Most central heating installations done badly start with a quote-by-postcode boiler swap. Most done well start with a heat-loss calculation. We do heat-loss calculations.
For a meaningful upgrade, adding a second bathroom, converting a loft, replacing 1970s pipework, going from heat-only to combi, the right answer isn't 'what fits in the cupboard' but 'what does the property actually need'. We measure the heat-loss across every room, calculate flow requirements, verify mains-water pressure, and only then specify the system. If you are not ready to upgrade yet, a central heating system check and survey will show how your existing setup is performing.
Our installation team holds manufacturer-trained accreditations for Worcester Bosch, Vaillant, Ideal and Viessmann, meaning we can offer the full extended warranties (up to 12 years) only available through accredited installers. Every install is registered with Gas Safe Register and Building Control automatically.
Where this service applies
- Old boiler + radiators upgrade, full system refresh
- Combi-to-system conversion (added bathroom, wanted simultaneous-use hot water)
- System-to-combi conversion (free up cylinder space, simplify)
- Multi-zone retrofit (upstairs/downstairs separate control)
- Loft conversion or extension, heat-loss recalculation and pipework extension
- Old gravity-fed system replaced with sealed pressurised system
- Underfloor heating retrofit alongside existing radiators
- Fuel-switching projects (gas to heat pump - we partner for this)
How we deliver
No surprises, no upselling. The exact path every job follows.
- 1
Free site survey
Heat-loss calculation per room, mains pressure test, gas pressure test, flue route assessment. - 2
System design
Boiler size, cylinder size (if applicable), pipework layout, control strategy. - 3
Detailed written quote
Itemised: boiler, cylinder, pumps, valves, controls, pipework, materials, labour, removal. - 4
Installation scheduled
Typically 3–7 working days for a full system replacement. We hold stock of major models. - 5
Strip-out & first-fix
Old system removed. New pipework, controls and pumps installed. - 6
Boiler & cylinder fitted
Boiler hung, cylinder set, flue installed and pressure-tested. - 7
Power flush, inhibitor, magnetic filter
Standard on every install. - 8
Commissioning & sign-off
Full FGA, system balancing, customer hand-over with controls walkthrough. - 9
Manufacturer registration & Building Regs
Submitted automatically. Certificates within 30 days. - 10
Aftercare
Annual service reminders, 12-month workmanship guarantee, manufacturer warranty up to 12 years.