EDGE App Known Issues

EEM06 Insulation of Ground/Raised Floor Slab for unconditioned basements

3.0, 3.1

All

EEM06, MEM01

The EDGE calculator can only model the heat transfer of slabs on ground for conditioned spaces.

Project teams shall use base case value when the basement is thermally unconditioned, otherwise the actual U value shall be used for conditioned or partially conditioned spaces. The definition of bottom floor construction in MEM01 remains unchanged.

Open

Future versions will provide additional basement modelling capabilities for heat transfer from the ground.

EEM25 Skylights with no automatic lighting control

3.0, 3.1

All

EEM25

Project teams struggle to claim skylights without any kind of automatic control.

If automatic control from skylights is NOT present, the visual transmission factor in the EEM25 calculator shall be set to 0 to neutralize any impact due to automated lighting control.

Open

To be addressed in future versions of EDGE.

MEM05 and MEM06 – Solid Blocks of Dense Concrete vs Hollow Blocks of Medium Weight

3.0, 3.1

All

MEM05, MEM06

Material Solid Blocks of Dense Concrete has a better Material Efficiency compared to Material Hollow Blocks of Medium Weight of the same thickness.

1. Select the “Concrete Blocks | Solid Blocks of Dense Concrete” with the actual improved case thickness, e.g. 150 mm, write down the Emissions value (kgCO2eq/m2) corresponding to the end use.
2. Select the “Concrete Blocks | Hollow Blocks of Medium-Weight” material and find the thickness value that results in 28% reduction of the Emissions value (kgCO2eq/m2) found in step 1.

Open

To be fixed in future versions of EDGE.

Base case roof U-value for warehouses in India does not align with the construction method in MEM04

3.0, 3.1

Warehouse

EEM05

The base case roof U-value reflects a concrete roof, rather than metal sheets on steel rafter with 2″ insulation.

The new Roof U-Value base case is 3.71 from 2.1. Project teams may claim as savings the difference in cooling energy and fans energy between improved case vs the current and the future roof U-value base case via EEM34.

Open

To be fixed in future releases of the EDGE App.

High Equipment energy in Office buildings

3.1

Office

Energy

The equipment energy fluctuates with the occupancy density value. This may result in unusually large equipment energy demand.

Project teams may leave the “Occupancy Density (m²/Person)” as default value. This step is mandatory if the project team are providing plug loads and equipment energy in the detailed loads.

Open

To be fixed in future releases in EDGE App 3.1 or newer.

EEM18 Base case information for hot water system not shown (App V3.1).

3.1

All

EEM18

Information about the base case system is not shown.

For all fuels, the base case is a boiler with 80% efficiency.

N/A

Not an issue. For information only.

Lighting energy may disappear when EEM24 is enabled.

3.0

All

EEM24

In some circumstances, lighting energy may disappear when measure EEM24 is selected.

Do not activate EEM24 and apply 20% savings in lighting energy via EEM34.

Open

For information only.

COP calculations when combining “No Conditioning Provided” and conditioned spaces.

3.0, 3.1

All

EEM13, EEM16

When projects select “No Conditioning Provided” for some areas and “Heating & Cooling” (or equivalent) for other areas, the COP and distribution system savings is assigned across all the cooling / heating loads (both actual and virtual energy). However, only actually conditioned spaces shall account for the improved case efficiency.

Users shall use EEM13/EEM16 calculator to enter base case for areas where cooling / heating load is not provided (including distribution system), and enter the actual load & COP installed. If numerical calculation methods for load estimation are not available, weighted average by GIA is an accepted method for COP distribution.

Open

For information only.

“Occupancy Density (m²/Person)” field in Serviced Apartments.

3.0, 3.1

Serviced Apartments

Design Tab

The User Entry value for this field shall be cleared/left empty to ensure the internal calculation engine uses the default value of 2 for all associated energy and water calculations.

Project teams shall manually ensure that the occupancy density value are left as default.

Open

To be fixed in future releases in EDGE App 3.1 or newer (25224).

Reporting storage process loads in industrial warehouse buildings.

3.0, 3.1

Warehouse

Design Tab

When data is available and where buildings are fully operational at the time of the certification, project teams are requested to provide an equipment schedule following steps in “Reporting Equipment Loads from Existing Buildings” section in “Part 1 EDGE Building Certification Guidance”. However, equipment loads entered in the “storage” activity are incorrectly not reflected as “equipment energy” in the energy tab.

