Calculation of heating radiators: selection of sections (Excel)

Calculation of heating radiators: selection of sections (Excel)

How many radiator sections are needed for a room? Calculate in 2 minutes.

You’re a professional or a DIY enthusiast. You know that to choose the right radiator, you must consider room area, ceiling height, radiator type, and system temperature. Manual calculation is time-consuming, and mistakes cost money: too few sections and it’ll be cold; too many and you’ll overpay.

This calculator solves the problem. Enter your data and get an instant answer: exactly how many sections you need for your room.

What it calculates:

- Room volume (area × height).
- Required power based on a standard of 40 W/m³.
- Correction factor for system temperature: hot radiator (1), warm (1.3), barely warm (1.7).
- Final number of sections (rounded up).
- Reference data on heat output for different radiator types.

Why it’s convenient:

- Accounts for actual temperature. In central heating, radiators are rarely very hot—this calculator adjusts for that.
- Simple: pick a number (1, 2, or 3), and the calculator automatically applies the correct coefficient.
- Protected: formulas are hidden, so customers can’t break or misuse them.

Who it’s for:

- Plumbers and professionals—to select radiators accurately.
- DIY homeowners—for personal use.
- Anyone doing renovations.

Important: The heat output per section comes from the radiator’s datasheet. The standard heat requirement is 40 W/m³ (for typical conditions). If the house is well-insulated, you can use 34 W/m³.

File format: Archive (Excel + Word). Compatible with Microsoft Excel and Google Sheets.