What comes out
The hot water cylinder — usually from the airing cupboard — and the feed tanks in the loft, along with the pipework that served them. All of it leaves with us. What you get back is an airing cupboard that stores things and a loft without tanks overhead.
What gets re-run
Moving from stored hot water to on-demand means re-running pipework so the new combi feeds taps and radiators directly, making good where the old kit came out, and rebalancing the whole system so every radiator heats evenly. This re-engineering is why a conversion starts at £2,699 rather than the swap price, and why it takes two days rather than one.
Why people do it
For most three-bed houses across Birmingham it is the change that makes the biggest difference to running costs and loft space — no stored water going cold on a timer, one appliance doing everything on demand. The honest exception: two or more bathrooms showering at once is where a combi struggles, and if that is your house, we will say so at the survey.
The two days
Day one is the heavy work — decommissioning, removal, pipework. Day two completes, commissions and hands over: system cleaned and dosed, thermostat paired, warranty registered, paperwork left with you. The full walkthrough lives on the conversion page.