A healthy indoor climate matters not only for occupants’ well-being, but also for how efficiently heating and air conditioning are used. This is an important topic for homeowners and apartment owners, so it is worth remembering that comfort does not depend on a single parameter, but is the result of different factors that shape the indoor climate.

Key takeaways
- Besides temperature, what determines an optimal indoor climate?
- Why can central heating reduce occupant comfort in winter?
- How does air conditioning affect air quality in summer?
- What should you watch to keep users comfortable in different rooms?
- What steps help maintain a stable, healthy indoor climate all year round?
What makes a good indoor climate?
We speak of an optimal indoor climate when air temperature, humidity, and airflow are right — and when parameters such as the carbon dioxide content of indoor air are right as well. Raising the temperature in autumn and winter or cooling the interior in summer is therefore not enough to guarantee full comfort. Meeting occupants’ needs often requires different installations to work together. The key to better comfort, and to more efficient energy management, is understanding how air conditioning and central heating work.
Indoor climate in winter – what to watch with central heating?
Central heating provides thermal comfort on cold days, but it also creates a risk of overheating rooms, which in turn means both discomfort and, above all, higher energy use. That is why during the heating season it is worth taking care over sensible temperature settings
and watching whether rooms are being heated too intensively.
It helps to monitor temperature in individual zones of the home. A comfortable temperature in the living room is usually 22°C, in the bedroom 20°C with a drop to 18°C at night, and in the bathroom 24°C. Precise temperature control in individual rooms — and therefore comfort without unnecessarily overheating the whole building — is made easier by zonal heating.
Indoor climate in summer – how to use air conditioning wisely?
Air conditioning lets you lower room temperatures quickly and effectively in summer, which can significantly improve conditions for work or rest. An extra benefit can be better air quality, especially if the unit is fitted with filters that remove pollutants and allergens. This matters particularly for allergy sufferers, because dust, fungal spores, or plant pollen in the air have a major effect on how they feel.
It is important to remember, however, that overly intensive cooling and poorly directed airflow can cause drafts and discomfort, so the difference between indoor and outdoor temperature should not exceed 6–8°C.
Ventilation, filters, and settings – rules for proper use
Ventilation plays a major role in maintaining a healthy indoor climate. Regular airing of rooms is important, because it helps avoid stagnant air and a build-up of pollutants and carbon dioxide. Airing rooms in summer also helps lower the temperature naturally, though it is worth doing this when solar gain is not at its peak.
Where possible, use thermostats and time programmers that let you match the operation of heating, ventilation, and air conditioning not only to the household’s daily rhythm and presence at home, but also to the building’s solar cycle.
Servicing the equipment also matters. Regular inspections and air-filter replacement affect the efficiency, durability, and reliable operation of both heating and air-conditioning systems.
Healthy air at home
Indoor climate is worth treating more broadly than temperature alone. In practice it is a matter not only of choosing technology, but also of using it properly. In winter, avoid overheating rooms; in summer, use air conditioning so that it does not cause drafts or overly large temperature differences between the interior and outdoor conditions. If you suffer from allergies, take care of suitable filters and ventilation in the rooms. With good habits you will be able to maintain a healthy indoor climate all year round.
More professional advice can be found on Akademia Ciepła – Termet S.A. on YouTube