We are constantly working on our distribution network. Drain testing specialists scanseal. Is there anything wrong with this page? Condensing boilers improve efficiency to over 90% which would save you a minimum of 30% per year on your home heating bills and represents a big saving over the lifetime of your boiler. Can they provide you with local referrals? Eco- friendly heat only boilers. You’ll find returns information on your delivery note exceptions apply to certain products.