01
Install
Retrofit sensors across plant, spaces and key circuits — fast to fit and independent of your BMS.
02
Measure
Live rules flag exceptions like early starts, heat–cool clashes, out-of-hours loads and drifting setpoints.
03
Act
Clear actions show exactly what and where to adjust — schedules, setpoints and controls — within your workflow.
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Why it matters
If a meeting room is heated when no one’s in it, or a chiller and boiler pull in opposite directions, money and carbon are burned for no benefit. Smart sensors (temperature, power, occupancy, light, flow/return, DP) provide live evidence so you can switch off what’s not needed and fine-tune what is — without compromising comfort or safety.
02
Typical Inefficiencies We Find
These may sound obvious - how do you know you aren't doing them?
Run-time creep from manual overrides and calendar drift
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Poor distribution causing hot/cold spots across a floor
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03
Our Go-To Sensors
Our top sensors for revealing energy waste and optimising building performance:
Elsys ERS
Temperature, Humidity & Motion
A versatile indoor climate sensor that tracks comfort conditions and space usage. It combines temperature, humidity, and motion detection to give a complete picture of how rooms are performing and being used, all with long-life batteries and simple wireless installation.
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Temperature: -20°C to +60°C, accuracy ±0.2°C
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Humidity: 0–100% RH, accuracy ±2%
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PIR motion detection range up to 5 m
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Battery life up to 10 years (2 × AA)
EMU Professional ii
Professional MID-certified energy meter
A professional-grade energy meter with LoRaWAN connectivity, designed for accurate monitoring of single- and three-phase systems. Trusted for billing, compliance, and detailed energy audits.
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Single-phase and three-phase versions available
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Accuracy: Class 1
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Direct or CT connection options
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MID-certified for billing
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LoRaWAN communication
Tektelic VIVID
Desk occupancy for offices and flexible spaces
A discreet passive infared sensor that shows which desks and rooms are occupied in real time. It helps manage space efficiently, improve workplace experience, and reduce energy wasted on unused areas.
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PIR-based desk occupancy detection
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Battery life up to 5 years
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Small form factor for discreet install
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LoRaWAN Class A device
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Adjustable reporting intervals
Knowledge Base
At Mayfair Office, a high-end multi-tenant building in London, 4D Monitoring deployed wireless temperature sensors across key zones to investigate recurring comfort complaints and high energy use.
The data revealed temperature fluctuations between floors and extended heating runtimes outside normal operating hours. By adjusting setpoints and rebalancing airflow using the live temperature data, the FM team restored stability and reduced wasted energy.
Do we need a BMS?
No. We work BMS-independently and can complement any existing controls.
Can you turn things off automatically?
We focus on visibility and clear actions; where appropriate, we can integrate with your controls team to automate agreed rules.
Will installs disrupt tenants?
Devices are discreet, battery-powered where possible, and fitted around access and H&S requirements.
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