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Quick BTU calculator

Enter your room measurements for an estimated heating requirement. Compare radiators without leaving this page.

Starting assumptions: two adjacent outside walls, 1.5m² low-E glazing, insulated cavity walls, ground floor and insulated loft. Check these against your room.

Check or change room assumptions

U-values describe heat passing through a surface; use known building values where available. −3°C outdoors, 10°C below and the default U-values are preliminary assumptions, not a location survey. Unheated lofts use the outdoor temperature; heated floors/ceilings use U 1.36/1.62 and the adjacent-room temperature.

Preliminary rectangular-room estimate, not an installer’s heat-loss survey. It excludes detailed thermal bridging, ground/loft modelling and ventilation-system design. Confirm the room heat loss and radiator output at your heating-system temperatures before ordering.

Need help choosing? Contact us →

Accessories

Find valves, heating elements, fittings and bathroom accessories for your installation. Start with the component you need, then check its dimensions and compatibility.

Prices include VAT1-year accessory warranty


blck-ang-15
blck-str-15
caps
CR-100MM-TIMER-BATHROOM-EXTRACTOR-FAN
CR-150MM-BLACK-HUMIDISTAT-EXTRACTOR-FAN
CR-15MM-TO-10MM-VALVE-REDUCERS
CR-15MM-TO-8MM-VALVE-REDUCERS
CR-BLACK-ANGLED-MANUAL-VALVE-PAIR
CR-BLACK-DIGITAL-DUAL-FUEL-ELEMENT-VALVE-KIT
CR-BLACK-DIGITAL-PROGRAMMABLE-TOWEL-RAIL-ELEMENT
CR-BLACK-STRAIGHT-MANUAL-VALVE-PAIR
CR-BLACK-TOWEL-RAIL-BRACKET-KIT
CR-CHROME-ANGLED-MANUAL-VALVE-PAIR
CR-CHROME-STRAIGHT-MANUAL-VALVE-PAIR
CR-CHROME-TOWEL-RAIL-BRACKET-KIT
CR-CHROME-TOWEL-RAIL-TOP-FITTING-KIT
CR-DUAL-FUEL-T-PIECE-CONNECTOR
CR-FIXED-TEMPERATURE-TOWEL-RAIL-ELEMENTS
CR-HALF-INCH-TOWEL-RAIL-SEALING-PLUG
CR-HEATING-ELEMENT-T-PIECE-BLANKING-KIT
CR-RADIATOR-AIR-VENT-AND-BLANKING-SET
CR-RADIATOR-CHEMICAL-DOSING-FUNNEL
CR-RADIATOR-PIPE-SLEEVES-WALL-COLLARS
CR-ROUND-THERMOSTAT-BOOST-TOWEL-RAIL-ELEMENT
CR-ROUND-THERMOSTAT-DUAL-FUEL-KIT
CR-TOWEL-RAIL-BLEED-PLUG-COVER-CAPS-PAIR
CR-WHITE-TOWEL-RAIL-BRACKET-KIT
KTX-3
MOA-CHROME
MOA-DUAL-FUEL
REG 3-CHROME
Standard-Element
STNDR-DUAL
Price ▼

24 products on this page · Browse more using the page links below

100mm bathroom extractor fan with humidity sensor and timer 100mm bathroom extractor fan with humidity sensor and timer

100 mm duct · Humidity sensor and timer · Black or white

Replacing a fan on a 100 mm duct? Choose a black or white fascia and use the run-on timer to keep extracting after the fan is switched off at its trigger.Product details100mm / 4-inch duct connectionBuilt-in humidity sensor and run-on timerIP44 ratingWall or ceiling mounting subject to the installation requirementsCheck before orderingAsk a qualif..
£29.99
Ex Tax:£24.99
Question
150mm Matt Black Bathroom Extractor Fan with Humidistat & Timer (255m³/h) 150mm Matt Black Bathroom Extractor Fan with Humidistat & Timer (255m³/h)

