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Worcester-Combi-Greenstar Heatslave 18-25
Part No:7716100098
Discontinued
Product Information
The Greenstar Heatslave 18/25 is part of a market-leading range of energy-saving condensing oil-fired boilers from Worcester combi series. At least 90% of the oil consumed by a Greenstar Heatslave condensing combi boiler is converted into heat for the heating and/or hot water system and help to cut heating and hot water bills by between 5-10%. The Greenstar Heatslave 18/25 is appropriate for a small to medium sized, 1 bathroom apartment, house or bungalow. The Greenstar Heatslave 18/25 is ideal for replacing an existing boiler located in a utility room, garage or kitchen.
Greenstar condensing boilers deliver this energy-saving performance by recycling exhaust gases to extract and re-use latent heat - a highly efficient use of energy which also significantly reduces carbon dioxide in the atmosphere.
Pick up only NO DELIVERY - you must make arrangements to pick item up.
Key Features:
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SEDBUK A Rated – environmentally friendly
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Pre-heated thermal store – instantly heated hot water
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Optional fascia mounted programmer – reduced wiring 18kW, 25kW and 32kW DHW (domestic hot water) and CH (central heating)
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More than 90% efficient
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5 year warranty (subject to condition)
Specification:
Title | Value |
---|---|
Height (mm) | 855mm |
Width (mm) | 520mm |
Depth (mm) | 600mm |
Weight | 177kg |
SEDBUK Value/band | 90.1% Band A |
Solar compatible | No |
Minimum diameter flue CF | 100mm |
Minimum diameter flue RS | 80/125mm |
Mains cold water inlet | 15mm |
Domestic hot water outlet | 22mm |
Primary vent | 3/4" inch BSP |
Primary cold feed | 1 inch BSP |
Heating flow and return connections | 22mm |
Condensate connection | 21.5mm polypropylene |
Oil connection | 10mm |
Max. primary static head | 30 metres |
Maximum flow temperature | 55/81°C |
Min. primary static head | 1 metre |
Primary water content | 69 litres |
NOx classification | Class 3, 70mg/kWh |
Water side resistance 20°C | 110 mbar |
Exhaust flue gas mass flow | 40kg/hr |
Control thermostat range | 5°C |
Power consumption | 240W |
Ingress protection rating | 20 IP |
Flue reset overheat thermostat (cut out) (°C) | 110°C |
Boiler manual reset overheat thermostat (cut out) | 105°C |
Boiler high limit thermostat (cut out) (°C) | 92% |
Maximum hearth temperature | 100°C |
Maximum horizontal flue RS | 4,000mm |
Maximum vertical flue RS | 6,000mm |
Power supply | 230 AC V 50Hz |
5
1 customer review
5 stars
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Good bargain!
Shelly Lesley from Kent
1 Question
How long should it take for the central heating to warm up on this combi boiler
Asked by Barry David
lynnette replied on 13th August 2013
Showing 1 of 1 questions
Current Item

Worcester-Combi-Greenstar Heatslave 18-25
Discontinued