Can I replace my old combi with a new combi?

Usually, yes. A like-for-like combi replacement is the simplest job. We check the flue, gas supply and condensate route, and confirm whether the existing pipework and radiators are suitable.

Can I convert from a tank and cylinder to a combi?

Often. The conversion removes the tanks and cylinder, caps the old pipework and changes the hot water to mains pressure. It depends on the gas supply, water pressure and flue route. We check all three before quoting.

Will a combi run two showers at once?

It depends on the boiler's hot-water output and the mains flow rate. A higher-output combi can serve two bathrooms, but simultaneous use will always reduce flow at each outlet. If two showers at once are essential, a system boiler with a cylinder may be better.

Do combi boilers need a tank in the loft?

No. A combi takes water directly from the mains and heats it on demand. That is one reason they are popular in Edinburgh tenements, where loft space is often shared or unavailable.

How long does a combi boiler last?

With correct installation, annual servicing and a clean system, a Worcester Bosch combi can last 10 to 15 years or more. Water quality and system maintenance make a real difference.

Combi boilers · SD Plumbing & Heating

Hot water on demand.
No tank. No compromise.

Worcester Bosch combi boilers fitted across Edinburgh by SD Plumbing & Heating, from cupboard swaps to full tank-and-cylinder conversions. We will tell you honestly if a combi is not right for your home.

Get a fixed quote 0131 392 8722

Combi installation, priced in writing

No tank or cylinder

Mains-pressure hot water

Frees up cupboard and loft space

Worcester Bosch only

Get a fixed quote

Is a combi right for you?

Great for flats.
Not always for families.

A combi is the simplest solution for most Edinburgh flats. It is not automatically the best solution for a busy house with three bathrooms.

Good fit

One-bathroom flats and smaller houses
Homes without space for a cylinder
Tenements with a workable flue route
People who want mains-pressure hot water

Think twice

Three bathrooms used at the same time
Low mains pressure or flow
No viable flue route
A gas supply that cannot be upgraded economically

Edinburgh-specific

Can your tenement
take a combi?

Usually, yes. The flat is rarely the problem. The flue, the gas supply and the water pressure decide it.

Flue route

Rear wall, rear court, roof or shared chimney. We check the route and clearances before quoting.

Gas supply

Older tenements can have undersized pipework. Upgrading is possible, but it adds cost and disruption.

Water pressure

Top-floor flats can have lower pressure. We test the flow and tell you what to expect.

Tank removal

A conversion removes the old tanks and cylinder and caps the pipework. Access to the loft or cupboard matters.

What a conversion includes

Removal of tanks and cylinder
Capping and rerouting old pipework
Gas supply check and upgrade if needed
New combi, filter and flue
System flush, inhibitor and commissioning
Guarantee registration and handover

A conversion is more work than a like-for-like swap — pipework, flue and access all change. It is priced separately in your written quote.

The range

Pick your combi.
See the real price.

All three are Worcester Bosch condensing combis. The difference is output, controls and the guarantee you can achieve.

Worcester Bosch

Greenstar 1000

The smart-money swap

25 or 30 kW combi

Best for

1-bath flats and smaller homes

Guarantee

Up to 10 years

The honest entry point into Worcester Bosch. No touchscreen, no theatre — just a proven, compact combi with simple controls and genuine Bosch engineering.

25 or 30 kW combi output
Compact cupboard-fit casing
Backlit LCD controls
Compatible with a Greenstar system filter
Gas Safe installed and commissioned

Extended guarantee available on selected models, subject to Worcester Bosch terms and annual servicing.

0% finance available · subject to status

Get a fixed quote

Worcester Bosch

Greenstar 4000

The Edinburgh default

Most fitted

25, 30 or 35 kW combi

Best for

2–3 bed tenements and houses

Guarantee

Up to 10 years

The boiler we fit most. Enough hot water for a family bathroom, quiet enough for a cupboard beside a bedroom, and the best balance of price and performance in the range.

25, 30 or 35 kW combi output
Clear backlit text display
Quiet operation
Compatible with smart controls
Greenstar system filter available

Extended guarantee available on selected models, subject to Worcester Bosch terms and annual servicing.

0% finance available · subject to status

Get a fixed quote

Worcester Bosch

Greenstar 8000 Style

The statement piece

Best in range

Worcester Bosch Greenstar 8000 Style boiler

30, 35 or 40 kW combi

Best for

Larger homes and two bathrooms

Guarantee

Up to 12 years

Black glass, full-colour touch controls and serious hot-water output. For homes where the boiler is on show and two showers cannot wait.

30, 35 or 40 kW combi output
Black glass front
Full-colour touch display
Higher hot-water flow rate
Greenstar system filter available

Extended guarantee available on selected models, subject to Worcester Bosch terms and annual servicing.

0% finance available · subject to status

Get a fixed quote

Questions

Combi boiler questions.

Output, conversions, two showers and everything else Edinburgh homeowners ask.

It depends on the boiler, the flue route and the access. We do not publish prices online — after a free survey we send a fixed written price for the property.

Ready when you are

Tell us about the job. We price it properly.

A free survey by one of our specialists comes first — in person or from your photos. Then a fixed written price for the property.

Get a fixed quote 0131 392 8722

Trusted, respectful — a team you can rely on

Hot water on demand.No tank. No compromise.

Great for flats.Not always for families.

Can your tenementtake a combi?

Pick your combi.See the real price.

Greenstar 1000

Greenstar 4000

Greenstar 8000 Style

Combi boiler questions.

How much does a combi boiler cost in Edinburgh?

Can I replace my old combi with a new combi?

Can I convert from a tank and cylinder to a combi?

Will a combi run two showers at once?

Do combi boilers need a tank in the loft?

How long does a combi boiler last?

Tell us about the job. We price it properly.

Hot water on demand.
No tank. No compromise.

Great for flats.
Not always for families.

Can your tenement
take a combi?

Pick your combi.
See the real price.