Elnur Ecombi High Heat Retention (HHR) Storage Heaters come Complete with a 12 Year warranty*. Elnur IEM (Integral Energy Manager) automatically adjusts charging to suit the climate and demands on a daily basis. It also manages the discharge to ensure heat is always available when needed. The HHR is fan assisted to aid and reduce warm up times and has a built in temperature sensor sensitive to 0.1°C. Ecombi HHR reduces energy costs and saves energy for times when it is specifically needed.