Castrads one pipe steam radiator with TRV controls in Brooklyn New York

bespoke steam radiator with automatic temperature controls in Park Slope Brooklyn

Close-up of a Mercury cast iron radiator on feet in Farrow & Ball Lime White No. 1 with a polished brass Windsor angled valve on a sisal floor.

Close-up of a plain Mercury 3 Column cast iron radiator in Farrow & Ball Lime White No. 1 with a polished brass Windsor valve on an olive wall.

Mercury 3 Column 860mm cast iron radiator in Farrow & Ball Lime White No. 1 on feet with a brass angled valve, beside a stained-glass front door.

Plain Mercury 3 column cast iron radiator in Lime White on feet, brass valves, in a hallway with olive walls, sisal carpet and stained glass door.

Close view of a Mercury 3 Column cast iron radiator in Farrow & Ball Lime White with a polished brass angled valve, on an olive green wall.

cast iron steam radiator in bespoke beaten brass finish

Plain Mercury 3 column cast iron radiator on feet in Lime White with a brass Windsor valve, below a dado rail on an olive wall by stained glass.

Mercury 3 Column 860mm cast iron radiator in Midnight Ink with brass valves, on feet against a speckled wall beside a wicker sofa.

Plain Mercury 3 Column cast iron radiator in Matt Black on feet against exposed brick, with brass valves, beside a leather barber's chair.

Hallway view of a Mercury 3 column 860mm in Farrow and Ball Lime White with Windsor angled TRV

Close-up of a Mercury 3 Column cast iron radiator in Matt Black against exposed brick, with a brass wall stay and brass angled valve.

Plain Mercury 3 Column cast iron radiator on feet in Lime White with a brass angled valve, below an olive dado wall beside a stained-glass door.

Plain Mercury 3 Column cast iron radiator in Midnight Ink on feet, with brass valves, against a speckled wall beside a wicker sofa.

Close-up of a plain Mercury cast iron radiator in Farrow & Ball Lime White No. 1 with a polished brass Windsor angled thermostatic valve, against an olive wall.

Mercury 3 Column cast iron radiator in Farrow & Ball Lime White No. 1 with a polished brass Windsor valve, against an olive green wall below a dado rail.

Cast iron radiator in Farrow and Ball paint with unlacquered brass TRV valves

Plain Mercury 3 column cast iron radiator on feet in Lime White with a brass angled valve and stays, against an olive wall in a hallway.

Plain three-column Mercury radiator in Lime White on feet, with a brass Windsor valve, in a hallway with green walls and a stained glass door.

Mercury 3 Column 860mm cast iron radiator in Lime White with brass stays and Windsor valve, in an olive hallway by a stained glass door.

Close view of a plain Mercury cast iron radiator on feet in Farrow & Ball Lime White No. 1, with a brass Windsor angled valve, on sisal carpet.

Mercury 3 Column 860mm cast iron radiator in Matt Black on feet against exposed brick, with brass valves, beside a vintage barber's chair.

A plain six-section Mercury cast iron radiator in Beaten Brass on feet, with brass valves, against white panelled walls above a parquet floor.

Technical drawing: Mercury 3 Column 860mm cast iron radiator

Mercury 3 Column 860mm - 10 Section Battery Technical Drawing - SVG

Mercury 3 Column 860mm - Single Section Technical Drawing - SVG

Redecker double stem radiator brush 510502 with Castrads Mercury cast iron radiator in Farrow & Ball Lime White

Redecker single stem radiator brush 511093 with Castrads Mercury cast iron radiator in Farrow & Ball Lime White

Mercury 3 Column 860mm

Name: Mercury 3 Column 860mm
SKU: CI-M3C-860

Made to order

Every radiator is built to the size your room needs. Choose sections, finish and valves in the builder, or let the finder suggest a model for your space.

Build your radiator Find a radiator to fit

Mercury represents the new global standard in cast iron radiators, with curves that fall gracefully into the shadows and lines as crisp and straight as a die. Mercury 3 Column 860mm is perfect in taller rooms, keeping the look of the radiator in proportion to the height of the ceiling.

CI-M3C-860

Available sizes

Outputs in watts per radiator, at the stated temperature difference.

