Overview
The Scaler internal GRESB Converter migrates historical sustainability data from the GRESB Asset-Level Spreadsheet submission (ALS) into the Scaler bulk upload Spreadsheet format. The converter provides an initial, structured import of asset-level data, supporting new clients who previously completed GRESB reporting and enabling a faster transition into Scaler.
The ALS does not contain all technical, contextual, or configuration-level details required to produce a complete and fully accurate representation of an asset in Scaler. For this reason, a client review step remains essential to validate that imported data, meter structures, and configurations align with real-world asset characteristics. Scaler’s implementation team remains available to support clarification or review.
1. General assumptions
Unless supplementary documentation or clarifications are provided, the converter applies the following assumptions across all mapped components.
1.1 Asset details
Unit system
All unit system values are assumed to be Metric, consistent with the standardized GRESB reporting format.
Owned since
If the owned since field is not present in the ALS, the converter applies a default date of the first day of the previous calendar year (e.g., 1 January 2023), unless the ALS indicates that the asset became a standing investment within the two most recent reporting periods.
Active in analytics
Assets are assumed to be active in the Analytics Portal by default. This configuration can be modified later at the asset level if required.
Active in reporting outputs
Assets are assumed to be included in reporting outputs unless manually adjusted.
1.2 Floor areas
Unit system
Floor area units are assumed to follow the Metric system.
Gross floor area
Gross floor area (GFA) is inferred using the earliest reporting year available in the ALS.
“Since” dates
If “since” dates are not provided, the converter defaults them to the first day of the relevant reporting period.
1.3 Certifications
Unit system
Certification data is assumed to use the Metric system.
Date obtained
If missing, certification dates default to the first day of the reporting period.
2. Assumptions for utility meters
2.1 Energy meters
Unit system
Energy meter units are assumed to be Metric.
Monitoring method
Monitoring method defaults to conventional meter unless the ALS indicates smart metering or estimation.
Purchased by
The Purchased by field is inferred from the associated Area type (e.g., landlord, tenant).
2.2 Water meters
Assumptions follow the same logic as energy meters:
- Metric unit system
- Default monitoring method of conventional metering, unless otherwise indicated
Purchased byinferred fromArea type
2.3 Waste meters
The same assumptions apply:
- Metric unit system
- Default monitoring method of conventional metering, unless otherwise indicated
Purchased byinferred fromArea type
3. Data not included in the conversion
Non-operational EV charging consumption
Non-operational EV charging data contained in the ALS is not transferred to the Scaler upload template. This data must be added manually and allocated to the appropriate area type (e.g., exterior, common).
4. Recommendations for client data preparation
To support data completeness during migration, certain information not captured by GRESB should be prepared alongside the ALS.
Gross asset value & percentage ownership
The ALS provides Gross asset value (GAV) and Percent of ownership only for the current reporting year. Scaler requires these values for both the current and prior periods; therefore, prior-year values should be added to the Reporting Characteristics sheet of the GRESB export before migration.
Assistance can be provided upon request.
5. Niche and advanced assumptions
5.1 Allocation of ‘On-site generated and exported by landlord energy’
When both common-area and tenant-area meters exist, allocations for on-site generated and exported energy are determined using proportional consumption ratios.
Example input values
- Base area consumption: 800
- Tenant area consumption: 200
- On-site generated & consumed by landlord: 300
- On-site generated & consumed by tenant/third party: 100
- On-site generated & exported by landlord: 2000
Step 1 — Consumption ratio
Total consumption = 1000
- Common areas: 800 / 1000 = 80%
- Tenant areas: 200 / 1000 = 20%
Step 2 — Allocation of on-site consumption (green meters)
Total on-site consumption = 400
- Common areas: 400 × 80% = 320
- Tenant areas: 400 × 20% = 80
Step 3 — Allocation of exported energy
Total redelivery of 2000 is assigned to the on-site renewable energy meter.
Step 4 — Grey meter consumption
- Common areas: 800 − 320 = 80
- Tenant areas: 200 − 80 = 120
This approach ensures consistent proportional allocation across both on-site renewable generation and redelivery volumes.