460mm 223mm Rathmell 4 Column Cast iron radiators from our Rathmell 4 Column range. Set room size / BTU Calculator Heat Output (BTU) Calculator Use this calculator to determine the required heat output to heat your room. A BTU (British Thermal Unit) is a unit of measurement of heat per hour. The BTU calculator will determine the size and quantitry of radiators needed per room. Room Type Dining Room Lounge Bathroom Bedroom Kitchen Room Dimension Metres Feet Width Length Height Extras Is your room North facing? Does your room have French windows? Does your room have double glazing? BTU's Required: Only show options wih required heat output Size / Finish Valves Pipe Shrouds Wall Stays Bleed Nipples Height 460mm 665mm 810mm Width 223mm 3 sections, 603 BTUs/177 Watts (ΔT 50°) 286mm 4 sections, 804 BTUs/236 Watts (ΔT 50°) 349mm 5 sections, 1005 BTUs/295 Watts (ΔT 50°) 412mm 6 sections, 1206 BTUs/354 Watts (ΔT 50°) 475mm 7 sections, 1407 BTUs/413 Watts (ΔT 50°) 538mm 8 sections, 1608 BTUs/472 Watts (ΔT 50°) 601mm 9 sections, 1809 BTUs/531 Watts (ΔT 50°) 664mm 10 sections, 2010 BTUs/590 Watts (ΔT 50°) 727mm 11 sections, 2211 BTUs/649 Watts (ΔT 50°) 790mm 12 sections, 2412 BTUs/708 Watts (ΔT 50°) 853mm 13 sections, 2613 BTUs/767 Watts (ΔT 50°) 916mm 14 sections, 2814 BTUs/826 Watts (ΔT 50°) 979mm 15 sections, 3015 BTUs/885 Watts (ΔT 50°) 1042mm 16 sections, 3216 BTUs/944 Watts (ΔT 50°) 1105mm 17 sections, 3417 BTUs/1003 Watts (ΔT 50°) 1168mm 18 sections, 3618 BTUs/1062 Watts (ΔT 50°) 1231mm 19 sections, 3819 BTUs/1121 Watts (ΔT 50°) 1294mm 20 sections, 4020 BTUs/1180 Watts (ΔT 50°) 1357mm 21 sections, 4221 BTUs/1239 Watts (ΔT 50°) 1420mm 22 sections, 4422 BTUs/1298 Watts (ΔT 50°) 1483mm 23 sections, 4623 BTUs/1357 Watts (ΔT 50°) 1546mm 24 sections, 4824 BTUs/1416 Watts (ΔT 50°) 1609mm 25 sections, 5025 BTUs/1475 Watts (ΔT 50°) 1672mm 26 sections, 5226 BTUs/1534 Watts (ΔT 50°) 1735mm 27 sections, 5427 BTUs/1593 Watts (ΔT 50°) 1798mm 28 sections, 5628 BTUs/1652 Watts (ΔT 50°) 1861mm 29 sections, 5829 BTUs/1711 Watts (ΔT 50°) 1924mm 30 sections, 6030 BTUs/1770 Watts (ΔT 50°) Radiator Assembly Tool Your radiator will be delivered in multiple parts & require assembly on site. A radiator assembly tool can be hired from Renaissance at Home and can be returned for a full refund (less postage costs). None Cast Iron Radiator Assembly Tool For 1 & 1/2 Inch Connectors £89.50 Colour / Finish All Renaissance Specialist Primer Renaissance Ancient Breeze Renaissance Buttermilk Renaissance Foundry Grey Renaissance French Grey Renaissance Graphite Grey Renaissance Hammered Bronze Renaissance Hammered Gold Renaissance Parchment White Renaissance Satin Black Renaissance Vellum Renaissance Willow Green Renaissance Hand Burnished Specialist Antiqued French Grey Specialist Highlight Polish Specialist Satin Polished Specialist Vintage Copper Specialist Custom Colour Please enter the