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The DQ Martha Horizontal Radiator 560mm - RAL Colour / DQ Finish is proof that a radiator can be part of the design rather than something you plan around.
Widths and heat output
This radiator is 560mm tall and comes in 34 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
560 x 569mm
2,245 BTU
658 W
17m²
CR/MAR/560/7-F
560 x 646mm
2,565 BTU
752 W
19m²
CR/MAR/560/8-F
560 x 723mm
2,886 BTU
846 W
21m²
CR/MAR/560/9-F
560 x 800mm
3,207 BTU
940 W
24m²
CR/MAR/560/10-F
560 x 877mm
3,528 BTU
1,034 W
26m²
CR/MAR/560/11-F
560 x 954mm
3,848 BTU
1,128 W
29m²
CR/MAR/560/12-F
560 x 1031mm
4,169 BTU
1,222 W
31m²
CR/MAR/560/13-F
560 x 1108mm
4,490 BTU
1,316 W
33m²
CR/MAR/560/14-F
560 x 1185mm
4,811 BTU
1,410 W
36m²
CR/MAR/560/15-F
560 x 1262mm
5,131 BTU
1,504 W
38m²
CR/MAR/560/16-F
560 x 1339mm
5,452 BTU
1,598 W
40m²
CR/MAR/560/17-F
560 x 1416mm
5,773 BTU
1,692 W
43m²
CR/MAR/560/18-F
560 x 1493mm
6,094 BTU
1,786 W
45m²
CR/MAR/560/19-F
560 x 1570mm
6,414 BTU
1,880 W
48m²
CR/MAR/560/20-F
560 x 1647mm
6,735 BTU
1,974 W
50m²
CR/MAR/560/21-F
560 x 1724mm
7,056 BTU
2,068 W
52m²
CR/MAR/560/22-F
560 x 1801mm
7,377 BTU
2,162 W
55m²
CR/MAR/560/23-F
560 x 1878mm
7,697 BTU
2,256 W
57m²
CR/MAR/560/24-F
560 x 1955mm
8,018 BTU
2,350 W
59m²
CR/MAR/560/25-F
560 x 2032mm
8,339 BTU
2,444 W
62m²
CR/MAR/560/26-F
560 x 2109mm
8,660 BTU
2,538 W
64m²
CR/MAR/560/27-F
560 x 2186mm
8,980 BTU
2,632 W
67m²
CR/MAR/560/28-F
560 x 2263mm
9,301 BTU
2,726 W
69m²
CR/MAR/560/29-F
560 x 2340mm
9,622 BTU
2,820 W
71m²
CR/MAR/560/30-F
560 x 2417mm
9,942 BTU
2,914 W
74m²
CR/MAR/560/31-F
560 x 2494mm
10,263 BTU
3,008 W
76m²
CR/MAR/560/32-F
560 x 2571mm
10,584 BTU
3,102 W
78m²
CR/MAR/560/33-F
560 x 2648mm
10,905 BTU
3,196 W
81m²
CR/MAR/560/34-F
560 x 2725mm
11,225 BTU
3,290 W
83m²
CR/MAR/560/35-F
560 x 2802mm
11,546 BTU
3,384 W
86m²
CR/MAR/560/36-F
560 x 2879mm
11,867 BTU
3,478 W
88m²
CR/MAR/560/37-F
560 x 2956mm
12,188 BTU
3,572 W
90m²
CR/MAR/560/38-F
560 x 3033mm
12,508 BTU
3,666 W
93m²
CR/MAR/560/39-F
560 x 3110mm
12,829 BTU
3,760 W
95m²
CR/MAR/560/40-F
Specification
Range: Martha
Height: 560mm
Finish: RAL Colour / DQ Finish
Material: Cast Iron
Orientation: Horizontal
Columns: 7
Connections: 1/2" BOE
Fixings: N/A included
Available in 34 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 3-4 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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