Passivehouserevolution

The passive home institute of the usa (phius) has developed a voluntary program for checking information about the work of windows in order to issue reliable work information for windows, doors, passivehouserevolution.org and skylights, easily accessible to passive construction practitioners. Manufacturers whose window functionality information is verified by phius can better position their brand in the field by providing practitioners with the information they need to establish high-performance ingredients in their existing projects. Manufacturers seeking that verification provide the necessary product and testing information to phius, from which a custom package of operational documentation is generated. Verified products receive a special application-specific check mark for phius product functionality information after the verification process is completed. The validated product performance values are then published to the performance database of the validated phius window. These proven performance values are also eventually published in video registries, which are suitable for importing into the wufi passive building modeling tool. The phius verified window performance data program is a voluntary program designed to verify the accuracy and consistency of data on the energy performance of windows and their components, necessary for accurate modeling of passive energy balances of buildings. To achieve the best accuracy in building energy modeling, window performance data (e.G. U-values) is needed at the component level, i.E. For the frame and glass separately, so that window performance can be calculated for the exact dimensions and configurations planned in the project. The verification process follows the relevant window modeling protocols and conditions for high-performance windows, doors, and dormers. Phius is pleased to announce the addition of an exciting new way to validate performance data under the phius verified window performance data program.. Under the new program, domestic manufacturers who already have (or are currently conducting) an nfrc rating can use this new calculation method to save time and money while avoiding additional calculation costs. The nfrc calculation method also allows you to compare the performance indicators of north american products with those of european imports, giving passive house consultants and energy model developers performance indicators in a format that can be connected directly to the wufi passive building modeling software and the passive house planning package (phpp). The label for the new “nfrc mode”, called the “blue path”, will have the same format and data types as the en mode label, but is indicated by a blue data label. This path applies the conversion factor to the component-level data from the nfrc calculations. Phius and nfrc have jointly developed a program to train qualified nfrc simulators to perform the proper conversion to obtain blue path data labels as an extension of their regular work on nfrc ratings. The verified product performance values are then provided to phius by the nfrc modeler and published in the phius verified window performance database. For more information about the program, read the full blog announcement here and visit the “take a closer look at the data label " page. Find a qualified nfrc simulator here and submit your product for data validation today. Window performance data validation program compared to the passive building standard certification program. The phius building certification program does not require the use of windows, doors, or dormers for which performance data has been verified by the window performance data validation program. While the phius building certification program does not have " strict requirements” for the maximum u value of a window, the performance of windows affects the interior surface temperature and thermal comfort. However, the passive building standard has maximum values of the building's peak heat load, and since the u value of a window strongly affects the peak heat load, the peak load limit indirectly restricts the u values of a window. However, the designer still has the flexibility to comply with peak load limits, such as reducing the window area or using a better fan instead of increasing the window performance. It is important to note that the data validation program performs calculations according to established criteria to create recommendation checkboxes for which assemblies are recommended for use in which climatic zones. That is, the calculated data has the force of recommendations for building design teams or building certification, but it has the force of requirements for window manufacturers. Products must meet the criteria to get recommendation ticks for different climate zones. Since higher performance is required to get recommendations for colder zones, the data label serves as a selling point for manufacturers looking to position their products in passive construction applications. The performance criteria for climate zones are listed here. The phius building certification program does require a window to be good enough to avoid direct condensation, but this is usually not a limiting factor – a window that gets any ticks under the phius window performance review program will almost certainly be at low risk of condensation in all climates. For reference, the window condensation calculator is linked here. Phius consultants are trained in how to perform basic internal surface temperature calculations. If the planned window u values are significantly higher than recommended for the climate, but the building as a whole meets the peak heat load criterion (more likely to occur for larger buildings), it would be advisable to place heating devices under the windows. Currently, there are still not many options for windows better than r-7, and so they are recommended in zones 6-8, so designers may have to resort to heating under the windows to prevent cold air from accumulating there. The phius building certification program does require windows to be entered into the energy model of the building in their actual size and configuration (each light), with the performance of the frame elements and glass broken separately (as opposed to using the properties of the entire window in the standard size). The phius window data label contains the information needed to model windows at this level of detail, but if the project team wants to use windows not yet evaluated by phius, there are workarounds to get useful data from other (third-party) sources and fill in the gaps with conservative assumptions. High-performance windows are an important part of a passive or high-performance construction project. Efficient windows collaborative (ewc) – focuses on information on how to choose energy-efficient residential windows. A good place to start for diy home designers and homeowners considering window replacement. Evaluates residential and commercial windows, doors, dormers, storefronts, and curtain walls primarily for energy (thermal) characteristics. It has a large online database of rated products, which includes several hundred manufacturers. Evaluates and certifies windows for resistance to air leakage, water penetration and wind pressure, which is especially important in the country of hurricanes. Currently, to get any ticks at all, the set r-value of the entire window must be at least 4.5 (ip units), and be recommended for zone 5, at least r-7. Most window types are 1.23 x 1.48 m in size.

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