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How To Choose The Right Size Of Towel Radiator
10
Sep
To choose the right size of towel radiator (also called a towel rail) for your bathroom, you need to consider two main factors:
✅ 1. Heat Output (BTUs or Watts)
You need enough heat to warm the room and dry towels. This is measured in BTUs (British Thermal Units) or Watts.
🔢 General BTU Guidelines (for average bathrooms):
| Bathroom Size | Room Dimensions (approx) | Required BTUs | Required Watts |
|---|---|---|---|
| Small (En-suite) | 2m x 2m | ~1000–1500 | 300–450 W |
| Medium Bathroom | 2.5m x 2.5m | ~2000–3000 | 600–900 W |
| Large Bathroom | 3m x 3m+ | ~3000–4500 | 900–1300 W |
✅ Note: If your bathroom is poorly insulated or has large windows, add ~10–20% more BTUs.
✅ 2. Physical Size of the Radiator
Once you know the heat output you need, look for a towel radiator that delivers that many BTUs or Watts. The physical dimensions depend on:
-
Wall space available (height & width)
-
How many towels you want to hang
-
Pipe centres (if replacing an old radiator)
Example Sizes:
| Radiator Size (H x W in mm) | Heat Output (Watts) |
|---|---|
| 800 x 500 mm | ~300–400 W |
| 1200 x 500 mm | ~500–700 W |
| 1600 x 600 mm | ~800–1000 W |
🛠️ How to Calculate It Precisely:
You can use an online BTU calculator where you input:
-
Room dimensions (length × width × height)
-
Double or Single Glazing windows
-
Type of Room
