InstallQ NEN 1010/3140 VCA & STEK KIWA Call us now
Air conditioning installation
Knowledge base · Technology

Calculating air conditioning capacity

Calculating the correct air conditioning capacity is essential for efficient and effective cooling of your home or business premises. At Energie Install

Calculating the correct air conditioning capacity is essential for efficient and effective cooling of your home or business premises. At Energie Install, we understand the importance of correctly sizing your air conditioning system.

In short
  • Determine the number of cubic metres of the room
  • Choose the right type of air conditioner
  • Pay attention to insulation and glass surface area
cools + heatstwo functions
STEKcertified
quietwhisper mode

Why the correct air conditioning capacity is important

An air conditioner with too little capacity cannot cool the room sufficiently, while an air conditioner with too much capacity consumes unnecessarily high amounts of energy and leads to higher costs. Correct sizing ensures a comfortable indoor climate and low energy consumption.

Air conditioning installation

How to calculate air conditioning capacity

To calculate the air conditioning capacity, you must first determine the number of cubic metres of the room. You can assume an average height of 2.5 metres for this. Next, choose the right type of air conditioner, such as a window unit, split-system air conditioner, or a central air conditioning system. Factors such as insulation and glass surface area also play an important role in the calculation.

  • Indicative capacity: 30-50 Watts per cubic metre

Practical considerations

In addition to the theoretical calculation, there are also practical considerations to take into account. For example, good insulation and a limited glass surface area can influence the capacity. The orientation of the room and the presence of heat sources can also play a role.

Frequently asked questions

What is the consequence of insufficient air conditioning capacity?

An air conditioner with insufficient capacity cannot cool the room sufficiently, which leads to an uncomfortable indoor climate.

How can I increase the air conditioning capacity?

The air conditioning capacity can be increased by installing a larger air conditioning system or by upgrading the existing air conditioner. However, this should always be done in consultation with a specialist such as Energie Install.

Curious about what this means for your home?

Take the free sustainability check with your address; you will immediately see your energy label, roof area and savings opportunities.

Start the free check
Read more

Related articles

How much does an air conditioner cost in 2026? Air conditioning How much does an air conditioner cost in 2026? The price depends on the number of rooms and the capacity. We provide honest guide prices for professional installation. Read the article An air conditioner that also heats: how does that work? Air conditioning An air conditioner that also heats: how does that work? A modern air conditioner does not just cool, it also heats efficiently. We explain how and when that is a smart move. Read the article Air conditioning maintenance: why and how often? Air conditioning Air conditioning maintenance: why and how often? Maintenance keeps your air conditioning efficient, quiet, and hygienic. We explain what is involved. Read the article Multi-split or single-split air conditioning? Air conditioning Multi-split or single-split air conditioning? When choosing an air conditioning system, the question arises: should I choose a multi-split or single-split air conditioner? As an experienced installation company Read the article Air conditioning or heat pump? Air conditioning Air conditioning or heat pump? At first glance, an air conditioner and a heat pump look similar, but they have different functions and applications. Both systems can heat your home Read the article What types of air conditioning are there? Air conditioning What types of air conditioning are there? At Energie Install, you can find various types of air conditioning units suitable for different applications and rooms. In this article, we will discuss the va Read the article Using air conditioning in an energy-efficient way Air conditioning Using air conditioning in an energy-efficient way At Energie Install, we know that air conditioning not only provides cooling but can also take a significant bite out of your energy bill. In this article Read the article Installing air conditioning: the steps Air conditioning Installing air conditioning: the steps Installing an air conditioning system can be a complex task. At Energie Install, we understand that a good air conditioning installation is essential Read the article

Ready to make your home more sustainable?

Request a no-obligation quote or call our advisors. Certified professionals, fixed price, fast scheduling.