating and cooling available—now, new hybrid assemblies combine the two. This article provides an overview of geothermal (or water-source) with VRF zoning technology and its advantages compared to traditional geothermal systems, air-source VRF zoning systems and conventional HVAC systems. In addition, the article will discuss considerations for specifying water-source VRF zoning systems and provide case studies of successful applications.

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Saving on Natatorium Energy Costs with Green Options

Photos courtesy Jarmel Kizel Architects and Engineers

New technologies can provide optimal natatorium environmental control and energy savings. Today’s indoor pool dehumidifiers and outside air ventilation systems technology has changed so much over the last decade, a new or retrofitted natatorium stands to save millions of dollars in energy costs over the 15 to 25-year lifecycle of the equipment. Equipment comes with reduced refrigerant charges of up to 85-percent, compressor heat recovery for free pool water heating, exhaust heat recovery for preheating outdoor air, modulating controls for pinpoint temperature and humidity control, glycol heat rejection to dry coolers, and web-based microprocessor monitor, alarms, and control for factory technician review.

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Being Radiant: Planning in-slab hydronic heating and cooling

Photo © Tim Griffith

In-slab hydronic radiant heating and cooling systems, along with downsized forced-air systems, are gaining popularity as a means of optimizing thermal comfort while reducing energy consumption. Typically designed in conjunction with radiant heating, radiant cooling systems circulate cooled water through the same network of pipes where warm water circulates during the heating season. This network of pipes can turn the floors, walls, and ceilings of a conditioned space into cooled surfaces that evenly absorb heat energy.

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