150 mm duct · Humidity sensor and timer · Black

The WW-150QTH fits a 150 mm duct and has a matt black fascia. Its humidistat responds to moisture and its adjustable timer provides 1–30 minutes of run-on. The listed airflow is 255 m³/h. Ask your installer to check what the fan can deliver through your duct route.Product detailsModel WW-150QTHListed airflow: 255m³/h150mm / 6-inch duct sizeHumidity sensor and 1–30 minute run-on timerListed motor power: 21W; noise level: 35dBIPX4 sp..
£41.99
Ex Tax:£34.99
Question
Black angled radiator valves — pair Black angled radiator valves — pair
Finish your towel rail connection with a matching pair of black angled manual valves. Choose the option that matches your heating pipe diameter.Product detailsBlack finish with a brass bodyAngled connection arrangementSupplied as a pair8mm and 10mm options include the corresponding reduction fitting..
£20.39
Ex Tax:£16.99
Question
Black digital dual-fuel kit with angled valve Black digital dual-fuel kit with angled valve
Add programmable electric heating to a compatible plumbed towel rail with this black dual-fuel kit. Choose a 300W or 500W element.Product detailsDigital thermostat with 30–70°C adjustment in Free ModeWeekly programming and control lockTimed heating from 30 minutes to 8 hours½-inch BSP element connec..
£83.99
Ex Tax:£69.99
Question
Black programmable towel rail heating element Black programmable towel rail heating element
Heat a compatible towel rail independently with this black digital element. Select the power rating and use its programmable controls to set heating periods.Product details300W or 500W optionsDigital touch controlsWeekly scheduling and boost functionChild-lock and frost-protection functionsG ½-inch ..
£65.99
Ex Tax:£54.99
Question
Black straight radiator valves — pair
Finish your towel rail connection with a matching pair of black straight manual valves. Choose the option that matches your heating pipe diameter.Product detailsBlack finish with a brass bodyStraight connection arrangementSupplied as a pair8mm and 10mm options include the corresponding reduction fit..
£20.39
Ex Tax:£16.99
Question
Chrome towel rail vent, plug and cover-cap kit
Refresh compatible towel rail top fittings with a coordinated chrome kit combining the air vent, blanking plug and decorative covers.Product detailsChrome finishIncludes air-vent and blanking componentsMatching decorative caps suppliedCheck before orderingCheck the radiator thread and cover-cap dime..
£8.39
Ex Tax:£6.99
Question
Fixed-temperature towel rail element — 200W to 600W Fixed-temperature towel rail element — 200W to 600W
Choose a simple fixed-temperature element for a compatible towel radiator. The 200W, 400W and 600W versions offer different power ratings for the specified rail.Product detailsFixed operating temperature listed as 70°CG ½-inch BSP connectionIP55 rating200W rod: approximately 370mm; 400W and 600W: ap..
£23.99
Ex Tax:£19.99
Question
Radiator air-vent and blanking-plug set Radiator air-vent and blanking-plug set
Complete the top connections of a compatible towel rail with an air vent and blanking plug. Choose matt black or nickel to match the installation.Product details½-inch BSP threadsOne air vent and one blanking plugChoice of matt black or nickel finishCheck before orderingConfirm the thread and sealin..
£5.99
Ex Tax:£4.99
Question
Radiator pipe sleeves and wall collars — twin set Radiator pipe sleeves and wall collars — twin set
Tidy visible radiator pipework with two decorative sleeves and matching wall collars. Choose black or chrome for a coordinated finish.Product detailsTwo sleeves, each 200mm longTwo wall collars, each 55mm acrossBlack or chrome finishCheck before orderingConfirm the sleeve bore suits your pipe diamet..
£7.19
Ex Tax:£5.99
Question
Radiator treatment funnel and dosing adapter Radiator treatment funnel and dosing adapter
Add a suitable heating-system treatment through a compatible radiator connection using this dosing funnel and adapter.Product detailsFor adding compatible central-heating treatmentsFunnel and connection adapterUseful during heating-system maintenanceCheck before orderingConfirm the adapter fits the ..
£15.59
Ex Tax:£12.99
Question
Round thermostat dual-fuel kit with angled valve
Combine central heating with independently controlled electric towel warming using this coordinated dual-fuel kit for compatible rails.Product detailsChoice of black or chrome and 300W or 500W45–65°C thermostat adjustment in 5°C steps1–5 hour boost at 65°C with automatic switch-off½-inch BSP element..
£71.99
Ex Tax:£59.99
Question
Round thermostatic towel rail element with boost timer Round thermostatic towel rail element with boost timer
Set the towel rail temperature or run a timed boost with this round-controller element. Choose a black or chrome finish and 300W or 500W power.Product detailsTemperature settings from 45°C to 65°C in 5°C steps1–5 hour boost at 65°C with automatic switch-off½-inch BSP connection300W rod: approximatel..
£44.39
Ex Tax:£36.99
Question
Towel rail dual-fuel connector — ½-inch BSP Towel rail dual-fuel connector — ½-inch BSP
