Heating system quote

Maverick192

Have just had the following quote in the South East (Crawley) for a major heating system upgrade. Is this reasonable?

• Drain system and remove existing boiler, fitting vent over flueway.
• Fit Alpha CD18R condensing boiler (in a new position) with flue assembly and plume management system.
• Extend existing gas supply from meter to new boiler position.
• Supply and fit condensate pipework.
• Drain, disconnect and remove existing hot water cylinder. Replace with new cylinder and immersion heater. Convert the system to fully pumped (currently gravity fed).
• Supply and fit new programmer, pump, motorised valve and room thermostat.
• Extend pipework to three bedrooms and bathroom and install radiators in those rooms (the property has no heating system upstairs).
• Supply and fit thermostatic valves to the existing downstairs radiators.
• Fit a gas fire, including extending an existing gas supply to the point of installation.
• Manual flush, re-fill and chemical inhibitor and commission.

Quote is £4048 including VAT.