I'm looking at IKEA's Frostig BCF228/64 integrated 70/30 fridgefreezer as it has auto defrost on both compartments - and a 5 year guarantee!
The FF has a depth of 560mm and width of 540mm. The housing unit is 570mm wide and deep, so I'm OK on the width, but is 10mm sufficient at the rear. I know I have to provide top and bottom venting of 200cm2.
IKEA can't answer this question and Whirlpool's (the manufacturer) customer support team can't find this model on their system.