Summer heat: how to use your air conditioner wisely for a cool and healthy home

When the thermometer climbs higher than usual in summer, an air-to-air heat pump with a cooling function becomes the most valuable appliance in the home. But cooling is more than pressing a button. How you use the equipment affects comfort, health and electricity use alike. Here are the tips we most often give our clients.

Don't aim for a „fridge“ effect

The most common mistake is setting a very low temperature after coming in from the heat. A large difference between outdoor and indoor air is stressful for the body, and the unit runs at full capacity meanwhile. It is far more pleasant to keep the indoor temperature just a few degrees below outdoors and steady – that way you avoid feeling chilled when you step outside and back in.

Switch on earlier, not harder

An inverter unit is most efficient when running steadily. It is therefore better to start cooling before the room heats up and let the unit run gently than to wait until it is stuffy and then cool at maximum speed. With MELCloud you can switch cooling on from your phone some time before you get home.

Airflow – not at people

Direct the louvres so that cool air travels along the ceiling and spreads through the room. A direct stream of cool air on a person is the main cause of discomfort. Some models, such as the MSZ-LN-VGHZ, have functions that help control the airflow direction according to where people are.

Closed windows and sun shading

• Keep windows and doors closed while cooling – otherwise the unit will be cooling the garden.
• During the day, draw curtains or blinds on the sunny side.
• Air the home early in the morning or late in the evening when it is cooler outside, and if you have a heat recovery unit, let it do this job.

Humidity and clean filters

While cooling, the unit also dries the air, so on muggy days you feel better even at the same temperature. To keep the air clean, clean the indoor unit filters regularly according to the user manual. If you notice an unpleasant smell, dripping water or unusual noise, book maintenance: our specialist will clean the unit and check how it works.

When one unit is no longer enough

If a single wall unit no longer cools the whole house, and it is hard to sleep upstairs or in the bedrooms in summer, consider additional indoor units or an MXZ multi-split system with several indoor units connected to one outdoor unit. Read more in the article multi-split or several units.

Planning cooling this summer? Make a first estimate with the air conditioner planner and send a request – we will select, install and tune a MITSUBISHI ELECTRIC solution that cools quietly and evenly.