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title: "Comparing Enscape Impact and IES VE"
canonical: "https://documentation.chaos.com/space/ENSCAPE/841482280/Comparing%20Enscape%20Impact%20and%20IES%20VE"
format: markdown
---
This page compares Enscape Impact and IES VE. Enscape Impact & IES VE Baseline and Variation Glazing changes comparison The Variations, with respect to glazing, show that changes of 10% and 25% yield very similar improvements in both software applications. Enscape Impact Model IES VE Model Variance Total Energy (MWh) % Difference Total Energy (MWh) % Difference Baseline Simulation Results 520 - 592 - 12% Variation 1, glazing reduced by 10% 487 6.3% 542 8.5% 2.2% Variation 1, glazing reduced by 25% 440 15.4% 493 16.7% 1.3% Further testing is currently being carried out, across more model archetypes and locations, and also design changes. These test results will be turned into a white paper and published with the release. Overall, there is a 12% variance between Enscape Impact & IES VE results. Overall Results Enscape Impact Model IES VE Model Variance Baseline Simulation Results Total Energy (MWh) Total Energy (MWh) Total Energy (MWh) 520 592 12% Heating (MWh) 134 260 48% Cooling (MWh) 33 28 18% Hot Water (MWh) 32 32 0% Lighting (MWh) 167 155 8% Equipment (MWh) 154 116 33% EUI (kWh/m2) 105 119 12% The baseline is within a good tolerance between Impact and IES VE. This is attributed to known factors such as how the geometry is modeled in Impact and differences in the default datasets applied to the model; both factors are expected to improve in the future. Geometry Comparison Enscape Impact Model IES VE Model Variance Spaces (m2) 33 40 21.2% Volume (m3) 7,247 6,699 7.6% Ground floor area (m2) 768 739 3.7% Roof area (m2) 1,315 766 41.7% Internal Floor Area (m2) 2,167 2,167 0.0% Ceiling area (m2) 2,236 2,167 3.1% Total floor area (m2) 2,935 2,906 1.0% External wall area (m2) 1,137 1,278 12.4% External door area (m2) - 3.40 - External glazing area (m2) 95 123 30.5% Enscape Impact runs on the  IES  Apache technology.  For more information, see the  Enscape Impact Video Tutorial . Impact 4.1 and 4.2 Comparisons Click on the image to see it in full screen Impact 4.5 and 4.6 Comparisons We have conducted a detailed comparison between the 4.5 and 4.6 versions. Download the compressed PDFs to see the comparison tables. Click on the image to enlarge it