Boilers: Compare features & prices Worcester Greenstar Heatslave External 18-25 review Back to Results

The Greenstar Heatslave External oil-fired combi boiler from Worcester Bosch comes in an insulated, weather-proof cabinet that's designed to withstand the elements. This allows the boiler to be situated outdoors, which could be ideal if you have limited space in your kitchen or utility room. Read our full review to find out whether the Heatslave External 18/25 is the right boiler for your home.
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Worcester Greenstar Heatslave External 18-25

  • Launch date: Oct 2009
  • Type: Oil
  • Which? score: Subscribe
Typical price
What is this?
Type of boiler Combi
Heat output band (kW) 18-25
Fuel type Oil
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