Homewares retailer Dunelm has appointed Andy Harrison as its new chairman to replace the outgoing Geoff Cooper.The current chief executive of Whitbread, who is part of Dunelm's board as non-executive director, will begin his new role at the FTSE 250 group on 7 July, as Cooper will step down from the position he has occupied since 2004."Andy has a great deal of experience of leading large, listed consumer facing organisations with a strong service offer, and he will be an extremely effective chairman as the Dunelm story enters its next chapter," said Cooper."I believe the future for the group is very bright indeed."Dunelm shares were up 0.22% to 891.50p at 08:47 on Tuesday.