Create an additional connection for a compatible heating element and radiator valve with this dual-fuel T-piece. Choose a finish to suit your towel rail.Product details½-inch BSP connection arrangementBlack, white and chrome choicesFor compatible dual-fuel towel rail installationsCheck before orderi..
£10.79
Ex Tax:£8.99
Question
Towel rail element kit with T-piece and sealing plug Towel rail element kit with T-piece and sealing plug
Pair the selected 200W, 400W or 600W element with a coordinating T-piece and blanking plug for a compatible towel rail installation.Product detailsType 8801 element with ½-inch BSP connection200W rod: 300mm; 400W: 470mm; 600W: 630mm230V supply; approximately 1.2m cable; IP55 ratingChoose chrome or m..
£35.99
Ex Tax:£29.99
Question
½-inch BSP radiator sealing plug — black or chrome ½-inch BSP radiator sealing plug — black or chrome
Seal an unused compatible radiator connection with this single ½-inch BSP plug. Select black or chrome to coordinate with the towel rail.Product details½-inch BSP threadBlack or chrome finishFor an unused compatible radiator connectionCheck before orderingConfirm the radiator thread and required sea..
£5.99
Ex Tax:£4.99
Question
Black towel rail wall-mounting bracket kit
Replace missing or worn towel rail supports with this black wall-mounting kit for compatible flat or curved ladder rails.Product detailsBlack finishFour-bracket setSuitable for compatible flat and curved ladder towel railsCheck before orderingCompare the bracket dimensions and rail spacing with your..
£10.79
Ex Tax:£8.99
Question
Chrome Cover Caps For Bleeding & Blanking Plug
A chrome decorative cover cap for a compatible towel rail fitting.Product detailsFinishChromePack quantity1 capDecorative cover for a compatible air-vent or blanking fittingCheck before orderingA cover cap does not replace the sealing air vent or blanking plug. Check the shape and dimensions of the ..
£2.29
Ex Tax:£1.91
Question
Chrome straight radiator valves — pair Chrome straight radiator valves — pair
Finish your towel rail connection with a matching pair of chrome straight manual valves. Choose the option that matches your heating pipe diameter.Product detailsChrome finish with a brass bodyStraight connection arrangementSupplied as a pair8mm and 10mm options include the corresponding reduction f..
£17.99
Ex Tax:£14.99
Question
Chrome towel rail wall-mounting bracket kit Chrome towel rail wall-mounting bracket kit
Replace missing or worn towel rail supports with this chrome wall-mounting kit for compatible flat or curved ladder rails.Product detailsChrome finishFour-bracket setSuitable for compatible flat and curved ladder towel railsCheck before orderingCompare the bracket dimensions and rail spacing with yo..
£10.79
Ex Tax:£8.99
Question
Radiator valve adapters — 15mm to 10mm, pair
Connect compatible 15mm compression radiator valves to 10mm microbore pipe with this pair of reducing adapters.Product detailsReduces a compatible 15mm valve inlet to 10mm pipePair for the two radiator valve connectionsFor compatible central-heating valve installationsCheck before orderingCheck the ..
£4.79
Ex Tax:£3.99
Question
Radiator valve adapters — 15mm to 8mm, pair
Connect compatible 15mm compression radiator valves to 8mm microbore pipe with this pair of reducing adapters.Product detailsReduces a compatible 15mm valve inlet to 8mm pipePair for the two radiator valve connectionsFor compatible central-heating valve installationsCheck before orderingCheck the va..
£4.79
Ex Tax:£3.99
Question
Towel rail bleed and blanking cover caps — pair Towel rail bleed and blanking cover caps — pair
Give compatible top fittings a coordinated appearance with this pair of decorative cover caps. Select chrome or matt black.Product detailsPair of decorative capsChrome or matt black finishFor compatible towel rail air-vent and blanking fittingsCheck before orderingThese caps cover compatible fitting..
£3.69
Ex Tax:£3.08
Question
White towel rail wall-mounting bracket kit White towel rail wall-mounting bracket kit
Replace missing or worn towel rail supports with this white wall-mounting kit for compatible flat or curved ladder rails.Product detailsWhite finishFour-bracket setSuitable for compatible flat and curved ladder towel railsCheck before orderingCompare the bracket dimensions and rail spacing with your..
£11.99
Ex Tax:£9.99
Question
Showing 1 to 24 of 25 (2 Pages)

Find valves, heating elements, fittings and bathroom accessories for your installation. Start with the component you need, then check its dimensions and compatibility.

Use the valve range for pipe connections, heating elements for compatible electric or dual-fuel arrangements, and individual fittings for maintenance or mounting. Product pages explain pack contents and available options.

Accessories are not universally interchangeable. Confirm connection sizes, wattage and installation requirements before ordering. Accessories, including valves and heating elements, have a 1-year warranty.

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