Length, heat output and delivery for each available section count
SKU	Sections	Length (mm)	ΔT50 (W)	ΔT30 (W)	Delivered in	Signature	Branded Paints	Bare Metal
CI-M3C-860-03	3	205	262	135	One piece	—	—	—
CI-M3C-860-04	4	263	349	180	One piece	—	—	—
CI-M3C-860-05	5	322	437	225	One piece	—	—	—
CI-M3C-860-06	6	380	524	269	One piece	—	—	—
CI-M3C-860-07	7	438	611	314	One piece	—	—	—
CI-M3C-860-08	8	496	699	359	One piece	—	—	—
CI-M3C-860-09	9	555	786	404	One piece	—	—	—
CI-M3C-860-10	10	613	873	449	One piece	—	—	—
CI-M3C-860-11	11	671	961	494	One piece	—	—	—
CI-M3C-860-12	12	730	1048	539	One piece	—	—	—
CI-M3C-860-13	13	788	1135	584	One piece	—	—	—
CI-M3C-860-14	14	846	1223	629	One piece	—	—	—
CI-M3C-860-15	15	905	1310	674	One piece	—	—	—
CI-M3C-860-16	16	963	1397	719	One piece	—	—	—
CI-M3C-860-17	17	1021	1485	764	2 pieces	—	—	—
CI-M3C-860-18	18	1079	1572	808	2 pieces	—	—	—
CI-M3C-860-19	19	1138	1660	853	2 pieces	—	—	—
CI-M3C-860-20	20	1196	1747	898	2 pieces	—	—	—
CI-M3C-860-21	21	1254	1834	943	2 pieces	—	—	—
CI-M3C-860-22	22	1313	1922	988	2 pieces	—	—	—
CI-M3C-860-23	23	1371	2009	1033	2 pieces	—	—	—
CI-M3C-860-24	24	1429	2096	1078	2 pieces	—	—	—
CI-M3C-860-25	25	1488	2184	1123	2 pieces	—	—	—
CI-M3C-860-26	26	1546	2271	1168	2 pieces	—	—	—
CI-M3C-860-27	27	1604	2358	1213	2 pieces	—	—	—
CI-M3C-860-28	28	1662	2446	1258	2 pieces	—	—	—
CI-M3C-860-29	29	1721	2533	1302	2 pieces	—	—	—
CI-M3C-860-30	30	1779	2620	1347	2 pieces	—	—	—
CI-M3C-860-31	31	1837	2708	1392	2 pieces	—	—	—
CI-M3C-860-32	32	1896	2795	1437	2 pieces	—	—	—
CI-M3C-860-33	33	1954	2882	1482	3 pieces	—	—	—
CI-M3C-860-34	34	2012	2970	1527	3 pieces	—	—	—
CI-M3C-860-35	35	2071	3057	1572	3 pieces	—	—	—
CI-M3C-860-36	36	2129	3144	1617	3 pieces	—	—	—
CI-M3C-860-37	37	2187	3232	1662	3 pieces	—	—	—
CI-M3C-860-38	38	2245	3319	1707	3 pieces	—	—	—
CI-M3C-860-39	39	2304	3406	1752	3 pieces	—	—	—
CI-M3C-860-40	40	2362	3494	1797	3 pieces	—	—	—

Branded Paints: Little Greene, Farrow & Ball, Paint & Paper Library, Mylands

Heat output

Output varies with flow temperature. The curve shows watts per section across the usual range of ΔT.

Heat output in watts per section at each temperature difference
ΔT (K)	Output per section (W)
ΔT15	18.2
ΔT20	26.5
ΔT25	35.4
ΔT30	44.9
ΔT35	54.9
ΔT40	65.3
ΔT45	76.1
ΔT50	87.3

Specifications

Dimensions, weights and heat outputs for this model
Ref	Attribute	Value
A	Height with legs	860mm
B	Pipe centre to floor	102.1mm
C	Max section depth	101mm
D	Interaxis distance	723mm
E	Height without legs	798mm
F	Mid section depth	101mm
G	Pipe centre to wall (Atlas bracket)	63mm
L	Section length	58.3mm
–	Internal volume per section	0.73L
–	Leg section weight	5.9kg
–	Mid section weight	5.4kg
–	Max single-piece delivery size	16sections
–	Output at ΔT30	44.9W
–	Output at ΔT50	87.3W

φ = K_m × ΔTⁿ · K_m = 0.536 · n = 1.302
Tested to EN 442 · BSRIA · Test ref: 61431
Declaration of Performance: 202009-1100 · CE marked