Combi can you even still get traditional boilers? Constructionline are a health & safety accreditation scheme for the construction industry. We can help supply a variety of products for all of your heating and cooling needs from kohler and lennox to grundfos and maxx, we have it all and much more! Limited potential for hazards to health or the environment at least some ingredient disclosure. But when is the right time to replace your boiler, and what should.