Real SwiftHeat UK workmanship
Baxi 830 Combi Boiler Replacement in Whitchurch, Cardiff
Whitchurch, Cardiff · Completed
A complete heating upgrade with system protection, existing Hive controls and a ten-year manufacturer’s warranty.
When their Main boiler began failing and no longer provided the performance and reliability they needed, this homeowner turned to SwiftHeat UK.
The project
Replacing the failing Main boiler.
On 26 March 2026, SwiftHeat UK Group Ltd supplied and installed a Baxi 830 30kW combi boiler, bringing together a new appliance, system cleaning, protective components and a new vertical flue.
The replacement combines central heating and on-demand hot water in one appliance, without a separate hot-water cylinder. Its 30kW designation relates to hot-water output; boiler selection also considers the home’s heating requirements, household demand and mains water supply.
Assess First. Recommend Second.
The installation at a glance.
Baxi 830 30kW combi
A new gas combination boiler replacing the customer’s failing Main appliance.
Existing Hive V4 controls
Connected to the Hive V4 smart thermostat previously installed by SwiftHeat UK.
Warranty and workmanship cover
Ten-year Baxi parts-and-labour warranty and a separate twelve-month SwiftHeat UK installation guarantee, subject to their respective terms.
Preparing and protecting the system
Cleaning, filtration and pressure-shock protection.
The installation included a full chemical system flush to help remove sludge and contamination from the heating circuit.
A magnetic system filter was fitted to capture circulating magnetic debris, supporting ongoing protection of the boiler and heating system. We also fitted a shock arrestor to help reduce water-pressure shocks affecting the boiler and connected pipework.
These components support system care alongside appropriate servicing and maintenance.
Keeping the customer’s existing Hive V4.
SwiftHeat UK had previously installed the homeowner’s Hive V4 smart thermostat. We connected the new boiler to those existing controls so the customer could retain their familiar heating schedules and temperature settings.
A new vertical flue and roof repair.
The work included a new vertical flue system and roof repair at the previous flue location, addressing both the new appliance connection and the area affected by the former flue.
Professional completion
Commissioning and certification.
The boiler was professionally installed and commissioned. The customer was issued a Gas Safety Certificate and Building Regulations Certificate.
The photograph shows the engineer working at the boiler. The completed checks and documentation provide the supporting technical record.
Two distinct layers of protection
Ten-year manufacturer’s warranty. Twelve-month installation guarantee.
This installation includes a ten-year Baxi manufacturer’s warranty covering parts and labour, subject to the manufacturer’s applicable terms and servicing requirements.
SwiftHeat UK provided a separate twelve-month installation guarantee covering our workmanship, subject to its terms. The cover described here relates to this customer’s agreed installation package.
Understand boiler warranty and guarantee coverLocal advice and customer care
Planning a boiler replacement in Whitchurch?
An ageing boiler does not automatically need replacing. If yours is becoming unreliable, losing pressure or making unfamiliar noises, a professional assessment can help establish the cause and whether repair or replacement is appropriate.
SwiftHeat UK supports homeowners across Whitchurch, Cardiff and South Wales with clear advice, boiler installations and ongoing heating care.
Call 0800 043 3464 or email info@swiftheatuk.co.uk.
SwiftHeat UK Group Ltd · Gas Safe registration 978273.
Engineering. Care. Accountability.