Hot Water ....

All homes use hot water. How that hot water is produced can be by various appliances.

Frequently asked Questions.

Which appliances give us hot water?

• Boiler (combi, system, or regular)

• Immersion heater (in a hot water cylinder)

• Electric or gas water heater

• Heat pump water heater

• Solar thermal system

What is the cheapest way to heat hot water?

• Using a gas boiler on a timer is generally cheapest (where mains gas is available).

• If you have solar thermal panels, using solar energy is cheapest (free after installation).

• In homes with cheap off-peak electricity (Economy 7), using an immersion heater during off-peak hours can be cost-effective.

Which type of water heating system is the most energy efficient?

1. Solar thermal + efficient backup (best overall, but weather-dependent).

2. Heat pump water heater (very efficient, especially in well-insulated homes).

3. Modern condensing gas boiler (efficient and widely used).

⚠️ Is Cylinder Safe? What Are the Risks?

An hot water cylinder is a safe and highly efficient way to store hot water — when it’s properly installed and regularly serviced.
However, like any pressurised system, it carries some potential risks if neglected:

✅ Pressure build-up – modern cylinders have multiple safety valves to prevent dangerous pressure.
✅ Scalding – fitted with temperature controls and mixing valves to keep water at a safe temperature.
✅ Water damage – leaks from wear and tear or faulty parts can cause damage if not caught early.
✅ Installation quality – cylinders must be fitted and maintained by a qualified G3-certified engineer.

Does a water heater have to be maintained?

Yes, water heaters whether gas or electric require annual maintenance to ensure all safety devices are functioning correctly. If your appliance is covered by Manufacturers Warranty it will be a stipulation in their Terms & Conditions.

Is it better to have hot water on constant or timed?

• Timed is usually better — heat water only when needed. Constant heating wastes energy by keeping the tank hot all day.

Are washing machines connected to hot water in the UK?

• Most modern UK washing machines are cold-fill only — they heat water internally as needed. Some older models may have hot and cold connections.

Does a dishwasher use hot water in the UK?

• Most UK dishwashers are cold-fill only — they heat water internally to the required temperature. Some models can be connected to a hot water supply if desired.

☕ Boiling Water Tap

(provides instant boiling water at the tap)

Pros
✅ Instant hot water — no waiting
✅ More convenient for frequent use (tea, coffee, cooking)
✅ Saves space — no kettle on the worktop
✅ Can be more energy-efficient if used often
✅ Modern taps often filter water

Cons
❌ Higher upfront cost (purchase + installation)
❌ Requires space under the sink for the tank
❌ Needs annual maintenance/filter changes
❌ Uses standby energy to keep water hot
❌ Installation may not be suitable for all sinks/kitchens

Our Expert Engineers can rectify any issues you may be experiencing, carry out routine maintenance or install all types hot water appliances. Book today.