Include the total process loads (building level) into the Kitchenette area as follows:
(1) Estimate the total process loads (W) at building level. (2) Divide the total process load of the building by the kitchenette area. (3) Enter the calculated Total Equipment Load density (W/m2) in the Detailed Loads Input section of the EDGE App for the Kitchenette area.

Open

To be fixed in future releases in EDGE App 3.1 or newer.

EEM18 Domestic hot water systems in the dropdown are not saved.

3.0

All

EEM18

Project teams may see reductions in the hot water savings are saving the subproject.

Manually Provide users with additional savings via EEM34

Closed

Fixed 8/30/2024. Project teams shall remove savings in EEM34.

Sudden drop in water savings (8/15/2024)

3.0

All

Water measures

A glitch in the database caused overnight changes in water savings in subprojects globally.

N/A. The issue was notified to the IT team for immediate fix.

Closed

Fixed 8/15/2024. Project teams may need to re-calculate and save.

U-value calculations for bottom floors calculations

3.0

All

EEM06

Cooling and heating energy is not correctly calculated with high U-values.

Project teams shall keep base case U-value for bottom floor.

Closed

Fixed in EDGE APP V 3.1

Zero values in thickness or steel rebar

3.0

All

MEM01, MEM02, MEM04

The EDGE calculator assumes the default improved value when either thickness or steel rebar is zero.

Project teams shall input 0.01, instead of 0.0 in either thickness or steel rebar

Closed

Fixed in EDGE APP V 3.1

EEM28 efficient refrigeration for light industry.

3.0

Light Industry

EEM28

Base and improved case for light industry projects with refrigeration cannot be correctly modelled as for warehouses as measure EEM28 is not enabled.

Project teams may use warehouse sub typology.

Closed

Fixed in EDGE APP V 3.1

Fuel for cooking not accounted in emissions and operational costs.

3.0

All

Energy tab

Operational costs and emissions from cooking are not in the energy tab.

Project teams should be aware that costs and emissions do not include cooking energy

Closed

Fixed in EDGE APP V 3.1

#N/A or #DIV/0! In energy, water or materials tabs

3.0

All

Energy, Water, and Materials tab

Project team cannot see the status of the savings achieved.

Try to clear cache and reload the project. Alternatively, revert changes done that caused the issue and report it to edge@ifc.org

Closed

Fixed in EDGE APP V 3.1

Efficient Refrigerators and Clothes Washing Machines

3.0

Serviced Apartments

EEM29

Project teams do not see savings due to refrigeration and appliances.

If all the conditions are met according to the latest user guide, project teams my claim additional 20% savings via EEM34

Closed

Fixed in EDGE APP V 3.1

Materials base case assumptions for Jordan

3.0

All

MEM01, MEM02, MEM04

Base case assumptions do not consider structural considerations for seismic zones.

Project teams may discount structural components and additional reinforcements in slabs as a result of seismic considerations in the building code.

closed

Fixed in EDGE APP V 3.1

Lighting Controls measure does not provide savings

3.0

Various Typologies

EEM24

EEM24 does not provide savings in various typologies.

Project teams may claim 10% savings in lighting energy via EEM34.

Closed

Fixed in EDGE APP V 3.1

Virtual energy for “heating only” and “cooling only”

3.0

All

Energy

When selecting “heating only” in the “detailed input loads” no virtual energy is calculated.

Project teams may only use “No conditioning required” or “Both cooling and heating” in the interim.

Closed

Fixed in EDGE APP V 3.1

WEM02 and WEM04 calculators glitch.

3.0

All

WEM02 and WEM04

Calculators of such measures provide incorrect results

Projects shall do calculation offline and provide a calculated value directly.

Closed

Fixed in EDGE APP V 3.1

EEM33 Onsite Renewable Energy in homes and apartments

3.0

Homes and Apartments

EEM33

The Energy percentage calculated does not match the expected total energy savings

Project teams may go to the solar https://globalsolaratlas.info/map, calculate energy generated, estimate the percentage of electricity when the EEM33 measure is not enabled, and provide the corresponding percentage energy savings in the detailed entry view of the measure.

Closed

Fixed in EDGE APP V 3.1

MEM06 interior walls consistencies between improved and base case

3.1

All

MEM06

The EDGE calculator assumes a higher indoor wall area in the improved case when the detailed entry in EEM0 1 is used.

