Confirmed
Available evidence supports the finding.
Example: AHU-2 runs in occupied mode overnight on 23 of 28 nights in trend history.
Your building engineer’s AI assistant
Is your BMS working as intended?And are you getting the most
from its data?
Many BMS installations are incomplete, insufficiently commissioned or underused. Gustave finds out where yours stands, then stays connected as your engineers’ AI colleague: spotting issues, explaining why, and learning from every fix.
Read-only connection · Works with your existing BMS · Engineer in control
BMS trends · AHU-2
28 days- Confirmed
AHU-2 in occupied mode overnight
- Needs validation
Supply air sensor reads 4 °C high
The problem
A BMS can be installed without being fully commissioned or used effectively.
Gaps in BMS configuration and commissioning can leave setpoints drifting, overrides in place and equipment operating inefficiently. Engineers spend much of their day responding to alarms, leaving little time to analyse trends or spot issues that never trigger an alarm. They may also lack the specialist support needed to investigate what the data shows.
And when key team members leave, what they know about the building goes with them.
Meet Gustave
Ask Gustave what the BMS can’t tell you.
Gustave starts with a diagnosis of your BMS, then stays connected to work alongside your engineers. Bring it a symptom, a suspicion or a pattern, and it works through the data with you to find likely causes and what to check on site.
Investigate a symptom
“Zone 4 complaints about heat in the afternoon.”
Check a suspicion
“I think the chilled water valve on AHU-2 isn’t closing fully.”
Understand a pattern
“Why does Chiller 3 short-cycle every afternoon?”
Share what you found
“Replaced the actuator on AHU-2 today.”
How it works
From first diagnosis to everyday support
- Step 1
Diagnose
Gustave connects to your BMS with read-only access and reviews points, alarms, schedules, setpoints and trends alongside available as-builts and sequences. It identifies what is working, what needs attention, and where information is missing or incomplete. Every finding is linked to its supporting evidence.
- Step 2
Investigate and plan
Gustave then stays connected. Work through the diagnosis findings together, or bring it new symptoms and suspicions as they arise. It analyses relevant trends, identifies likely causes and useful site checks, and helps engineers turn confirmed findings into prioritised actions. It shows energy and cost impacts where the available data supports them.
- Step 3
Record, learn and follow up
Engineers and technicians record what they find, fix or change by voice or text in English, Arabic or Hindi. Gustave organises each update into the building's history. After work is completed, it compares new BMS data with the original findings to show whether the issue has cleared or returned. Each update builds context for future diagnosis.
Optional GMF engineering service
Need help acting on the findings?
GMF can develop remedial designs or detailed scopes of work, then support implementation by contractors appointed by the owner. This optional engineering service is scoped and priced separately based on the findings.
Team updates
What your team knows stays with the building.
Technicians log work in English, Arabic or Hindi. Gustave turns every update into an organised, asset-linked record, so the building’s history doesn’t depend on who is on shift or who has moved on.
- 01
Tell Gustave what happened
Technicians can speak or type an update in English, Arabic or Hindi to record completed maintenance, a repair, an issue or a change. Gustave prepares the entry in English for the shared record and engineer review.
- 02
Gustave organises the record
Gustave turns each update into a structured entry, linked to the relevant asset, date and category.
- 03
See the operational history
Each update adds to the building’s record. Gustave can prepare reports, such as summaries of logged repairs by asset or category, and help identify patterns across buildings under the same management or ownership.
- 04
Build context for future diagnosis
Gustave brings the team’s growing operational history together with available BMS data, helping engineers understand what has changed, investigate recurring issues and make better-informed decisions over time.
Clear findings. Clear limits.
Gustave shows what the evidence
supports and what’s missing.
Each finding is rated by the strength of its evidence. As the engineering team verifies findings on site and adds their observations, Gustave updates each rating to reflect what the evidence now shows.
Needs validation
Data suggests a problem, but the engineer should check it on site.
Example: Supply air sensor reads 4 °C above its neighbours. Verify sensor and point mapping.
Cannot assess yet
Information needed for the analysis is missing.
Example: Only six days of chiller trends are available. Collect more trend data across representative operating conditions.
Coverage gap
Equipment is not connected to the BMS, so Gustave cannot assess it with BMS data.
Example: Domestic hot water plant has no BMS points. Consider monitoring or a site inspection.
For owners & asset managers
A clearer basis for deciding what to address.
