Calculations & results

Norm and Method Configurations in vyzn vyzn is designed for the Swiss context (KBOB, SIA 380/1, eBKP-H). There is no country switcher (e.g. to Germany). Within the Swiss framework,… → What is SIA 380/1? SIA 380/1 "Heating demand" is the Swiss standard that defines the calculation of heating demand and the requirements for the thermal building… → What is KBOB and what are KBOB life cycle data? KBOB life cycle data for the building sector is the Swiss data collection with environmental indicators for building materials, building services,… → What is Minergie and Minergie-ECO? Minergie and Minergie-ECO are Swiss building standards for energy-efficient buildings; Minergie-ECO adds requirements for health and building… → What is the EBF (Energy Reference Area)? The EBF (Energiebezugsfläche / Energy Reference Area) per SIA 380/1 is the sum of heated or air-conditioned floor areas. In vyzn, it is defined… → What is GHG (Greenhouse Gas Emissions)? GHG stands for greenhouse gas emissions, expressed in kg CO₂ equivalent (kg CO₂-eq). It is the measure of the global warming potential over the… → What is Gray Energy? Gray energy is the non-renewable primary energy expended for manufacturing, transport, replacement, and disposal of components. The unit in vyzn… → What is SIA 180? SIA 180 is the Swiss standard for thermal protection, moisture protection, and indoor climate in buildings. It is the basis for the summer heat… → What are UBP (Environmental Impact Points)? UBP (Umweltbelastungspunkte / Environmental Impact Points) are based on the Swiss ecological scarcity method. They aggregate various environmental… → What is biogenic carbon? Biogenic carbon is the carbon stored in biomass (e.g., wood), expressed in kg C. It indicates how much carbon is bound in the built-in materials. → In what formats can I export the LCA report? The LCA results can be downloaded as a PDF report per SIA, as a CSV per GHG Protocol, and as a CSV per the Minergie Net Zero standard. → What four environmental indicators does the LCA in vyzn calculate? The LCA in vyzn calculates four environmental indicators at once, each per m² EBF per year: greenhouse gas emissions (GHG) in kg CO₂-eq, gray… → What inputs do I need for an LCA calculation in vyzn? For an LCA calculation, you need an IFC model with quantities, component assignments from the catalog (providing KBOB data), and at least one zone… → What do the thresholds GW1 and GW2 mean in Minergie-ECO? Minergie-ECO checks gray energy and greenhouse gas emissions of construction against two project-specific thresholds: GW2 is the maximum allowable… → What verification types does the Energy Efficiency app support? On the Energy Efficiency page, you select one of the common Swiss verification types: SIA 380/1, MINERGIE-P, MINERGIE-A, or MINERGIE-ECO. The… → Why does vyzn report the LCA "per year" and how is amortization applied? vyzn spreads each component's environmental impact over its service life: a metric "per m² per year" equals the component's total impact ÷… → How do I improve a non-compliant SIA 380/1 verification? You typically improve a non-compliant heating demand through better U-values of envelope components, reduced thermal bridges, or a more compact… → How does the summer heat protection calculation work? The app orders a thermal simulation per SIA 180; it is executed externally and takes up to 5 business days. It then shows metrics such as… → Does the LCA in vyzn include operational energy? No. The LCA app assesses per SIA 2032 the "construction scope", i.e., the embodied environmental impact: manufacturing (modules A1-A3),… → How does the Quantity Takeoff calculate costs from quantities? The app automatically sums model quantities per eBKP-H position; additional positions (e.g., foundation) you enter manually. Per position, you… → What inputs do I need for the energy efficiency calculation (SIA 380/1)? For the heating demand calculation per SIA 380/1, you need: weather station and altitude in the building details, zones with usage and at least… → How does vyzn handle renovations and existing buildings (existing components, demolition, replacement)? vyzn models renovations on three levels: mark the variant as «Umbau» (conversion), tag components as existing, and mark individual material layers… → How do I calculate summer thermal protection in vyzn? vyzn calculates summer thermal protection according to SIA 180 – largely automated. You classify your zones, provide the thermal material… → How do I calculate energy efficiency in vyzn? You calculate energy efficiency per variant in the "Energy efficiency" area – a SIA 380/1 verification computed from your model. Choose the… → How are the limit values for PV systems calculated? The limit values for PV systems are calculated according to the ECO/SIA standard. The calculation is based on the average value in kWp per m² of… → How should the «railing» element be treated in the life cycle assessment? Railings are generally not relevant for the life cycle assessment. You can either delete them or simply leave them unlinked to any building component. → Can I compare variants graphically? Yes, you can compare variants graphically in vyzn. Use the comparison overview to view your variants side by side. → How do I calculate the area and quantity evaluation in vyzn? vyzn calculates the areas automatically in the "Area and Quantity Evaluation" card (currently BETA) on the model/version page: as soon as you have… → How does vyzn determine areas from the IFC model, and which area terms are used? Deep Model Processing does not geometrically recalculate areas; instead, vyzn adopts the area and volume values stored on the rooms in your IFC… → How do I calculate the life cycle assessment (LCA) in vyzn? You calculate the life cycle assessment per variant directly from your model on the "Life Cycle Assessment" page. Prerequisites are a zone with an… → Can I upload only partial models and still get valid results? Yes — partial models are a completely normal workflow in vyzn: you can manage several models and variants side by side for one building. Results… → How are costs calculated in vyzn and can I import my own benchmarks? vyzn offers two ways to work with costs: material costs are calculated automatically from the prices stored in your catalog products, and in the… → How does vyzn calculate areas and lengths? vyzn does not invent geometry: areas and lengths are read directly from the standardized IFC base quantities of your imported BIM model. These are… → How is biogenic carbon calculated? vyzn reports biogenic carbon as a dedicated indicator – transparently and separately from greenhouse gas emissions. The calculation is based on… → How do I calculate material costs in vyzn? Open the "Material costs" page for the desired model version. vyzn matches each component to the corresponding product in your catalog by its name… → How are thermal bridges and shading approximated if the model does not explicitly include them? vyzn calculates according to SIA 380/1 using only the data stored in the model and does not automatically approximate thermal bridges or shading… → What accuracy can I expect in early phases and how do I communicate uncertainties? In early phases (preliminary study/competition), vyzn calculates primarily on the basis of reference values via the SIA 2032 preliminary project;… → How are life cycle stages (A1–A5, B, C, D) represented in vyzn? vyzn calculates the embodied life cycle assessment based on the KBOB 2022 dataset and represents the life cycle stages not as individual EN 15978… →