Smart Heating and Cooling: Balancing Comfort and Savings
Comfort and savings are not opposites. Buildings waste energy not because people want too much warmth, but because heating and cooling follow a schedule that no longer matches how the space is really used.
A familiar picture: on Monday morning the office is cold because the heating started late, on Friday afternoon empty rooms are still being heated, and in summer the air conditioning cools a meeting room nobody is using. One area is too cold, another too warm, and the bill keeps growing. The cause is rarely faulty equipment. It is usually missing information: nobody knows exactly what the temperature is, where, when and why.
Smart control rests on a simple idea: heat and cool where and when it is needed, and see whether it actually works. It builds on what we covered in Where Does the Energy Go After Hours? and What to Monitor in a Building Before Users Notice.
Why comfort and savings so often miss each other
Most buildings are set up “to be safe”: heating and cooling follow a fixed schedule that never adapts to the weather, occupancy or use of the space. Complaints are then answered across the board, for example by raising the temperature in the whole building even though the problem is in one room.
The most common causes:
- One temperature for everything – office, warehouse, stairwell and meeting room share the same setting.
- Fixed schedules – start and stop times ignore outdoor temperature and when people actually arrive.
- Heating and cooling working against each other – zones heated and cooled at the same time.
- Nobody sees the real temperature – control relies on one sensor in a poor location, or only on complaints.
- Manual overrides that stay – a temporary change quietly becomes permanent.
What really drives comfort
Comfort is not just the number on the thermostat. Air and surface temperature, humidity, air movement and air quality all matter, so it pays to measure more than one quantity. Workplace environments are also covered by hygiene requirements (in the Czech Republic, for example, Government Regulation No. 361/2007 Coll.), and since the limits have changed in the past, always check the current wording.
| Quantity | What it affects | Typical sensor |
|---|---|---|
| Air temperature | Basic feeling of warm and cold | Room sensor in each zone |
| Relative humidity | Dryness, stuffiness, condensation | Combined temperature and humidity sensor |
| CO₂ | Air quality, need for ventilation | CO₂ sensor in meeting rooms and offices |
| Occupancy | Whether heating or cooling is needed at all | Motion or presence sensor |
| Outdoor temperature | Start times and weather-compensated control | Outdoor sensor |
| Equipment status | Operation, faults, overheating | Data from boiler, pump or air handling unit |
Core techniques of smart control
Zoning. Divide the building into zones by use. A meeting room, open office, warehouse and showroom each need their own mode.
Schedules based on real operation. The plan follows a calendar: working days, weekends, holidays and reduced-use afternoons.
Setback outside operating hours. Lower the temperature when nobody is in the building. Sources quote savings in the range of a few percent per degree for an eight-hour setback, but the spread is wide and depends on the building and the heat source. With heat pumps, a deep setback can reduce efficiency, so it is set cautiously.
Optimum start. The system works out from indoor and outdoor temperature when to begin so that the zone reaches the target just as people arrive, neither earlier nor later.
Presence-based control. In rarely used rooms such as meeting or training rooms, the mode follows whether anyone is there.
Weather-compensated control. Heating water temperature follows the outdoor temperature, so the system does not overheat.
No simultaneous heating and cooling. A simple rule that removes one of the most expensive types of waste.
Rule of thumb: Measure first, then intervene. Without zone temperature data it is easy to “fix” a room that has no problem while the real source of discomfort stays.
Examples from different types of premises
Office. Zoning and schedules based on actual arrival times usually bring the biggest gain. Meeting rooms and shared areas are controlled by occupancy and CO₂.
Retail unit. Open doors, shop windows and customer traffic change the heat load through the day. The sales floor needs to be separated from back rooms.
Warehouse. Heating or cooling an entire hall to one temperature is often unnecessary. It is usually enough to hold conditions only where people work or where stored goods require it.
Studio and showroom. Sensitive materials and exhibits need stable temperature and humidity, so monitoring matters even at low occupancy.
Premises with technology. Heat-producing equipment can load the cooling unnecessarily if nobody tracks where the heat actually comes from.
Heating, cooling and photovoltaics
If the building has solar PV, it makes sense for temperature control to know about production too. For example, pre-cooling or pre-heating while the plant is generating may use more of your own energy than moving the same load to a time with no production. The actual benefit depends on the heat source, the building’s thermal storage and the plant size, so it cannot be promised in advance. The point is to see production, consumption and temperatures in one view and decide from data.
How to start
- Map the current state. Where the sensors are, which zones exist, who sets the system and on what basis.
- Measure temperatures and consumption for at least a few weeks, including weekends.
- Find the biggest gaps between what happened and what was needed.
- Adjust schedules and zones and watch the effect on comfort and consumption.
- Add alerts for deviations so settings don’t drift back.
- Expand gradually to more zones, floors and sites.
Checklist: comfort without waste
- Zones by use – offices, meeting rooms, warehouses and back rooms each have their own mode.
- Sensors in the right places – not by a window, radiator or air duct.
- Calendar-based schedules – working days, weekends, holidays and exceptions.
- Setback and optimum start – set with the type of heat source in mind.
- No simultaneous heating and cooling – enforced by a rule, not by memory.
- CO₂ and humidity monitoring – in busy rooms.
- Deviation alerts – too warm, too cold, equipment running overnight.
- Complaint overview – every complaint is a signal, not just a reason to raise the temperature.
- Review after each change – verify the effect on data.
FAQ
How much can smart control save?
It depends on the building, the heat source and the current settings. Sources quote very different figures, so it is wise to rely on your own before-and-after measurements rather than general promises.
Will comfort suffer if we start saving?
Not with good setup. Savings come mainly from heating and cooling that isn’t needed, meaning outside operating hours and in unused zones. Comfort often improves, because overheated and under-heated spots get fixed.
Do we have to replace the boiler or the air conditioning?
Often not. A lot can be gained by adding sensors, improving settings and linking existing equipment. Replacing a heat source is a separate decision.
Is it a good idea to lower the temperature a lot at night?
It depends on the heat source and the building. With some systems, such as heat pumps, a very deep setback can lower efficiency, so it is set for the specific equipment.
How do we know it works?
From the data: zone temperatures during operating hours meet requirements, consumption outside operation is lower, and complaints go down.
From sensor to real action
Temperature control is only useful if you can see what is really happening. Temperature, humidity, CO₂ and occupancy sensors and equipment data therefore come together in one place and are clearly shown in the INTECHI client zone. When a zone overheats for long or the air conditioning runs outside its schedule, the alert goes to the person who handles it, and in one step it becomes a service request in INTECHI Digital Management. Equipment is registered, so it is clear which heat sources and units belong to which site. You can start with one zone or one floor and add more over time. More context is on the Smart Technologies page at intechi.cz.
How INTECHI approaches it
INTECHI TECHNOLOGY connects sensors, control and monitoring of heating and cooling in one view, together with photovoltaics where relevant, so comfort is set from data. We use the same technology as INTECHI at intechi.cz. If you want to know where your building heats and cools for nothing, get in touch.