Phius+ 2015 passive building standard — north america passive house institute – united states gas out game directions

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Use the clickable map above to find the PHIUS+ 2015 performance metric for your climate. gas quality comparison The map includes performance metrics (calculated based on TMY3 locations) for more than 1,000 locations in North America. Use the nearest point available. In some cases, when there are no nearby or similar locations mapped, it may be necessary to have a custom climate data set generated.

In cooperation with Building Science Corporation under a U.S. gas vs electric oven temperature DOE Building America Grant, the PHIUS Technical Committee developed passive building standards that account for the broad range of climate conditions, market conditions, and other variables in North American climate zones. Here’s what passive designers and builders need to know:

• The three-year study to develop PHIUS+ 2015 yielded a formula that has been used to generate cost-optimized performance targets for more than 1,000 locations. hp gas online registration These metrics represent the "sweet spot"where aggressive carbon and energy reduction overlap with cost-effectiveness. c gastronomie limonest Use the map shown above to find performance targets in your area.

• The air-tightness requirement was reconsidered using dynamic hygrothermal simulations with the aim of avoiding moisture and mold risk in wall assemblies. The airtightness requirements have been adjusted from a limit of 0.6 ACH50 to 0.05 CFM50 and 0.08 CFM75 per square foot of gross envelope area. gas prices in michigan This allows the airtightness requirement to scale appropriately based on building size. Previously, a larger building that met the 0.6 ACH50 requirement could in actuality be up to seven times more leaky in terms of air leakage per unit area through the walls than a small single family home that tested the same amount of volume air change rate. hp electricity bill payment online The logic is that moisture risk is correlated with the leakage rate per unit area of surface rather than the volume rate. This change of scaling aligns with commercial building code and U.S. Army Corps of Engineers practice.

Note: If a building does not pass the initial airtightness test and the extra leakage can be proven to be due to a non-assembly-threatening leakage element such as a vent damper, then PHIUS certification staff (with approval of the Technical Committee) may allow that element to be taped off for the purpose of passing the airtightness criterion. gas efficient cars 2016 The un-taped test result must be used for the energy model.

• Source energy limit is applied to the calculated net of the estimated fraction of onsite PV or other renewable electricity generation that is used onsite as it is produced. This puts PV on a similar footing to how solar hot water is currently treated. For instance, in a typical residence most of the output of a 2 kW PV array would “count”, depending on the climate.

• Shift to mandatory, climate-specific thresholds on specific annual heating and cooling demands and peak heating and cooling loads. These are set at a cost optimal “sweet spot” slightly beyond BEopt’s cost optimum for the project’s climate in order to provide increased resilience benefits. This ensures efficiency measures will have reasonable payback relative to operational energy savings. The peak load thresholds may be adjusted to ensure hourly comfort or the ability of the home to thermally coast through power outages.