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North DevonHeating Engineers

Central Heating in North Devon

Central heating across North Devon covers a wide spread of system ages and types, shaped by a housing stock that ranges from Victorian terraces in central Barnstaple to newer estates in Fremington and Roundswell, farmhouses scattered around South Molton, and holiday cottages along the coast. A modern gas or oil-fired system with a well-maintained network of radiators is straightforward to keep running efficiently; an older system with a mix of original and replaced radiators, added extensions, and years of sludge build-up is a different job entirely. Most of the 86 heating and plumbing businesses in this directory cover central heating installation and repair as part of their core work, from full system installs in new extensions to smaller jobs like adding a radiator, fixing cold spots, or fitting modern thermostatic controls to an older system. If your central heating feels inefficient, uneven, or noisy, the underlying cause is often fixable without a full system replacement — the sections below cover the most common issues and what a typical fix involves.

Barnstaple

All in Barnstaple

Bideford

All in Bideford

Ilfracombe

All in Ilfracombe

Braunton

All in Braunton

South Molton

All in South Molton

Great Torrington

All in Great Torrington

Fremington

All in Fremington

Northam & Appledore

All in Northam & Appledore

Woolacombe & Croyde

All in Woolacombe & Croyde

Combe Martin

All in Combe Martin

System types you'll find in North Devon homes

A 'wet' central heating system — radiators fed by pipework from a boiler — is standard across almost all North Devon properties, whether the boiler itself runs on mains gas, oil or LPG. Within that, the main variation is between an open-vented system (with a header tank, usually in the loft, common in older properties that haven't been upgraded) and a sealed system (pressurised, with an expansion vessel, standard in most newer installations and combi boiler setups).

Underfloor heating is becoming more common in newer builds and extensions, particularly around Barnstaple and Bideford's newer developments, and pairs well with heat pumps because it runs efficiently at lower water temperatures than radiators. Older properties retrofitting underfloor heating into an existing extension need it designed carefully alongside the rest of the system to avoid one part of the house heating unevenly compared with the rest — a common complaint in extended farmhouses and cottages where a new room has been added onto an older heating loop without adjusting the balance.

Power flushing and fixing cold spots

Cold spots at the top or bottom of radiators are one of the most common central heating complaints, and are usually caused by trapped air (top of the radiator — fixed by bleeding) or sludge and debris settling at the bottom (needing a power flush to properly clear). A build-up of black sludge, made up of rust and mineral deposits circulating in the system, is more common in older properties with original radiators and pipework that have never been flushed, and gets worse over years without a corrosion inhibitor in the system.

A power flush uses a pump to force a cleaning fluid at high velocity through the whole system, clearing blockages that a simple bleed won't touch, and typically takes most of a day for a full house. It's worth doing before fitting a new boiler onto an old radiator network, since sludge from the old pipework can otherwise damage a brand-new boiler's heat exchanger within its first few years — a false economy if skipped to save the flush cost. Typical UK range for a power flush is £300–£600 depending on the number of radiators.

Extending heating into older extensions and outbuildings

Adding a new room, converting a garage, or heating a converted barn or outbuilding is common across North Devon's rural properties, and it raises a genuine design question rather than simply running a pipe and fitting a radiator: is the existing boiler big enough to cope with the extra load, and can the new space be balanced against the rest of the system without robbing heat from existing rooms?

A competent installer will calculate the heat loss of the new space — accounting for insulation standard, window size and exposure — before recommending radiator sizes or, in some cases, an additional zone with its own thermostat so the new space can be heated independently of the main house. This is particularly relevant for holiday let conversions and granny annexes, increasingly common around the coast and in larger rural properties, where separate heating control for a self-contained space is often more practical than tying it into the main system entirely.

Central Heating: common questions

Why are some of my radiators cold at the top but warm at the bottom?
This is almost always trapped air, and it's simple to fix yourself: use a radiator key to slowly open the bleed valve at the top corner until water (not air) starts to hiss out, then close it. If the same radiators need bleeding repeatedly, there may be a bigger issue, such as a faulty automatic air vent, worth mentioning to an engineer.
What's the difference between bleeding a radiator and power flushing a system?
Bleeding releases trapped air from a single radiator and takes minutes. Power flushing is a whole-system clean using a pump to force cleaning fluid through all the pipework and radiators, clearing sludge and debris that bleeding can't touch. If cold spots persist at the bottom of radiators after bleeding, sludge rather than air is usually the cause, and a flush is the fix.
Can I add a radiator to an existing central heating system?
Usually yes, though it's worth having an engineer check the boiler's output and the system's balance first, particularly in an older property or one that's already had extensions added over the years. Adding a radiator without checking capacity can leave other rooms undersupplied with heat, especially at the far end of a long pipe run.
How much does a full central heating system installation cost?
Typical UK range for a full central heating installation — boiler, radiators and pipework in a property with none currently, or a full replacement — is roughly £3,000–£7,000, depending on the size of the property and number of radiators. Smaller jobs, like adding radiators to an extension or upgrading controls, cost considerably less; get a written quote after a proper survey.

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