Mon–Fri 8:00am – 5:00pm
The Three Calls
The same three patterns account for 80% of the central heating jobs we get called out to. The fix is rarely "a new boiler" — it's usually a system problem hiding under boiler-shaped symptoms.
Some rooms freezing, others boiling
Uneven heat usually means the system is unbalanced — incorrect lockshield settings, undersized radiators, or sludge starving the far end of the loop. We diagnose the cause, not the symptom.
Black sludge & cold spots in radiators
Magnetite build-up reduces flow, kills efficiency, and eventually wrecks pumps and heat exchangers. A power flush plus a magnetic filter restores the system to like-new performance.
New extension that the heating can't cope with
Adding rooms without resizing the system means everything underperforms. We recalculate the heat-loss properly and upsize boiler, pump, or pipework where needed.
What We Do
From a single radiator swap to a full house overhaul, we cover every part of the central heating system — and we'll always tell you which one will give you the most for your money.
Anatomy
A healthy central heating system is a chain — and the chain is only as strong as its weakest link. Here's what every part actually does, and why every one of them matters.
Boiler
Heat generation. Sized to your home's actual demand — not the size of the old one.
Pump
Moves water through the system. Modern grade-A pumps run at a fraction of the wattage of old ones.
Expansion vessel
Absorbs pressure changes as water heats and cools. Should be re-pressurised every 2–3 years.
Magnetic filter
Catches sludge before it reaches the boiler. Standard install for us — extends warranty validity.
Radiators
Heat delivery. Sized per-room based on heat loss — not just "looks about right".
TRVs & lockshields
Per-room temperature control and system balancing. The cheapest efficiency upgrade you can make.
Smart thermostat
Schedule, geofencing, holiday mode. Pays for itself within 18 months in most homes.
Zone valves
Separate upstairs / downstairs control on system and regular boilers. Real savings on bedroom-only schedules.
The Unsexy Procedure That Saves Systems
Half the "power flushes" we see were just the system being drained, refilled and inhibitor added. That's not a flush. Here's the real procedure — radiator-by-radiator, pumped, chemical, certified.
Test the system
Magnet test on the return pipe, infrared scan of every radiator, water sample analysis. We confirm the flush is actually needed before quoting.
Connect the rig
High-flow pumped flushing rig with chemical agitator and corrosion inhibitor. Pressurised, not gravity-fed — that's what makes the difference.
Flush radiator-by-radiator
Every rad isolated and flushed individually. Sludge is broken down chemically then pumped out, not just stirred up to settle elsewhere.
Add inhibitor & filter
Fresh corrosion inhibitor, magnetic filter fitted on the return. We hand you a flush certificate that protects warranty claims.
Full System Install
01
Site survey
On-site visit to measure rooms, check existing pipework, age of radiators, boiler position and gas supply. Photos taken, notes made — proper data, not a glance.
02
Heat-loss calc & design
Room-by-room heat-loss calculation. Radiator schedule sized to actual demand. Pipe sizing checked. Written quote with full spec inside 48 hours.
03
Installation
Floors and carpets protected. Old system drained, new components installed cleanly. Most full-house jobs done in 2–4 days depending on scope.
04
Balance & commission
Lockshields set, TRVs configured, smart controls paired. We don't leave until every radiator is hitting its design temperature.
05
Handover
Full walk-through of the system, smart-thermostat setup, all certificates and warranty registration. One-week follow-up to confirm everything is running properly.
Indicative Pricing
Every full-system price depends on the property — but here's where most jobs in South Yorkshire land. We always survey first and quote in writing.
Radiators (labour only)
from £120
Inc. VAT · all certificates
Like-for-like radiator swap from £120 (£80 per extra rad in the same visit). New radiator install from £150 (£100 per extra rad). Labour only — you supply the radiator or we quote one in.
Full power flush
from £495
Inc. VAT · all certificates
Whole-system flush with chemical agitation. New corrosion inhibitor and magnetic filter included. Flush certificate issued.
