It fits in direct replacement of a 400 x 400 rooflight. Its a cooler as well as a heater. It come off a 2005 caravan, and when tested started up fine, heated up and cooled down, however you may choose to have it serviced, and regased for piece of mind, I'll leave it up to you. This is for collection only, during our normal opening hours.Capes and McLeod Leisure LTD Caravan Sales Uckington Shrewsbury Shropshire SY44UL Any questions please call 01952 740899. First picture is library picture to show you what It looks like when new. Collection only Please view other items I have for sale as I'm having a clear out. The item "DOMETIC CARAVAN MOTORHOME CAMPERVAN AIR CONDITIONING UNIT B1500S" is in sale since Wednesday, August 16, 2017. This item is in the category "Vehicle Parts & Accessories\Motorhome Parts & Accessories\Caravan Parts\Mobile/ Touring Caravan Parts". The seller is "capesmcleod" and is located in Shrewsbury, Shropshire. This item can't be shipped, the buyer must pick up the item.