Features aluminium-coated stainless steel heat exchanger, brass hydraulic block, easy-to-use controls, self-diagnostics, weather compensation, anti-seize function and frost protection. Max. Central Heating Output: 30.6kW Stainless Steel Heat Exchanger Top Flue Outlet For use with Vented or Unvented Indirect Cylinders Compatible with Solar Panels 7 Year Manufacturer's Guarantee (T&Cs Apply) 100,000BTU LCD Display Brass Hydraulic Sections Max. Central Heating Output: 30.6kW Stainless Steel Heat Exchanger Top Flue Outlet For use with Vented or Unvented Indirect Cylinders Compatible with Solar Panels 7 Year Manufacturer's Guarantee (T&Cs Apply) 100,000BTU LCD Display Brass Hydraulic Sections