How long does a new heating system take to install?

A full re-pipe with new boiler, radiators and controls in a three-bedroom home is typically 3–5 working days. Smaller upgrades (radiator changes, cylinder swap) are often 1–2 days.

Can I add a radiator to my existing system?

Usually yes, after checking flow rates and boiler capacity. We'll rebalance the system afterwards so the new radiator doesn't starve the others.

Do you install unvented cylinders?

Yes: we hold G3 unvented competence and can install, service and repair unvented systems. Annual safety checks are included on request.

Can you zone my heating between upstairs and downstairs?

Yes: two-zone controls are a straightforward retrofit on most systems and usually pay back within a couple of heating seasons.

Do I need a power flush before upgrading?

If the system is more than 8–10 years old and has never been flushed, a flush before installing a new boiler protects the warranty and the investment. See the Power Flushing page.

Do you replace old radiators?

Yes: swapping tired old panel radiators for modern designer or double-panel units is one of the most cost-effective upgrades on many systems.

Can you install underfloor heating instead of / alongside radiators?

Yes: see the Underfloor Heating page. A mix of underfloor downstairs and radiators upstairs is a very common and effective set-up.

Do you cover my area?

Broad Town, Royal Wootton Bassett, Broad Hinton, Lyneham, Wroughton, Marlborough, Yatesbury, Swindon and Calne.

Is there a guarantee?

All installations are carried out to manufacturer specifications, ensuring your warranty is fully valid. Parts carry their manufacturer's warranty, and boilers and cylinders come with the full factory warranty when we register them. Any workmanship issue is put right personally.

Complete central heating plant board with unvented cylinder, low-loss header and zoned pump group

Whole-system heating

Central heating design,installed and upgraded properly

New central heating systems, full radiator upgrades, cylinder replacements and control retrofits, designed around your home, installed to last, priced clearly in writing.

Request a Free Quote 07920 042880

Gas Safe & OFTEC registered · 18 years' experience · Written quote before work

529962

Gas Safe reg.
C11108

OFTEC reg.
18 years

Experience
£2m cover

Public liability
Free

Written quote

Overview

A straight explanation of what we do, and why it matters

A central heating system that runs quietly, warms every room evenly and doesn't bankrupt you on fuel isn't luck; it's design. Sized correctly, plumbed cleanly, controlled properly.

Back to home

What it is: Full central heating design, installation and upgrades, new systems, radiator changes, cylinder replacements, control retrofits, zoning, and moving from vented to sealed systems. Oil and gas.
Who it's for: Homeowners upgrading or extending across Broad Town, Royal Wootton Bassett, Marlborough, Calne, Swindon and the wider rural Wiltshire area, whether adding radiators for an extension, replacing a tired old system, or moving from a solid-fuel or immersion-only setup.
When you need it: When cold rooms have become a family argument, when a new extension needs adding to the system, when the existing pipework is undersized, when radiators are the ugly old sort, or when the whole setup is simply overdue.
Why professional matters: A well-designed heating system pays back every day it runs, in comfort, in fuel savings and in the boiler breakdowns that never happen. A tacked-together one costs quietly, every day, for years.

The cost of leaving it

What happens when it's ignored

Cold rooms and high fuel bills aren't 'just how the house is'. They're a system problem, and system problems have solutions.

Risks & escalations

Undersized radiators leave rooms cold, drive up thermostat demand and make the boiler run harder for longer.
Old, sludged pipework blocks flow and starves upstairs radiators. Long-term, it wrecks new boilers.
Poor controls leave you paying to heat empty rooms at night.
Vented systems in loft tanks can freeze, overflow and cause thousands of pounds of ceiling damage in a cold snap.
Undersized cylinders leave a family with hot water for one shower and lukewarm for the next.

Common mistakes

Adding an extension onto the existing system without checking flow rates and radiator sizing.
Assuming a bigger boiler will fix cold radiators. Usually it's the radiators, the pipework or the flow, not the output.
DIY'ing radiator swaps and inheriting an air-locked, half-drained mess.
Leaving 20-year-old TRVs on a new system. Half won't be sealing; most won't be responding to temperature properly.

The good news: most heating problems have a diagnosable, fixable cause. We'll walk the system with you and tell you exactly what's going on.

