10 Tips for More Energy Savings with Heating & AC

Rising energy costs make every kilowatt-hour noticeable – and the biggest leverage point is in your own four walls: heating and air conditioning. The good news is that you don't have to replace the entire system immediately to reduce consumption. Often, small adjustments in operation and some targeted measures already bring significant relief.

In this guide, you will find 10 tried-and-tested tips for greater energy savings with heating and air conditioning – from the right room temperature to hydraulic balancing and smart control. The tips are sorted so that you can start immediately with the simplest measures and work your way up to the bigger levers.

Why saving energy on heating and air conditioning is doubly worthwhile

Heating and cooling account for by far the largest part of energy consumption in most households – significantly more than lighting or household appliances. Every optimization at this point therefore has a disproportionate effect on overall costs. At the same time, CO2 emissions also decrease with consumption, so both your wallet and the climate benefit equally.

In addition, there is a third effect that is often overlooked: efficiently operated systems work more gently and last longer. A properly adjusted heating system cycles less often, wears out less, and delivers more consistent heat. Energy saving therefore does not mean doing without, but rather better utilized technology.

Many of the following tips cost nothing or very little – they only require you to consciously engage with your system. This is precisely where the biggest hurdle lies: most heating systems run for years with factory settings that rarely match the actual building and usage behavior. Those who close this gap often save more than with expensive additional technology.

Tips 1–3: Correctly set up your heating system

Tip 1 – Consciously choose room temperature: Even one degree less noticeably reduces heating energy consumption. Not every room needs the same temperature: the bedroom can be cooler than the living room, and rarely used rooms do not need to be fully heated. The important thing is not to let rooms cool down completely, as otherwise moisture damage threatens.

Tip 2 – Use night setback and time programs: Modern controls automatically lower the temperature when you are sleeping or out of the house, and heat up again in good time. This saves energy without you having to wake up in a cold apartment in the morning or freeze in the evening.

Tip 3 – Have a hydraulic balance performed: A specialist company ensures that each radiator receives exactly the amount of water it actually needs. This eliminates overheated and undersupplied rooms and makes the entire system run more efficiently. You can find all details on obligations, procedures, and subsidies in the article Hydraulic balancing: Obligation, costs & KfW funding.

Tips 4–6: Keep heat in the house

Tip 4 – Keep radiators clear and bleed them: Cladding, curtains, and furniture in front of the radiator trap heat, and gurgling radiators with air in the system deliver less output. Both can be remedied with a few simple steps – a bleeding key is all it takes, and the heat reaches the room freely again.

Tip 5 – Ventilate properly instead of constantly tilting windows: Tilted windows cool down walls and window reveals in winter without really exchanging the indoor air. It is better to ventilate briefly and vigorously with widely opened windows – or use a ventilation system with heat recovery, which automatically takes over air exchange and keeps the heat in the house.

Tip 6 – Insulate pipes and niches: Uninsulated heating pipes in cold basements lose valuable heat on the way to the radiator. Pipe insulation is inexpensive, quick to install, and pays for itself in a short time. Radiator niches on exterior walls are also worth a closer look, as the wall there is often particularly thin.

Tips 7–8: Use efficient technology

Tip 7 – Check and modernize old heat generators: The older the boiler, the greater the potential for savings through modern technology. Heat pumps work particularly efficiently, using environmental heat from the air or ground and generating several times the amount of heat from one kilowatt-hour of electricity. An overview of devices and accessories can be found in our category Heat Pumps; whether and how the switch can be state-funded can be found in the guide Heat Pump Funding.

Tip 8 – Operate air conditioning units efficiently: A lot of energy can also be saved when cooling. Do not set the target temperature too low – a moderate difference to the outside temperature is usually sufficient and also healthier. Shading during the day and ventilating in the cool morning hours reduce the cooling load before the technology even starts up. Clean filters and tight connections keep efficiency high; suitable Air Conditioning Accessories can be found in our shop.

Tips 9–10: Smart control and keeping an eye on consumption

Tip 9 – Retrofit smart thermostats and sensors: Programmable thermostats, window contacts, and presence detection ensure that heat and cold are only generated where they are needed. Retrofitting is possible in most apartments without interfering with the heating system and is also suitable for tenants.

Tip 10 – Regularly check consumption: Those who record their energy consumption monthly or track it via an app immediately recognize outliers – such as a constantly running circulation pump or a defective valve. Continuity beats perfection here: even a rough overview prevents creeping increases in consumption from going unnoticed for years. Further approaches to an efficient home can be found in the article Energy efficiency in home technology.

Conclusion: Step by step to lower energy costs

Energy saving in heating and air conditioning is not an all-or-nothing project. Start with the free measures – adjust the temperature, ventilate properly, bleed radiators – and work your way up to the bigger levers such as hydraulic balancing and system modernization. This way, investments are spread out over time, while savings grow month by month. The most important thing is to start at all: every kilowatt-hour not consumed permanently lowers your costs.

Everything for an efficient heat supply – from controls to complete systems – can be found in our Heating category at wohnungstechnik.de.