Hot water cylinder

Unvented cylinders are most popular in UK.

•  direct unvented cylinder utilises electricity to heat
• an indirect unvented cylinder utilises gas from a boiler to heat the water
• requires regular maintenance by a professional
  Vented cylinders are known as the traditional option.
  located higher, e.g. in loft, and use gravity for water pressure

Heat loss in a gas water heater goes up the flue. So insulating your tank doesn’t do much.

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• heat pump
  • electric immersion heater in hot water cylinder (simplest solution)
• avoid drinking from the hot water tap
  • advised to not drink water from a hot water cylinder, since it’s likely stale.
• shower
  • water from hot water cylinder or a electric instant boiler
• Instantaneous water heater
  • Described as tankless because it removes the need for a hot water cylinder
• Immersion Diverter
  • use excess energy from solar panel to heat water in your hot water cylinder, once your home battery is full.
• shower temperature
  • Because of Legionella risk, water in the hot water cylinder is stored at 60C.