Made my own measurements of my existing fireplace and rang designer fireplaces (DF) to order a new model. DF staff talked me through the order and made some slight adjustments to my dimensions to accommodate the design I had selected. (Can't beat expert knowledge) The fireplace when delivered was exactly what I required and fitted the existing marble backing and hearth perfectly requiring no adjustments. To double check the DF staff who delivered the new fireplace insisted in offering it up to position to check there were no problems, there were not. The delivery man also left me a full set of wall mountings and a tin of oil to treat the wood of the new fireplace. Would recommend this first class company to anyone with no reservations.