Following a recommendation we used Climazone (www.climazone.net) and were very satisfied. They fit good quality units. Our contact was Alan Daly email: alan@climazone.net Would also be worth geting a quote from Dave of DMF plumbing (www.dmfplumbing.com tel: 966 799 740, or 666 907 456) with whom we have become acquainted since we had the units fitted. Based on other work he has done for us we would be happy to recommend him.