WELCOME TO E S I, ALARM INSTALLATIONS IN BOLTON & BEYOND Your Home Security Expert. Call today for a free home security assessment. No salesperson will call, only a CRB checked, fully trained security engineer will ever visit your home. We take your security seriously which is why we will never share your details with a third party. No money up front, payments are taken on completion of works. We work closely with high end distributors to offer the latest technology at affordable prices. Enga Security Installations Oystein Hansen, Proprietor.