Practical Guide to Choosing the Right Radiator Size and Dimensions

When selecting a new radiator, not only its heat output and design play an important role, but also the correctly chosen dimensions. The appropriate width, height, and radiator type affect not only heating efficiency, but also the aesthetics and spatial arrangement of the room. The KORADO brand, as a leading Czech radiator manufacturer, offers a wide portfolio of models that cover all common and specific dimensional requirements.

To help you navigate the product range, we provide an overview of the most common and widely used KORADO radiator dimensions, including practical recommendations on how to choose the right type for your home or commercial space.

Overview of Basic KORADO Radiator Dimensions

Most Common Radiator Heights

For KORADO panel radiators, the most common heights include:

• 300 mm, 400 mm, 500 mm, 600 mm, 700 mm, 900 mm
• Special models are also available in a height of 200 mm (e.g., for low window sills)
• Design vertical models can reach up to 1800 mm

Examples of specific ranges:

• RADIK KLASIK – heights from 200 to 900 mm
• RADIK CLEAN VKM8 – heights: 300 to 900 mm
• RADIK V-POWER – heights: 524 mm, 624 mm, 924 mm

Most Common Radiator Lengths (Widths)

The length of panel radiators most commonly ranges from:

• 400 mm up to 3000 mm

Popular options in standard households include:

• 600 mm, 800 mm, 1000 mm, 1200 mm, 1400 mm

Almost all models (e.g., KLASIK, VK, VKM8, PLAN, LINE) are available in more than 15 lengths in 100 mm increments.

Radiator types have different thermal characteristics – the more panels and convection fins, the higher the heat output at the same dimensions. For PLAN and LINE versions, radiators are +2 mm deeper and are not produced in Type 10.

How to Choose the Right Radiator Dimensions?

1. Measure the Space

Measure the location where the radiator will be installed:

• Height above the floor and below the window sill
• Width of the available wall space
• Depth, if space is limited (e.g., behind a door)

2. Calculate the Required Heat Output

Each room requires a different heat output depending on:

• room volume
• insulation quality
• room position within the building (corner room, attic, etc.)

TIP: You can learn how to calculate radiator heat output in our dedicated article.

3. Choose the Connection Type

KORADO offers several connection options:

• Side connection (KLASIK) – traditional solution suitable for renovations
• Bottom centre connection (VKM8, PLAN, LINE) – modern look, hidden pipes
• Special types (VKU, VKL, COMBI) – flexible combinations

TIP: Replacement of old sectional radiators – if you are replacing an old sectional radiator, the ideal choice is RADIK KLASIK - R. It is designed to best match the original dimensions and connection spacing. Using the RADIK-R conversion table, you can easily find the corresponding new size.