Enscape
Comparing Enscape Impact and IES VE
This page compares Enscape Impact and IES VE.
Last updated 1 September 2026
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 |
|---|
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 |
|---|
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 |
|---|
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
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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.
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