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Designed to be seen, the DQ Martha Horizontal Radiator 810mm - Premium Colour brings genuine heat output and a considered profile to rooms where a standard panel would let the side down.
Widths and heat output
This radiator is 810mm tall and comes in 30 widths. Outputs are quoted at ΔT50; room coverage assumes average insulation, so if you are between sizes go up rather than down. Ask us if you would like a hand sizing it.
Size (H x W)
Heat output
Watts
Suits a room of about
Product code
810 x 877mm
5,780 BTU
1,694 W
43m²
CR/MAR/810/11-SP
810 x 954mm
6,305 BTU
1,848 W
47m²
CR/MAR/810/12-SP
810 x 1031mm
6,831 BTU
2,002 W
51m²
CR/MAR/810/13-SP
810 x 1108mm
7,356 BTU
2,156 W
54m²
CR/MAR/810/14-SP
810 x 1185mm
7,882 BTU
2,310 W
58m²
CR/MAR/810/15-SP
810 x 1262mm
8,407 BTU
2,464 W
62m²
CR/MAR/810/16-SP
810 x 1339mm
8,932 BTU
2,618 W
66m²
CR/MAR/810/17-SP
810 x 1416mm
9,458 BTU
2,772 W
70m²
CR/MAR/810/18-SP
810 x 1493mm
9,983 BTU
2,926 W
74m²
CR/MAR/810/19-SP
810 x 1570mm
10,509 BTU
3,080 W
78m²
CR/MAR/810/20-SP
810 x 1647mm
11,034 BTU
3,234 W
82m²
CR/MAR/810/21-SP
810 x 1724mm
11,560 BTU
3,388 W
86m²
CR/MAR/810/22-SP
810 x 1801mm
12,085 BTU
3,542 W
90m²
CR/MAR/810/23-SP
810 x 1878mm
12,611 BTU
3,696 W
93m²
CR/MAR/810/24-SP
810 x 1955mm
13,136 BTU
3,850 W
97m²
CR/MAR/810/25-SP
810 x 2032mm
13,662 BTU
4,004 W
101m²
CR/MAR/810/26-SP
810 x 2109mm
14,187 BTU
4,158 W
105m²
CR/MAR/810/27-SP
810 x 2186mm
14,713 BTU
4,312 W
109m²
CR/MAR/810/28-SP
810 x 2263mm
15,238 BTU
4,466 W
113m²
CR/MAR/810/29-SP
810 x 2340mm
15,764 BTU
4,620 W
117m²
CR/MAR/810/30-SP
810 x 2417mm
16,289 BTU
4,774 W
121m²
CR/MAR/810/31-SP
810 x 2494mm
16,815 BTU
4,928 W
125m²
CR/MAR/810/32-SP
810 x 2571mm
17,340 BTU
5,082 W
128m²
CR/MAR/810/33-SP
810 x 2648mm
17,865 BTU
5,236 W
132m²
CR/MAR/810/34-SP
810 x 2725mm
18,391 BTU
5,390 W
136m²
CR/MAR/810/35-SP
810 x 2802mm
18,916 BTU
5,544 W
140m²
CR/MAR/810/36-SP
810 x 2879mm
19,442 BTU
5,698 W
144m²
CR/MAR/810/37-SP
810 x 2956mm
19,967 BTU
5,852 W
148m²
CR/MAR/810/38-SP
810 x 3033mm
20,493 BTU
6,006 W
152m²
CR/MAR/810/39-SP
810 x 3110mm
21,018 BTU
6,160 W
156m²
CR/MAR/810/40-SP
Specification
Range: Martha
Height: 810mm
Finish: Premium Colour
Material: Cast Iron
Orientation: Horizontal
Columns: 1
Connections: 1/2" BOE
Fixings: N/A included
Available in 30 widths at this height
Finishes and colours
DQ powder coat in-house at their own Norfolk facility, so this range is available across an extensive RAL colour range and DQ's speciality finishes. If you cannot see the colour you want, get in touch and we will price it for you.
Made to order
This radiator is built for you at DQ's Norfolk works, so allow 4-6 weeks from order to delivery. It is not a stocked item and cannot be supplied faster. If you are working to a deadline, talk to us before ordering and we will confirm the current lead time with the factory.
Guarantee
Covered by a 10-year DQ manufacturer guarantee. DQ have been building heating products in Britain for over 25 years and are family owned and run.
Why buy from British Bathroom Company?
Free UK delivery on orders over £100
Genuine DQ Heating product, made in Norfolk
Real bathroom and heating specialists on the end of the phone
Family-run business, same as DQ
Contact us for advice, a bespoke finish or a trade quote.
Code:
DELIVERY
We aim to deliver all orders within 3-7 working days, dependant on the size of your order or item(s)
Express delivery is available on some items, feel free to contact ourselves to check if your desired product is available for express delivery
Small parcels will be delivered via DX and tracking is provided once dispatched
Large items are delivered via Stop Start or Palletways, details of delivery are provided via email and tracking is also available. Please note most large deliveries are KERB SIDE ONLYalthough some companies will aim to get the goods as close to the door as possible.
Returns are accepted within 28 days of receipt of your goods, however, you must request your return within the first 14 days. You can activate a return request in your account, for more details please visit the "Delivery & Returns" page
Christmas Period Any orders placed from 15th December 2025 maybe delayed until the week commencing 5th January 2026. If you need your order sooner, please contact us before purchase to see when your delivery can take place.
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