Project teams may leave the EEM01 calculator empty until this issue is solved.

Closed

Fixed in EDGE APP V 3.1

Instability issues while using V3.1

3.1

All

Energy, Water, and Materials measures

The EDGE app returns #NA when switching across typologies and/or when using two materials in any of the MEMs.

The EDGE V3.0 remains as the default engine until the fixes in the App are deployed

Closed

Fixed in EDGE APP V 3.1

EEM01 Detailed calculator

3.1

All

Energy, Indoor Partition Walls

There are significantly low savings in warm climates and a incorrect interior wall estimation when the detailed entry in EEM01 is used.

Project teams may avoid using the calculator in EEM01 until the fix is implemented.

Closed

Fixed in EDGE APP V 3.1

Multiple typologies areas

3.1

Homes and Apartments

Design Tab

When detailed areas (bedrooms, toilet, kitchen, …) is used, the subproject calculated GIA is incorrect.

Project teams shall use the Area/Unit* (m²/Unit) column and other mandatory columns (marked with *).

Closed

Fixed in EDGE APP V 3.1

EEM16 Space Heating Systems

3.0

All

EEM16

When “Radiant Systems” is selected as distribution system, heating energy reduces dramatically in the improved case.

Project teams shall either model in V3.1 or in V3.0 they must select the default distribution system when modelling radiant distribution systems.

Closed

Fixed in EDGE APP V 3.1

Custom materials in MEM08 creating drastic savings changes when EEM27 is enabled.

3.0

Industrial

MEM08, EEM27

The use of custom materials lacks U-value, which is then not found for calculations for EEM27.

This link between custom materials and energy has been removed in the EDGE App 3.1. Alternatively, users may avoid using custom materials in MEM08.

Closed

Fixed in EDGE APP V 3.1.

Solar PV capacity installed (kWp).

3.0

All

EEM33

The solar PV capacity calculated in the app should not necessarily be aligned by with the actual capacity. This value is used in the back end to estimate the cost metrics, but it is not intended to reflect the actual installed capacity.

Project teams shall ignore the Capacity column in the detailed entry in EEM33. Instead, project teams shall calculate the energy generated using external tools and input the expected yearly energy generated onsite. This column has been removed in EDGE V3.1.

Closed

Fixed in EDGE APP V 3.1

EEM09 baseline values for U-value, SHGC, and VT

3.0, 3.1

All

EEM09

This is a display issue only. The values are being correctly calculated in the back end.

Closed

Fixed in EDGE APP V 3.1 on May 17th 2026.

Incomplete “Net Carbon Emissions” plot.

3.0, 3.1

All

N/A

The emissions for the “Net Carbon Emissions” bar plot, located below the energy graph, does not match with the “Final Operational CO2 emissions”.

Use the “Final Operational CO2 emissions” as main reference. The “Net Carbon Emissions” plot is missing emissions due to hot water energy use.

Closed

Fixed in EDGE APP V 3.1 on May 17th 2026.

“GIA not matching” error message

3.1

All

Design Tab

The sum activity areas and building level GIA show a mismatch error.

Use single decimal values in both the activity areas and the building level GIA. The error message will disappear.

Closed

Fixed in EDGE APP V 3.1 on May 17th 2026.

Base case COP for PTAC and PTHP in Serviced Apartments, Hotel, Resort buildings is unusually high

3.1

Serviced Apartments, Hotel, Resort

EEM13 and EEM16

The estimation of the COP for PTAC and PTHP is based on a defective formula found in ASHRAE 90.1-2016 (SI)Table 6.8.1-4

When base case COP for PTAC and PTHP is higher than 3.2, project teams may claim additional 20% savings in Cooling energy.

Closed

Fixed in EDGE APP V 3.1 on May 17th 2026.

Excessive heating energy in apartment buildings for certain climate zones

3.0, 3.1

Apartments

Energy

Apartments in climate zones 2A, 2B, 3A, 3B, 3C heating energy appears to be overestimated.

Project teams may select the detailed HVAC and only keep as “YES” the heating season months, defined as follows: October to March (Northern hemisphere), or April to September (Southern hemisphere)

Closed

Fixed in EDGE APP V 3.1 on May 17th 2026.