brand name and colour name. Some examples are shown below: Farrow & Ball - Elephants BreathRAL 1003Pantone 266 Custom Colour Manual Radiator Valves A manual radiator valve remains either on or off. Manual valves need to be physically rotated by hand to increase or decrease the amount of hot water flowing into your radiator. None £0 Brumpton 15mm Inlet Manual Valve (Chrome) £39.95 Crocus Wheel 15mm Inlet Manual Valve (Antique Brass) £39.95 Crocus Wheel 15mm Inlet Manual Valve (Black Nickel) £39.95 Crocus Wheel 15mm Inlet Manual Valve (Chrome) £63.00 Crocus Wheel 15mm Inlet Manual Valve (Satin Nickel) £63.00 Telford 15mm Inlet Manual Valve (Chrome) £39.95 Throttle 15mm Inlet Manual Valve (Chrome) £39.95 Thermostatic Radiator Valves A thermostatic radiator valve or TRV is self-regulating, and controls the temperature of the radiator by changing the amount, or flow, of hot water into your radiator. None £0 Crocus Wheel 15mm Inlet TRV (Antique Brass), Lacquered £70.00 Crocus Wheel 15mm Inlet Thermostatic Valve (Satin Nickel) £70.00 Crocus Wheel 15mm Inlet Thermostatic Valve (Black Nickel) £39.95 Crocus Wheel 15mm Inlet Thermostatic Valve (Chrome) £70.00 Kingsgrove 15mm Inlet Corner Thermostatic Valve (Pewter) £75.00 Kingsgrove 15mm Inlet Corner Thermostatic Valve (Satin Nickel) £75.00 Kingsgrove 15mm Inlet Corner Thermostatic Valve (Chrome) £75.00 Kingsgrove 15mm Inlet Lacquered Corner Thermostatic Valve (Brass) £75.00 Kingsgrove 15mm Inlet Lacquered Corner Thermostatic Valve (Brushed Brass) £75.00 Kingsgrove 15mm Inlet Lacquered Corner Thermostatic Valve (Antique Brass) £75.00 Kingsgrove 15mm Inlet Thermostatic Valve (Pewter) £75.00 Kingsgrove 15mm Inlet Lacquered Thermostatic Valve (Brushed Brass) £75.00 Kingsgrove 15mm Inlet Lacquered Thermostatic Valve (Antique Brass) £75.00 Kingsgrove 15mm Inlet Thermostatic Valve (Satin Nickel) £75.00 Kingsgrove 15mm Inlet Thermostatic Valve (Brass) £75.00 Kingsgrove 15mm Inlet Thermostatic Valve With Wooden Top (Chrome) £75.00 Kingsgrove 15mm Inlet Thermostatic Valve (Chrome) £39.95 Pipe Shrouds Pipe shrouds are used to cover the regular copper pipework of your heating system and to complement your radiator and valves. None £0 Pewter Pipe Shroud £15.00 Brushed Brass Pipe Shroud Lacquered £15.00 Satin Nickel Pipe Shroud £15.00 Brass Pipe Shroud £15.00 Chrome Pipe Shroud £15.00 Antique Brass Pipe Shroud Lacquered £15.00 Wall Stays Most cast iron radiators require at least one wall stay to safely hold it to the wall. Radiators over 10 sections require at least 2 wall stays. None £0 Galvanised Hexagon Plate Wall Stay £10.50 Galvanised Square Plate Wall Stay £10.50 Bleed Nipples None £0 Satin Nickel Bleed Nipple £1.10 Brass Bleed Nipple £1.10 Luxury Copper Air Bleed Valve £6.50 Luxury Chrome Air Bleed Valve £6.50 Luxury Polished Nickel Air Bleed Valve £6.50 Luxury Brass Air Bleed Valve £6.50 Total £100 (inc VAT) Back Next