removal of gas combi boiler and three rads.

Work involved: • Remove and safely cap the gas supply (Gas Safe engineer required) • Remove combi boiler and radiators • Install electric hot water cylinder • Connect to cold mains supply • Connect hot outlet to taps • Install electrical supply (fused spur) • Install safety discharge pipe (for unvented cylinder) This type of system is efficient and ideal when hot water demand is low.

Since you already have electric radiators and an electric shower, your space is essentially "gas-free." Because you only need hot water for hand washing (sinks), you have a few options that are much simpler than a traditional full-sized unvented cylinder. Here is what the installation of a hot water cylinder—or a smaller alternative—would involve for your specific setup: 1. Choosing the Right Size Since you don't have a bath and your shower is independent (electric), a standard 120–200 liter cylinder would be overkill. It would waste energy keeping that much water hot. • Small Unvented Cylinder (10–15 Liters): Perfect for 1-2 sinks. It sits under the sink or in a nearby cupboard. • Direct Cylinder (50–80 Liters): If you want a larger "buffer" or have multiple sinks running at once. • Instantaneous Water Heater: An alternative to a cylinder that heats water on demand (like your shower), requiring no storage tank at all. 2. The Installation Process If you proceed with a stored hot water cylinder, the installation typically follows these steps: Water Connectivity The installer will tap into your existing cold water mains. Because it is a "Direct" system (heated by electricity, not a boiler), the cold water goes into the bottom of the cylinder, and the hot water is pushed out of the top to your taps. Electrical Requirements • Immersion Heater: The cylinder will use an immersion rod to heat the water. • Wiring: This usually requires a dedicated 20-amp or 30-amp circuit from your consumer unit (fuse box). Since you already have electric radiators and an electric shower, a qualified electrician must ensure your total "load" doesn't exceed the capacity of your main house fuse. Discharge Pipework (G3 Regulations) If you install an unvented cylinder (which runs at mains pressure), it must have a safety "Tundish" and a discharge pipe (D1/D2). This pipe carries boiling water safely outside the building if the system over pressurises. 3. Key Considerations for Your Setup • Space: A 10L or 15L "oversink" or "undersink" unit is the most non-intrusive. It’s about the size of a large backpack. • Maintenance: Stored water systems require an annual check of the Pressure Relief Valve (PRV) and the expansion vessel to ensure they haven't failed. • Heat Loss: Even small cylinders lose some heat through the jacket. An instantaneous electric water heater might be more efficient for your "hand wash only" requirement as it only uses power when the tap is turned on.