From OpenStreetMap Wiki
|shop = fireplace|
|A shop selling fireplaces, wood stoves, ovens and similar goods.|
|Used on these elements|
|Status: De facto|
|Tools for this tag|
A shop selling fireplaces, wood stoves, ovens and similar goods.
As of 2010.12.12, there are 3 shop=oven nodes, six shop=fireplace, one shop=fire-place and three shop=fireplaces.
Thus shop=fireplace is adopted as defacto standard.