and overall source energy usage would meet the stringent PHIUS+ certification standards. All structural components were carefully modeled and designed to ensure that thermal bridging was minimized and accounted for in the energy modeling. The high-performance wall and roof systems utilized a combination of HFO low-global warming potential (GWP) spray foam and ultra-low embodied energy plant-based cellulose insulation composed of 85% paper fiber. The high-performance R-8 windows utilize R-11 triple-pane glass with low conductivity frames. Motorized external Venetian window blinds control solar gain and glare to minimize the cooling load and maximize indoor environmental quality for occupants year-round. The ultra-efficient building enclosure allowed the building to be heated with a very simple HVAC system. A single 4-ton variable capacity cold-climate air source heat pump serves the entire warehouse space. The office portion of the building is served by a 3-ton heat pump with an integrated intelligent communication system that provides zone control through modulated dampers and smart controllers. The office space is ventilated using an 87% efficient heat recovery ventilator (HRV), controlled by an indoor environmental sensor that modulates the ventilation rate based on real time occupancy and indoor air quality. b 15
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