Install cylinder at ground level in existing safe tray drilling drain to external if required<br />
Install heat pump on roof <br />
Cut walls remove cupboards drill timbers as required not responsible for patching or painting<br />
Run heat pump slime return copper through internal walls using high temp fittings where required <br />
Insulating with 13mm insulation<br />
<br />
Extra cost covers labour required cutting, drilling holes<br />
Extra copper and insulation <br />
High temp fittings <br />
Roof peno kit