Because combi boilers don’t need to store a tank of hot water, they are generally considered the more efficient choice however, in some situations a conventional boiler might suit your needs better, so do consider all your options before making a decision. We'll do whatever it takes to address your plumbing concerns and leave you satisfied! Thanks for all these great tips. With state-of-the-art technology, to find cracked pipes is simple! Call us now on our hour helpline. Safe alternative.