Some systems that required efficiency in COP, but only % is shown

3.0, 3.1

All

EEM13 and EEM16

COP cannot be entered for certain systems in EEM16.

Project teams may input the COP in %. For example, enter 300% for COP of 3.

Closed

Fixed in EDGE APP V 3.1 on May 17th 2026.

Window to Floor Ratio (WFR) calculation.

3.1

Homes and Apartments

Design Tab

The calculation for Window to Floor Ratio (WFR) is incorrect.

Project teams should ignore Window to Floor Ratio (WFR) calculations. Alternatively, they may create a project in V3.0 to visualize the right calculation.

Closed

Fixed in EDGE APP V 3.1 on May 17th 2026.

Heating energy end-use missing.

3.1

All

EEM16

The improved case heating energy end-use is missing when EEM16 calculator is used. As a result, users may have the false impression of excessive savings due to disappearance of the heating energy.

If only one system is used, users may enter information on the main measure, instead of the calculator. If more than one system is used, users are required to complete all three heating system types within the calculator. Systems types that are not present, must be entered as: “Air Cooled DX Unitary Heat Pump”, with 0 kW capacity and 0 COP.

Closed

Fixed in EDGE APP V 3.1 on May 17th 2026.

EEM11 Efficient cooling system 2 calculation

3.0

All

EEM13

The improved case does not reflect the capacity installed in chiller system 2.

Project teams shall avoid using Type 2 systems, by providing 0 in capacity and efficiency. Then use Type 3 where needed.

Closed

Fixed in EDGE APP V 3.1.

EEM18 Base case information for hot water system not shown (App V3.0).

3.0

All

EEM18

Information about the base case system is not shown.

If electricity is selected as hot water fuel, the base case is a heat pump with COP 1. For all other fuels, the base case is a boiler with 80% efficiency.

N/A

Not an issue. For information only.

Default conditioning requirements for cold storage in Warehouses incorrectly labeled as “NON AC & NO HTG”.

3.0

Warehouse

Design Tab

The user guide states that “Activities marked as “NON AC & NO HTG” in the EDGE Default Space Conditioning column are allowed to select “No Conditioning Required””, however cold storage in warehouses is incorrectly marked as “NON AC & NO HTG” in the EDGE App version 3.0, creating the impression that users may selected “Not conditioning required” in this activity area.

The correct EDGE Default Space Conditioning is “AC & HTG”. As a result, conditioning requirements for Cold Storage (or any industrial refrigerated space) must be set as “Both Heating and Cooling”.

Closed

Fixed in EDGE APP V 3.1

Alternative method: Refrigeration energy for Frozen/Cold/Fruit & Vegetable storage areas via SRR in EDGE App V3.0.

3.0

Warehouse

Design Tab

When the project team uses the alternative the compliance method via SRR for EEM28, the first step is to combine Frozen/Cold/Fruit & Vegetable storage areas and add them to “Storage” area, to avoid double counting. However, due a known issue in the EDGE App V3.0, when the all the three industrial refrigeration activity areas (Frozen/Cold/Fruit & Vegetable ) are left as zero, the refrigeration energy becomes zero.

For subprojects registered in EDGE App V3.0, Fruit & Vegetable storage areas must be set at 0.1 m2 (or any value higher than 0), due to a app known issue that has been fixed in V3.1. Alternatively, projects may re-register in the EDGE App V3.1 as proceed as indicated in the user guide.

Closed

Fixed in EDGE APP V 3.1

Simplified method for calculating energy demand for industrial refrigeration areas (Cold Storage, Frozen Storage and Fruits & Vegetables Storage) in EDGE V3.0

3.0

Warehouse

N/A

When the “Alternative method: Refrigeration energy for Frozen/Cold/Fruit & Vegetable storage areas via SRR” in projects for V3.0 is not feasible, the project team may model only cold storage areas in a subproject in EDGE V3.1, using all the actual engineering specifications. The cooling energy for base and improved case resulting from such modelling, can be then “transferred” to the V3.0 subproject as refrigeration energy by adjusting the volume (m3) in “EEM28 – Efficient Refrigeration for Cold Storage” Calculator and claiming the equivalent savings via “EEM34 – Additional Energy Savings Measures”.

For more information see: https://edgebuildings.com/wp-content/uploads/2026/07/EDGE-V3_0-Simplified-Refrigeration-Approach.pdf

Closed

Fixed in EDGE APP V 3.1