Journal

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Explainers

Inside the plant room: what a BMS really controls

Chillers, air handlers and valves explained for people who sign off the energy budget.

AB

Aisha Bello

Chief Engineer, Brightmoor Health

Sep 30, 2026

8 min read

Pipes and machinery in a dimly lit basement plant room

In short

Chillers, boilers, air handlers and valves do the heavy lifting

A BMS follows rules but cannot tell when they go stale

Ohmwood writes better setpoints back every five minutes

Every commercial building has a room most people never visit. It is where the energy actually gets spent.

The big four

Chillers make cold water. Boilers or heat pumps make hot water. Air handling units move air through the building. Valves and dampers decide where all of it goes.

A building management system, or BMS, is the software that switches all of these on and off.

A BMS is very good at following rules and very bad at noticing when they no longer make sense.

Where Ohmwood fits

Ohmwood does not replace the BMS. It sits on top, reads the same points, and writes better setpoints back every five minutes. Your engineers keep full control and can override anything.

By the numbers

4

Systems that use most of a building's energy

Written by

AB

Aisha Bello

Chief Engineer, Brightmoor Health

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Find out what your building wastes.

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Buildings online

2,418

sites

Saved today

61,240

kWh

Avoided this year

14.8

kt CO₂e

Average comfort

97

/ 100

The energy autopilot for commercial buildings. Quietly re-tuned every five minutes, from Rotterdam.

All systems green

ohmwood

© 2026 Ohmwood B.V. All rights reserved.

Made for buildings that never sleep

Buildings online

2,418

sites

Saved today

61,240

kWh

Avoided this year

14.8

kt CO₂e

Average comfort

97

/ 100

The energy autopilot for commercial buildings. Quietly re-tuned every five minutes, from Rotterdam.

All systems green

ohmwood

© 2026 Ohmwood B.V. All rights reserved.

Made for buildings that never sleep

Buildings online

2,418

sites

Saved today

61,240

kWh

Avoided this year

14.8

kt CO₂e

Average comfort

97

/ 100

The energy autopilot for commercial buildings. Quietly re-tuned every five minutes, from Rotterdam.

All systems green

ohmwood

© 2026 Ohmwood B.V. All rights reserved.

Made for buildings that never sleep

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