Full system install
from £4,500
Inc. VAT · all certificates
Complete central heating overhaul: new boiler, pump, rads, TRVs, smart controls, mag filter. Engineered for your home.
Included As Standard
Heat-loss calculation per room
Magnetic system filter as standard
Corrosion inhibitor (BS 7593)
TRVs on every radiator
System balanced & commissioned
Smart thermostat included
Floors & carpets protected
Building regs notification
What Customers Say
"Put my mum at ease"
Well what can I say — absolutely brilliant service. I would highly recommend this company. They came and fitted a new boiler system for my 85-year-old mother-in-law who's agoraphobic. They're extremely lovely lads and really put her at ease — nothing was too much trouble. They arrived when they said they would (which is a bonus nowadays) and kept me informed throughout. It wasn't an easy job but their work was 100% and they left the place nice and tidy afterwards. I honestly can't rate this company high enough — 10/10 lads, thank you for all your hard work.
Alicia Gee
Verified Google Review · New Boiler System Installation
"Completed in a day"
Danny and his team from Eco Heat Surge replaced our faulty system heating boiler and the work was top class. Completed in a day and left everything clean and tidy afterwards. Wouldn't hesitate to recommend this company to anyone.
Margaret
Verified Google Review · System Boiler Replacement
"Rectified — no problem"
Had the lads come to lay a new gas pipe for a kitchen refurb along with relocating the pipework for 2 new radiators. Then recalled them to move the gas pipe slightly as my measurements were off — which they rectified, no problem. Very professional. Would highly recommend.
Lee Matthews
Verified Google Review · Gas Pipework & Radiator Relocation
"Polite and professional"
Brilliant service by Danny and Adam. So polite and professional! Highly recommended.
Deborah McShane
Verified Google Review · Heating Service
"Definitely recommend"
Eco Heat Surge team — fantastic. Thank you. Definitely the team for the job. So pleased with the work. Definitely recommend.
Shirley Boucher
Verified Google Review · Heating Work
Common Questions
Yes. We design and fit complete central heating systems across Barnsley and South Yorkshire, from the boiler and radiators to the pipework and controls. Whether it is a first-time system, a full replacement, or extending heating into an extension or loft conversion, we size it properly at survey so every room heats evenly.
A full central heating overhaul starts from £4,500. That includes a new boiler, pump, radiators, TRVs, smart controls and a magnetic filter, all sized to your home. The exact figure depends on the property, so we survey and quote in writing first.
A power flush pushes a cleaning solution through your system at high flow to clear out the black sludge that builds up over the years. Signs you might need one include cold spots at the bottom of radiators, noisy pipes, or slow warm-up. We will tell you honestly at survey whether a flush is worthwhile or not.
A full system power flush starts at £495. That covers a whole-system, radiator-by-radiator flush with chemical agitation, a fresh dose of corrosion inhibitor, a new magnetic filter on the return, and a flush certificate for your warranty records. We confirm a flush is actually needed before we quote.
A full central heating installation usually takes two to four days, depending on the size of the property and how much pipework is involved. A first-time system, or one routed through an older house with awkward access, sits at the longer end. We give you a realistic timescale in writing before any work starts.
Cold patches at the bottom of a radiator usually mean sludge has settled inside it, while cold at the top points to trapped air that bleeding will fix. Sludge across several radiators is a sign the whole system would benefit from a power flush and a magnetic filter to keep it clean afterwards.
Yes. We can add radiators to cold or newly converted rooms, swap old ones for more efficient modern panels, and reposition radiators as part of a refit. We will check your system has the capacity to run extra radiators well, because adding them without enough boiler output just spreads the heat too thin.
A like-for-like radiator swap starts at £120, with extra radiators in the same visit at £80 each. A brand-new radiator install starts at £150, or £100 each for additional ones. That is labour only, so you can supply the radiator or we will quote one in for you.
Yes. We fit and set up smart thermostats such as Hive, Nest and Tado, and zoned controls where they make sense, so you heat the rooms you use when you use them. Better control is one of the simplest ways to trim a heating bill, and we walk you through the app before we leave.
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