And, there are now more than 1 million square feet of PHIUS+ Certified and Pre-Certified projects across 1,200 units nationwide.The PHIUS+2015 standard is being updated with PHIUS+2018, which is being phased in throughout this year and will eventually replace the original standard. As a result, the cycling of air temperature must necessarily have a greater amplitude than the cycling of the thermal mass temperature. To increase the energy efficiency of a building, a variety of active and passive design strategies can be incorporated. To learn more about the PHIUS+ Passive Building Standard, visit The climate in which a building is located may dictate the type of windows needed. Some examples of passive design features are thick walls, skylights, high ceilings, ventilators and positioning of windows and doors or openings etc.
To be effective, passive cooling techniques need to cool both the house and the people in it — with elements such as air movement, evaporative cooling and thermal mass. AIA, LEED AP BD+C, WELL AP, principal and director of sustainability and energy at Chicago-based “Passive design strategies take advantage of natural energy opportunities as they relate to the location of the building’s site, the local climate (and the site’s microclimate, if relevant), and the properties of building materials,” notes Christine Robbins-Elrod, AIA, LEED AP BD+C, WELL AP, GACP, associate principal at Passive design strategies are a designer’s first opportunity to increase a building’s energy efficiency before going into more advanced building systems.
The impact of intermittent exterior conditions (sun or air temperature) can be “stored” to offset the impact of later conditions that might drive the space temperature in the opposite direction. The cold spots are often hidden corners where mold can grow, rot can develop and bugs can move in without being noticed.”Curtainwalls, light shelves, a slim building design, and an east-west orientation bring daylight to 95 percent of interior spaces at Mundelein High School, Mundelein, Ill., science and classroom expansion.
For Twin Rivers, Lee notes the project used pre-manufactured metal building systems from Butler Manufacturing, Kansas City, Mo.
“To dial the strategy in to the particular climate, we use an energy and moisture-modeling tool, WUFI Passive,” says James Ortega, who is part of the certification staff at PHIUS.
All Australian regions except those above the tropic of Capricorn require some form of passive …
Passive Design Techniques.
“It can produce a hygrothermal model that shows how your building will perform at various times of the day and calendar year.
Passive design strategies are features innate to the form and design of a building that channelize available natural resources to ensure thermal comfort. “You can reach the set point by having natural ventilation work for you with the windows open, so rooms stay cool and the active system doesn’t kick in,” she says.Adding insulation to a building is another passive design strategy. Violators will be prosecuted.We noticed that you may have an Ad Blocker turned on. ‘Passive design’ takes advantage of the climate to maintain occupancy comfort in buildings and associated environmental factors and reduce reliance on active lighting, heating, ventilation and air conditioning systems and can increase energy saving potential by about 40%. “While direct solar heat gain at east and west-facing glazing can be minimized with exterior shading during the months that a building is mechanically cooled, is it easiest to control direct solar heat gain at south-facing glazing where exterior horizontal shading elements can protect the building from direct solar heat gain in the summer months when the sun is highest in the sky and allow the building to take advantage of direct solar heat gain in the winter months when the sun is lowest in the sky.”The building envelope of Legacy ER in Allen, Texas, was optimized for energy efficiency in the hot Texas climate.The PHIUS+2015 Passive Building Standard is the only passive building standard that is based on climate-specific comfort and performance criteria, and the only one that requires on-site QA/QC for certification. If the thermal mass has significant area in the space, its relatively invariant surface temperature can reduce fluctuations in mean radiant temperature, resulting in improved thermal comfort. “It can be more difficult to control direct solar heat gain and glare at skylights, but it helps to orient skylights to maximize daylighting from the north,” Robbins-Elrod says. “Insulation helps the building envelope to resist the conductive flow of heat, and it is typically most effective when installed as continuous insulation (which significantly reduces thermal bridging as compared to cavity insulation),” says Robbins-Elrod.Continuous insulation means the building is essentially wrapped with a blanket of insulation outside the structure to thermally separate the inside from the outside with no thermal bridges. Passive cooling design techniques can be applied to new homes as well as renovations, across a range of different climate zones. A question must then be asked: is that kind of uniform indoor environment really …
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