Aqua shield are hull’s biggest installer of atag boilers and as a selected partner and approved service partner you can be assured of a first. Please note that when applying for financial support for your new boiler, you will need to provide the company with some. Are you interested in our no hassle heating plan? if so, which plan? Sign up for the latest news and offers. Very helpful and friendly work carried out with minimum disruption to me and very quickly and efficiently very happy with.