Our Greenstar 2000 is our lowest priced combi boiler, suitable for apartments, small and medium sized homes with one bathroom. This is our quietest combi boiler, and has been designed to provide an attractive solution that comfortably fits between standard kitchen cupboards. When you choose a Greenstar 2000 combi boiler, you'll also receive a 5 year guarantee as standard, or 6 when installed with a Greenstar System Filter.