Radiator Sizing

Calculate the perfect radiator size for your room using BTU calculations. Get accurate sizing recommendations for optimal heating efficiency.

Room Dimensions

4m
1m50m
3m
1m50m
2.5m
2m10m

Room Volume: 30.00 m³‱Floor Area: 12.00 mÂČ

Insulation & Windows

2
1234
1
0510

Temperature & Orientation

20°C
16°C25°C
-5°C
-30°C10°C
25°C

Energy Cost & Comparison

Radiator Types & Efficiency

Understanding different radiator types and their heating characteristics

Single Panel

Basic radiators for smaller rooms, lower heat output

Double Panel

Higher heat output, ideal for most residential rooms

Designer

Stylish options with variable heat output capabilities

Radiator Sizing Guide

Key factors to consider when choosing the right radiator size

1

Room Size

Calculate room volume (length × width × height)

2

Insulation

Consider wall insulation and window efficiency

3

BTU Calculation

Determine required heat output in BTUs or Watts

4

Radiator Selection

Choose radiator type and size based on calculations

  1. 1

    MÀt rumsmÄtt

    BerĂ€kna rumsvolym: lĂ€ngd × bredd × höjd i meter. Radiatorsizning baserad pĂ„ volym, inte bara golvyta. Högre tak krĂ€ver proportionellt större radiatorer.

  2. 2

    Ange önskad temperatur

    Ange mÄlrumstemperatur: Vardagsrum 20-22°C, sovrum 15-18°C, badrum 21-24°C. Högre mÄl krÀver större radiatorer och ökar driftskostnader.

  3. 3

    BestÀm isoleringsnivÄ

    Bedöm rumsisolering: DÄlig (gamla fönster, oisolerade vÀggar), genomsnittlig (dubbelglasfönster, grundlÀggande vÀggisolering), bra (moderna fönster, vÀl isolerad). DÄlig isolering behöver avsevÀrt större radiatorer.

  4. 4

    Kontrollera flödestemperatur

    Identifiera ditt vÀrmesystems vattentemperatur: Traditionell panna 70-82°C. Kondensationspanna 60-70°C. VÀrmepump 35-43°C. LÀgre temperaturer krÀver större radiatorer - kritiskt för vÀrmepumpsystem.

  5. 5

    VĂ€lj radiatorstorlek

    Kalkylatorn rekommenderar nödvĂ€ndig radiatoreffekt BTU/h eller Watt. Matcha till tillverkarspecifikationer. Vanliga storlekar: 500W-3000W (1.700-10.200 BTU/h). Överdimensionering Ă€r OK (ger reservkapacitet), underdimensionering orsakar kalla rum.

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