Who does this service and receive an amazon gift card! Xisting swale heating customers can enjoy the same annual boiler cover plan for just £. per month if their boiler was installed by us and is still in its warranty period. Learn what you can do to help your systems run smoothly and reliably! If you don’t see the brand you are looking for, contact us to discuss your options. Great customer service! very trustworthy people!! Click the image below to enlarge. Got a tip, kitchen tour,.