Gustave helps your engineering team reduce avoidable energy use, improve comfort and keep building operations reliable. Clear findings, likely causes and estimated impacts show you what needs attention, where to spend and whether the work made a difference.
See where your BMS stands
What’s working, what isn’t and where information is missing, all backed by evidence.
Spend where it matters
Prioritised, evidence-based findings, with energy, cost and carbon impacts where the data supports them, help you decide where to spend and define the work clearly.
Know the work made a difference
After work is completed, new BMS data is compared with the original findings.
Keep what your building knows
Its operational history stays in place through staff and contractor changes, and can be compared across your portfolio.
For building engineers
Support from the first symptom to the follow-up.
- Review BMS trends alongside as-builts and sequences, even when documents are incomplete or out of date.
- Investigate symptoms and test suspected causes against the data.
- Spot faulty sensors, mis-mapped points and schedules that no longer match how the building is used.
- Get a practical site check plan, with evidence organised for every finding.
- Turn confirmed findings into a corrective scope, then check the result.
Engineer
The third-floor office area is too warm in the evenings. Help me investigate.Gustave
Zone temperatures rise after 8 p.m. on weekdays. AHU-3, which serves this floor, switches to its unoccupied schedule at 8 p.m., but lighting and small power loads stay high, which suggests the space is still in use. Check the schedule against how the floor is used.Needs validation
Engineer
Confirmed. A support team now works there until midnight. Extended the schedule to match.Gustave
Finding confirmed and recorded against AHU-3. I’ll compare zone temperatures over the coming week to check whether the issue has cleared.Confirmed
Engineer in control
Built to support engineering judgment.
Gustave supports the engineering team’s investigation and planning. Engineers review the findings, the owner decides whether to proceed, and the work is carried out by the in-house team or appointed contractors.
Read-only BMS
access
Gustave reads BMS data. It cannot write to the system.
No control
actions
Gustave does not change BMS settings or operate building equipment.
Your building’s record stays yours
BMS findings and team updates build a lasting operational history that belongs to your organisation.
Works with your existing BMS
No BMS replacement required. Gustave connects through a supported interface suited to your site.
Deploy your way
Online or fully on site. Your choice.
Choose how Gustave runs based on your site’s connectivity, IT and security requirements.
Gustave Online
Runs in the cloud and connects securely to your existing BMS over your site’s internet connection. Quick to set up, always up to date, with a view across your portfolio.
Best for portfolios and sites with reliable connectivity.
Edge AI
Gustave Box
Runs entirely within your building, with no internet connection needed. BMS monitoring, investigation and building records all stay on site.
Best for sites with limited connectivity or strict security requirements, such as government and critical buildings.
FAQ
Common questions
Does Gustave work with our existing BMS?
Yes. Gustave doesn’t replace your BMS. It connects to the system already installed through a supported read-only interface. It’s designed for a wide range of BMS platforms; we assess compatibility first and confirm the connection approach for each building.
What happens after the diagnosis?
Gustave stays connected. Your engineering team can investigate new issues, record work by voice or text, and check whether fixes have held, with every update adding to the building’s history.
What’s the difference between Gustave Online and Gustave Box?
Gustave Online runs in the cloud over your site’s internet connection. Gustave Box runs entirely within your building, with no internet connection needed. We’ll recommend the right option based on your connectivity, IT and security requirements.
Who owns our data?
Your BMS data and the operational records created in Gustave belong to your organisation. Gustave reads BMS data through a read-only connection and cannot change BMS settings. Your records remain available to you if the service ends.
Which languages can technicians use?
Technicians can record updates by voice or text in English, Arabic or Hindi. Gustave prepares each entry in English for the shared record and engineer review.
What if our as-built documentation is missing?
Upload the design information available. Gustave identifies assumptions and flags where the engineer should verify the installed condition. As your team confirms details on site, they become part of the building’s record.
Can Gustave assess equipment that is not connected to the BMS?
Gustave can identify a coverage gap, but assessing that equipment’s performance requires other data, measurements or a site inspection.
Does Gustave make corrections automatically?
No. Gustave supports your engineering team’s investigation and planning. The owner decides whether to proceed, and the work is carried out by your team or appointed contractors.
Find out what your BMS is telling you.
Start with a diagnosis of your BMS and connected systems. Then keep Gustave alongside your engineering team, investigating issues, recording maintenance and confirming the work made a difference.
Start with a BMS diagnosis
Tell us a little about your building and BMS. We’ll get in touch to discuss compatibility, the right setup for your site, and how Gustave can support your team from the first diagnosis onwards.