Green Flame LonCheckatrade information for Green Flame Londondon, established in 2000 is a locally run family business based in the London area. Thanks to our wealth of knowledge and 15 years of experience we are able to provide first -class standard services for our customers. We offer a wide range of services, domestic and commercial, including: gas installations, plumbing and central heating, power flushing, electrical installation, air conditioning, refrigeration and boiler service. Our Gas Safe™ registered engineers are fully equipped to deal with even the most challenging of situations. We are also Vaillant and Viessmann approved installers.