What are the 4 key objectives from the programme?

1. Significant electricity and gas savings

2. Increase tenant comfort and reduce complaints

3. Best-practice collaboration between site teams, the landlord, tenants and contractors.

4. Increased efficiency of equipment leading to longer life of key plant

The Programme

The Smart Building Insight Programme aimed to harness innovative smart building technology to drive energy savings through site optimisation. Also core to the project was improving wellbeing throughout the site thus reducing complaints and site call outs.

Through previous work together, The Crown Estate, BNP Paribas Real Estate and Carbon Credentials identified that there was a significant opportunity to improve the energy and carbon performance as well as the wellbeing conditions at Rex House within their St James portfolio.

“The level of insight provided by the programme at Rex House allowed us to quickly achieve significant energy savings and has driven proactive maintenance to rectify site issues.”

– Edward Dowden, Technical Services Manager


annualised savings


reduction in gas consumption


reduction in electricity consumption

The Process

Stage 1:

The initial stage of the programme involved the installation of a Smart Building Gateway, which fed back the buildings BMS data to Carbon Credentials’ online analytics platform, ADAPt. Using machine learning and expert engineering analysis of all site data, a number of optimisation opportunities were identified and implemented, with some opportunities being implemented on day one of the programme.

Stage 2:

This stage utilised 12 IoT sensors that monitored factors such as CO2, temperature, humidity, light and motion. Across Rex House’s seven floors, it had been noted that conditions varied quite significantly which caused wellbeing and comfort issues in certain areas of the building. The installed sensors highlighted these variations, showing temperature spikes outside of the optimal comfort zone; CO2 reaching levels that might impact productivity, and humidity levels that might impact wellbeing.


Collaboration was key in driving the success of the programme and was ensured by parties from BNP Paribas Real Estate, NG Bailey and Carbon Credentials all working together and being aligned in their desired outcome of the programme. Through the data that was visualised on the ADAPt portal a number of energy savings were implemented across the site as well as driving investigations into site conditions.

Implemented Opportunities

  • Optimised plant running schedules

  • Air handling unit supply temperatures were compensated for outdoor air temperature

  • Reduced boiler flow and return temperature

  • Significant temperature variations across floors, led to increased proactive maintenance

  • Pump speed control strategy review

Benefiting BNP Paribas Real Estate

The Smart Building Insight Programme, and in particular the wellbeing sensors, aimed to influence three levels of BNP Paribas Real Estates’ business, the brand, the people and the facilities. Bringing value to each of these level provides substantially more value to a business that just measurable energy savings.


Creation of best in class case study to support marketing and boost company image


Positive interactions with staff and tenants, increasing engagement and wellbeing


Evidence of operational opportunities and clear business cases for capital investment

Contact Us

Please feel free to contact our team to find out how we could support your company on it’s sustainability journey info@carboncredentials.com

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