Rehabilitaweb your online provider of air conditioning, plumbing and electricity.
Subscribe 💌 CLICK HERE and we give you an ADDITIONAL 5€ DISCOUNT on your first purchase *Minimum order €100

How many elements should a room radiator have?

Aug. 17, 2020

Do you want to know how many emitting elements the radiator in each room should have? We explain how to do it so that your heating system works in the most efficient way.

How many elements should a room radiator have?
How to calculate the number of elements in 3 steps:

Step 1: You must calculate the total size of the room in square meters. To do this, multiply the width by the length of it.

Step 2: Then multiply the square meters of the room by 120 (oversized calorific factor for greater savings: investment in radiators = lower consumption = savings), obtaining with the operation the necessary Kcal in the room

Step 3: Divide the previous result by 150, which is heat emission or Kcal emitted by a standard aluminum element or 500mm between axles and you will obtain the number of elements that your aluminum radiator needs. EYE! Depending on the distance between axes of the element this will emit more or less heat. As usual:

Distance between axes 350 mm - Thermal emission 115 Kcal.

Distance between axes 500 mm - Thermal emission 150 Kcal.

Distance between axes 600 mm - Thermal emission 180 Kcal.

Distance between axes 700 mm - Thermal emission 200 Kcal.

Distance between axes 800 mm - Thermal emission 230 Kcal.


We must take into account that it is convenient to leave 15 cm above and below the radiator for recirculation in its location

DO NOT FORGET that the more radiator elements the hydraulic circuit has, in less time it will acquire the desired temperature, which translates into less boiler operating time, less fuel used and greater savings.

Other related articles

April 13, 2024

How to choose the perfect tools for your garden

Whether you are starting your first gardening project or are a veteran …

April 10, 2024

Light up your garden with style: Tips to create a perfect atmosphere

With the arrival of good weather, outdoor spaces become the heart of …

March 27, 2024

Get your bathroom ready: Practical tips for a renovated and elegant bathroom

The bathroom, that personal and essential space in every home, deserves special …

March 12, 2024

Light up your home and your future: The transition from halogen lights to LED

In the constant search for ways to reduce household costs and improve …

Feb. 13, 2024

Save water and money thanks to Hansgrohe EcoSmart technology

Discover how hansgrohe's innovative EcoSmart technology is leading the way towards a …

Our customers trust us

4.55/5 (2408 votes)

Opinions of our clients


Receive our news

See details + -
By checking this option we will send you the best offers and exclusive promotions and discounts to your email address. You can unsubscribe at any time.

Set your cookies preferences

We use cookies and similar technologies to offer you a personalized, safe, reliable experience and to be able to measure page performance to continue improving our services. For more information or to edit your cookie preferences at any time, check the Cookies policy page
Go out