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Pricing Guide

SCAN TO GET IN TOUCH

BOILER INSTALLATION & REPLACEMENT
SUPPLY & INSTALL

 BOILER REPLACEMENT

 

BAXI 400 COMBI 2.1 from £2000

(5-Year Warranty)

 

 ATAG COMBI from £2400 

(Up to18-Year Warranty)

 

ATAG ECONOMISER Built-in flue heat recovery for lower gas bills, from £2850

(Up to18-Year Warranty)

Full System Powerflush Included

 System optimisation for   Maximum Efficiency

NEW BOILER INSTALLATION

For New Builds, Extensions or New Heating Systems.

from £1800

Gas, heating,  water connection.

System balancing & commissioning

 

BOILER CONVERSION

 

BAXI 400 Combi 2.1 from £2800

(5-Year Warranty)

 

ATAG COMBI from £3200

(Up to 18-Year Warranty)

 

ATAG ECONOMISER Built-in flue heat recovery for lower gas bills, from £3650

(Up to 18-Year Warranty)

 

Open vent system to  Combi

Back boiler to Combi

Full System Power Flush included

System Optimisation for Maximum

Efficiency

SYSTEM BOILER WITH UNVENTED CYLINDER

 

from   £3800

Full Commissioning & G3 Certification

ELECTRIC BOILER WITH UNVENTED CYLINDER

 

from £3500 

We don't just replace boilers- we optimise entire heating system

Final price depends on:
- Boiler model and output

- Flue type  and length 

warranty option ( up to 18 years available)
- Condition of the existing system
- Required pipework alterations
- Size and complexity of the heating system


 

UNVENTED CYLINDERS INSTALLATION & REPLACEMENT
SUPPLY & INSTALL

UNVENTED CYLINDER REPLACEMENT

from £1800 

UNVENTED CYLINDER INSTALLATION

from £2000

VENTED TO UNVENTED CYLINDER UPGRADE

from  £2800 

 

 

 

 

Final price depends on:
- Cylinder size and specification
- Condition of the existing system
- Pipework and discharge requirements
- Mains pressure and required upgrades


G3 certified installation

 

UNDERFLOOR HEATING INSTALLATION

NEW BUILD UNDERFLOOR HEATING

from £80 to £110 per m²

RETROFIT UNDERFLOOR HEATING

from £130 to £180 per m²

Price includes:
- System design and layout
- Supply and installation of pipework
Manifold and controls
- Installation of low-profile panels (retrofit systems)
- Connection to existing heating system
System filling, testing and commissioning

Retrofit systems are designed to minimise floor height increase and disruption.

Prices may vary depending on:
- Floor area and layout
- Type of system and controls
- Floor construction and insulation
-Number of heating zones

All installations are completed in-house to ensure quality and performance.


 

SPECIALIST PLUMBING

FLOOR-MOUNTED TAP INSTALLATION

from £350

COMPLEX INSTALLATION

(concrete floors, limited access or extensive pipework modifications)

from £800 
 

PIPEWORK ALTERATION

from £150 

COMPLEX PIPEWORK

(hidden pipe runs or major modifications)

from £500 
 

FLOOR BREAK OUT AND REINSTATEMENT 

from £250

BESPOKE PLUMBING SOLUTION

from £300 

What’s included:

-Site assessment and planning Pipework modifications and rerouting

- Structural preparation (floor breakout, base installation)

- Accurate positioning and alignment

- System testing and commissioning

Prices include installation and standard materials.

Floor-mounted taps and specialist fixtures are not included and can be supplied by the client or sourced on request
 

We provide a fixed, transparent quote after a full assessment. No hidden costs. 

       Fixed quote after on - site survey

Nexosters plumbing and heating Swansea logo

 

 

 

​Nexosters Ltd

Company No: 17018059

Gas Safe Reg.No: 642942

Swansea

© 2026 Nexosters

Specialist Plumbing & Heating


Swansea & South Wales

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