Our process

A clear, five-step system, no surprises

Step 1

System survey

Walk the property, room by room. Radiator sizes, pipework routes, boiler output, controls, cylinder capacity, cold-spot analysis.
Step 2

Heat-loss design

Proper heat-loss calculations for each room drive radiator sizing, boiler output and flow-temperature design.
Step 3

Written quote & options

A clear breakdown | options for radiator style, controls, cylinder type and boiler pairing | with a fixed installation price.
Step 4

Clean install

Pipework routed neatly, joints cleaned, filters and inhibitor fitted, system pressure-tested and flushed before commissioning.
Step 5

Commissioning and balance

Every radiator individually balanced for even flow, controls set up properly, walk-through with you, warranty registered.

The benefits

Concrete outcomes, not vague promises

Warm rooms, evenly

Correctly sized radiators and a balanced system mean the boiler works less and the rooms feel better.

Real fuel savings

Modern controls, sensible flow temperatures and TRVs typically cut heating fuel by 15–25%.

Longer boiler life

Clean system water, magnetic filter, correct inhibitor | the three things that keep a modern boiler alive.

Tidy pipework

Runs planned, boxed and finished properly | not left dangling and 'we'll come back to that'.

Warranty protected

Every install carried out to manufacturer specification and Building Regs, with paperwork on file.

One engineer

Design, install, commission and after-sales | all Ben. Nothing lost in handoffs.

In detail

The technical stuff, explained straight

Where the theory meets the van. Materials, methods, brand differences and the specific situations we deal with week in, week out across Wiltshire.

Radiator design | the part most people skip

A well-designed heating system starts at the radiators, not the boiler. Every room's heat loss depends on external walls, ceiling type, floor construction, window area and desired temperature. Correctly sized radiators warm the space at a sensible flow temperature (55–65°C in most modern systems), letting the boiler modulate and condense properly. Undersized radiators force higher flow temperatures, which stops condensing boilers from condensing, and immediately costs you double-digit percentage points of efficiency. We size radiators room by room, not by rule of thumb.

Sealed vs vented systems

Most modern installations are sealed, pressurised with an expansion vessel, no loft tanks. Cleaner, safer, no risk of loft-tank overflow. Vented systems (with a feed-and-expansion tank) are still valid on older regular-boiler set-ups, and we service and repair plenty. Converting from vented to sealed at the same time as a new boiler is a common upgrade and often makes long-term sense, but not always. We'll advise honestly at survey.

Cylinders | vented, unvented and G3

Unvented cylinders (mains-pressure hot water, no loft tank) deliver strong, balanced hot water to multiple outlets simultaneously, ideal for family homes with two or three bathrooms. They require G3 unvented-competent installation, annual safety checks and specific discharge pipework, all of which we're qualified for and hold current registration on. Vented cylinders remain a solid, low-maintenance option where mains pressure is poor or a loft tank is easy to keep.

Controls, zoning and modern efficiency

The biggest efficiency wins in most Wiltshire homes come from controls, not the boiler. Zoning heating so that upstairs and downstairs can run to different times and temperatures typically saves 10–20% of heating fuel. TRVs on every radiator (bar the one in the room with the thermostat) prevent overheating. Weather compensation reduces the boiler flow temperature on mild days, unlocking more condensing hours. Smart thermostats give useful holiday control and per-zone scheduling. All of it can be added to an existing system in a day or two, no full replacement required.

Extensions, additions and system rebalancing

Adding radiators to an existing system without recalculating flow rates and rebalancing is a common cause of cold upstairs radiators. When you extend a heating system we survey the whole thing, not just the new bits, and rebalance every radiator on completion. A ten-minute job that most 'add-a-radiator' installers skip and everyone lives with for years.

FAQs

The questions we're asked most

Can't see yours? Give us a ring; we don't do sales scripts.

Call 07920 042880

Every property is different, number of radiators, cylinder or combi, pipework accessibility and controls all shift the price. We survey, then quote in writing. Free, no obligation.

Zoned central heating manifold with low-loss header and multiple circulator pumps installed by BTD

Free written quote · no pressure

Cold rooms or a tired old heating system? Let's fix it properly.

Book a free survey and get a written, honest quote. No sales patter, no upsell, no obligation, just a straight answer.

Gas Safe 529962
OFTEC C11108
18 years' experience

07920 042880 Request a Free Quote

Related services

Often booked alongside Central Heating Systems

All services

Underfloor Heating

Power Flushing

Gas Boiler Installation