Heat Calculator

BTUs are ‘British Thermal Units’, the unit in which radiator efficiency is measured. Factors such as room dimensions, window size and wall material are used to calculate the required outputs of a radiator, in order to heat your room efficiently.

Use our BTU Calculator to determine the heat requirements of your room. Place your details in the corresponding fields and you can calculate the amount of BTUs you need to ensure your space is always warm enough to suit your needs.

BTU Calculator

Room Details

Room:

Height: (m)

Width: (m)

Depth: (m)

Floor Area: (m²)

Window

Area: (m²)

Type:

Surround

External Walls:

Type:

Underneath:

Above:

Room

Enter the details of the room.

Room

Height (m)

Width (m)

Depth (m)

Windows

Enter details about the rooms windows.

Window area (m²)

Window Type

Surround/Insulation

Enter details about the surroundings and insulation.

Number of outside walls

Type of outside walls

What is underneath the room?

What is above the room?

Result

Based on the information provided, your heating requirements are:

Watts @ ΔT 50°C:
Watts @ ΔT 30°C:
BTU @ ΔT 50°C:

Below are a selection of products that meet your needs.

4 Column Cast Iron

Watts 141 - 5000

6 Column Cast Iron

Watts 282 - 7360

Watts 371 - 916

Ardent Horizontal 2 Column

Watts 481 - 1320

Ardent Horizontal 3 Column

Watts 651 - 2400

Ardent Horizontal 4 Column

Watts 804 - 2600

Ardent Vertical

Watts 636 - 2380

Watts 343 - 645

Watts 520 - 784

Watts 565 - 2694

Watts 389 - 713

Watts 389 - 713

Bronte Cast Iron

Watts 222 - 5920

Watts 762 - 1873

Brunel Horizontal

Watts 762 - 1415

Brunel Vertical

Watts 1249 - 1873

Watts 180 - 4120

Watts 211 - 263

Watts 505 - 2153

Cassius Horizontal

Watts 505 - 1442

Cassius Vertical

Watts 922 - 2153

Cast Iron Collection

Watts 275 - 1740

Cove Horizontal

Watts 275 - 1500

Watts 495 - 850

Watts 410 - 700

Watts 410 - 700

Watts 410 - 700

Watts 410 - 700

Watts 530 - 1740

Watts 327 - 432

Watts 420 - 1021

Watts 246 - 31368

Watts 711 - 1707

Watts 631 - 1162

Watts 159 - 3680

Watts 944 - 1888

Watts 290 - 389

Essential Ladder Rail (22mm)

Watts 305 - 725

Essential Metallics

Watts 242 - 635

Watts 626 - 1984

Watts 620 - 1908

Hawkshaw Electric

Watts 900 - 2000

Herbie 2 Column

Watts 141 - 2440

Herbie 3 Column

Watts 159 - 3520

Herbie 4 Column

Watts 210 - 4400

Watts 404 - 554

Watts 154 - 239

Watts 180 - 261

Watts 203 - 301

Watts 225 - 449

Watts 225 - 449

Watts 171 - 480

Loxley Cast Iron

Watts 273 - 7160

Watts 413 - 1010

Watts 282 - 6160

Watts 232 - 288

Watts 325 - 1107

Metro (Straight)

Watts 325 - 1107

Modus Electric Horizontal

Watts 600 - 2000

Modus Electric Horizontal

Watts 600 - 2000

Modus Electric Lacquered Horizontal

Watts 600 - 2000

Modus Electric Lacquered Vertical

Watts 1200 - 1500

Modus Electric Vertical

Watts 1200 - 1500

Modus Electric Vertical

Watts 1200 - 1500

Modus Made to Measure

Watts 66 - 14430

Modus Made to Measure 2 Column

Watts 66 - 6270

Modus Made to Measure 3 Column

Watts 93 - 8430

Modus Made to Measure 4 Column

Watts 120 - 10530

Modus Made to Measure 5 Column

Watts 144 - 12390

Modus Made to Measure 6 Column

Watts 171 - 14430

Watts 481 - 2600

Modus Stocked Lacquered

Watts 481 - 2600

Modus/Ardent Multicolumn

Moto Horizontal

Watts 568 - 1560

Watts 1338 - 1672

Watts 431 - 718

Watts 841 - 2187

Newey Horizontal

Watts 841 - 1941

Watts 1093 - 2187

Watts 428 - 1082

Watts 420 - 1107

Watts 420 - 1107

Watts 432 - 1794

Watts 600 - 1500

Pica Horizontal

Watts 615 - 1946

Watts 1369 - 2055

Watts 829 - 1657

Watts 421 - 560

Watts 196 - 754

Siena (Straight)

Watts 196 - 754

Watts 285 - 570

Watts 285 - 570

Strata Horizontal

Watts 420 - 1144

Strata Vertical

Watts 402 - 1881

Watts 523 - 1126

Watts 168 - 4240

Watts 567 - 1692

Watts 318 - 954

Watts 175 - 5700

Watts 361 - 1213

Watts 390 - 754

Watts 390 - 754

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