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 the BTU required is:

Below are a selection of products that meet your needs.

4 Column Cast Iron

BTU 480 - 17080

6 Column Cast Iron

BTU 963 - 25120

BTU 1264 - 3123

Ardent Horizontal 2 Column

BTU 1641 - 4504

Ardent Horizontal 3 Column

BTU 2226 - 8189

Ardent Horizontal 4 Column

BTU 2856 - 8871

Ardent Vertical

BTU 2172 - 8120

BTU 1171 - 2199

BTU 1774 - 2673

BTU 1928 - 9192

BTU 1328 - 2433

BTU 1328 - 2433

Bronte Cast Iron

BTU 756 - 20200

BTU 2599 - 6390

Brunel Horizontal

BTU 2599 - 4827

Brunel Vertical

BTU 4261 - 6390

BTU 614 - 14058

BTU 720 - 897

BTU 1722 - 7344

Cassius Horizontal

BTU 1722 - 4919

Cassius Vertical

BTU 3147 - 7344

Cast Iron Collection

BTU 938 - 5937

Cove Horizontal

BTU 938 - 5118

BTU 1688 - 2900

BTU 1399 - 2388

BTU 1399 - 2388

BTU 1399 - 2388

BTU 1399 - 2388

BTU 1808 - 5937

BTU 1115 - 1475

BTU 1434 - 3483

BTU 839 - 24157

BTU 2427 - 5826

BTU 2155 - 3966

BTU 542 - 12556

BTU 3223 - 6445

BTU 991 - 1329

Essential Ladder Rail (22mm)

BTU 1040 - 2474

Essential Metallics

BTU 827 - 2168

BTU 2136 - 6769

BTU 2115 - 6510

Hawkshaw Electric

Herbie 2 Column

BTU 481 - 8325

Herbie 3 Column

BTU 542 - 12010

Herbie 4 Column

BTU 716 - 15013

BTU 1501 - 1892

BTU 525 - 814

BTU 616 - 890

BTU 693 - 1027

BTU 768 - 1532

BTU 768 - 1532

BTU 584 - 1638

Loxley Cast Iron

BTU 931 - 24440

BTU 1408 - 3446

BTU 962 - 21018

BTU 792 - 983

BTU 1109 - 3777

Metro (Straight)

BTU 1109 - 3777

Modus Electric Horizontal

Modus Electric Horizontal

Modus Electric Lacquered Horizontal

Modus Electric Lacquered Vertical

Modus Electric Vertical

Modus Electric Vertical

Modus Made to Measure

BTU 225 - 49230

Modus Made to Measure 2 Column

BTU 225 - 21390

Modus Made to Measure 3 Column

BTU 318 - 28770

Modus Made to Measure 4 Column

BTU 408 - 35940

Modus Made to Measure 5 Column

BTU 492 - 42270

Modus Made to Measure 6 Column

BTU 582 - 49230

BTU 1641 - 8871

Modus Stocked Lacquered

BTU 1641 - 8871

Modus/Ardent Multicolumn

Moto Horizontal

BTU 1938 - 5323

BTU 4565 - 5705

BTU 1471 - 2450

BTU 2869 - 7457

Newey Horizontal

BTU 2869 - 6625

BTU 3729 - 7457

BTU 1460 - 3693

BTU 1433 - 3777

BTU 1433 - 3777

BTU 1474 - 6124

Pica Horizontal

BTU 2100 - 6640

BTU 4671 - 7010

BTU 2829 - 5654

BTU 1436 - 1910

BTU 667 - 2572

Siena (Straight)

BTU 667 - 2572

BTU 973 - 1947

BTU 973 - 1947

Strata Horizontal

BTU 1433 - 3903

Strata Vertical

BTU 1371 - 6417

BTU 1785 - 3844

BTU 573 - 14467

BTU 1935 - 5773

BTU 1085 - 3835

BTU 597 - 19448

BTU 1232 - 4139

BTU 1328 - 2572

BTU 1328 - 2572

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