Man & Woman in front of a checkpoint

A more efficient GTB

Are your automated systems still aligned with your actual usage? Powesco evaluates your BMS system, identifies control deviations and provides you with a costed optimization plan — including compliance with the BACS Decree.

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  • RGE & ISO 9001 certified
  • BACS Decree — Compliance Verified
  • Available aid and funding

Request a BMS audit

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01 84 19 86 88 Mon–Fri · 9am–6pm

⚠️ BACS Decree: Since January 1, 2025, all commercial buildings with a heating or cooling capacity exceeding 290 kW must be equipped with a certified automation system. Powesco verifies and documents your compliance.

Our Auditing Expertise

Energy audit, Building Management System (BMS) audit, HVAC audit, PV study, Storage & Charging Station , Decarbonization

What is this

The GTB audit, the first step in your management strategy

In practice

  • For whom?

    Companies, communities, industrial sites and real estate assets with a BMS system — recent or old, certified or not.

  • When ?

    BACS decree (compliance obligation), consumption drift or voluntary approach to optimize management.

  • Duration

    2 to 4 weeks for a standard site, up to 6 weeks for a complex industrial site.

  • Result

    GTB audit report, prioritized optimization plan with estimated gains, BACS compliance file.

Technicians analyzing a building management system

A building management system (BMS) audit identifies discrepancies between what was programmed and what actually works. Our engineers analyze automation systems, control strategies, and monitoring data to build a prioritized, quantified, and immediately actionable optimization plan.

  • Complete mapping of the BMS architecture
  • Analysis of automated systems and occupancy scenarios
  • Audit of programming and regulatory strategies
  • Alarm and instruction management control
  • Verification of consumption tracking by usage
  • Compliance file BACS Decree
  • Building management system optimization plan with prioritization and estimated gains

What our BMS audits reveal

  • Up to 35%

    savings related to piloting

  • < 1 year

    average ROI

  • Up to 70%

    of the audit cost covered

  • 350+

    audits carried out in France

What you get

A 5-step building management system audit — from diagnosis to optimization

From initial mapping to actionable optimization plan — without operational interruption.

  • Inventory and mapping

    Inventory of all connected equipment: PLCs, sensors, controllers, supervisory interfaces. Mapping of the architecture and verification of functional coverage with regard to BACS requirements.

  • Analysis of automation and programming

    Review of occupancy scenarios, time slots, zone-specific instructions, and restart protocols. Verification of consistency between the programming and the actual use of the facilities.

  • Audit of regulatory strategies

    Analysis of heating laws, regulation curves, priority management and interactions between systems. Identification of conflicts, deviations and parasitic consumption.

  • Monitoring and alarm verification

    Control of alarm management, data traceability, quality of consumption monitoring, and completeness of historical data. Compatible with SEME NEXTEP.

  • BACS optimization plan and file

    Summary of gaps, prioritized action plan with estimated gains for each lever, and preparation of the regulatory compliance file for the BACS Decree ready to be submitted.

Romaine Mazoire

Romaine Mazoire

Energy Manager at Powesco

THE EXPERT'S WORD

A useful audit is one that leads to decisions

The value of a building management system (BMS) audit is not measured by the number of metrics analyzed, but by its ability to translate findings into concrete actions. At Powesco, every recommendation is prioritized, costed, and designed for rapid implementation—with a clear vision of expected gains and available support

Our Solutions

Other areas of expertise: Audit & Engineering

Energy audit for businesses

Energy audit

Comprehensive analysis of your energy consumption, usage mapping, and a prioritized action plan with ROI for each measure. Compliant with the Energy Directive 2012/27/EU.

Learn more
Technician performing an HVAC audit on a building installation

HVAC Audit

Complete diagnostic of your heating, ventilation, and air conditioning equipment. Identification of overconsumption and modernization plan with ROI.

Learn more
Photovoltaic roof / storage

Photovoltaic study, storage, charging station

Technical and financial feasibility of a self-consumption installation. Sizing, connection study and profitability simulation.

Learn more
Decarbonization & CSRD

Decarbonization & CSRD

Carbon Footprint Scope 1, 2, 3. Emissions reduction plan, SBTi trajectory, CSRD-ready extra-financial reporting and ISO 14001 compliant.

Learn more

Our references

Concrete projects,
tailored to each context

Discover projects similar to yours, classified by sector and type of intervention.
See all our references
EQHO Tower — Paris La Défense
La Défense (92) • 40 floors
HVAC Energy Management GTB offices

EQHO Tower — Paris La Défense

Energy performance as a lever for profitability

Complete energy transformation of a 79,200 m² office tower with €5.8 million in financing over 5 years. Deployment of an advanced building management system and HVAC optimization to maximize performance without compromising comfort.

Challenges

Improve the energy performance of the tower while optimizing operating costs without impacting occupant comfort.

Work completed

• Deployment of an advanced building management system (BMS)
• Optimization of HVAC systems
• Comprehensive energy audit

Measured impact

-24 % energy savings / year
-32 % carbon emissions
Read the full case
Franklin Tower — Paris La Défense
Offices Energy Audit HVAC BMS

Franklin Tower — Paris La Défense

Measured impact

-37 % 5,950 MWh of energy savings per year
-32 % carbon saving
Read the full case
Mercure Courbevoie — La Défense Hotel
Hospitality GTB Relamping

Mercure Courbevoie — La Défense Hotel

Measured impact

-21 % energy savings / year
-29 % carbon emissions
Read the full case

Other projects in the sectors: health, hospitality, logistics, industry, local authorities.

See more projects

Frequently Asked Questions

Frequently Asked Questions

Do you have an energy efficiency project, questions about financing or regulatory obligations? Our experts are here to help.

Speak to an expert

A building management system (BMS) that "works" isn't necessarily an optimized BMS. The automated systems were configured during commissioning and have never been reviewed. Usage patterns evolve, occupants change, schedules are modified—but the programming remains static. A BMS audit identifies these discrepancies and transforms them into immediate savings opportunities, without requiring any construction work.

Do you have any questions? Contact our team

CONTACT US

Let's build your energy project together

Need help with your project?

Customer service available
Monday to Friday from 9am to 12pm

01 84 19 86 88
contact@powesco.fr

Head office

77, rue Marcel Dassault -
92100 Boulogne-Billancourt

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