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Radiator Sizing Calculator

Lifestyle Tools

Heat load per panel · panels rounded up

Quick Answer

Radiator Sizing Calculator: Heat load per panel · panels rounded up. Radiator Sizing Calculator uses standard everyday life formulas to compute accurate results instantly.

Radiator Sizing Calculator

m²
W/㎡
W
Panels needed20pcs
Room heat load2,400 W
Exact count20

How it works

  1. 1Room heat load: 20 × 120 = 2,400 W
  2. 2Panels needed: ⌈2,400 ÷ 120⌉ = 20 pcs
Load index is a rule of thumb: ~100 W/m² for well-insulated new builds, 120 for standard homes, 150 for older or top-floor rooms. With low-temperature heating (air-source heat pump at ~45°C supply), panel output drops 20-30% - size up accordingly. Underfloor heating is sized by loop spacing instead.

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How to Use

  1. Enter scenario values: fill real-life numbers into the Radiator Sizing Calculator (defaults work for a quick try).
  2. Instant results: everything computes live, no button needed.
  3. Read the advice: results come with practical tips, reference standards and pitfalls.
  4. Compare options: adjust parameters to compare choices side by side.

Key Points

  • Radiator Sizing Calculator is a free online everyday life tool — open and use, no sign-up.
  • All calculations run locally in your browser; your data never leaves the device.
  • Key capability: Heat load per panel · panels rounded up.
  • Results come with formulas and reference tables so you can verify every number.

Formula & How It Works

Radiator Sizing Calculator formula

Radiator Sizing Calculator uses standard everyday life formulas to compute accurate results instantly.

FAQ

How do I use the Radiator Sizing Calculator?
Open the page and fill in the input fields — results update automatically. Heat load per panel · panels rounded up.
Are the results accurate?
Yes. Standard formulas and conversion factors are used and verified.
Is it free? Do I need to sign up?
Completely free. No registration, login or download required.
Does it work on mobile?
Yes. The responsive design works on phones, tablets and desktops.
Is my data saved?
No. Everything runs locally in your browser.

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Source & Updates

Based on common formulas and industry conventions. Last updated: 2025-07

Last updated:

Formulas and content on this page are reviewed by the YiJianSuan team. For reference only — official sources prevail.

Maintained and periodically reviewed by the YiJianSuan editorial team — review process in ourEditorial Policy.

Cite this page: YiJianSuan. Radiator Sizing Calculator[EB/OL]. https://www.yijiansuan.com/en/c/life/radiator

Results provided by this tool are for reference only and do not constitute professional advice.