Assert Heating Services delivers complete gas & heating services throughout London and the South East. We perform a vast array of services from simple leaks to modern plumbing, and large scale installs. We are established partners and approved installers of a number of boiler manufacturers including Worchester Bosch and Vaillant. Our customers know that we are committed to our quality of service and aim to deliver an impeccable heating solution to your home or business in and around London. Our expertise is second to none and we pride ourselves on reliable, professional customer service.