What is this kitchen appliance?

In a lot of the flat ads I am seeing, there is an appliance in the kitchens - usually juxtaposed to an upper cabinet by the sink.  In this case, it is on the wall by the window.  What is this?

Boiler?

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Boiler?

Agreed.

Did they have to block the window with it?

Thanks.... I'm much more used to seeing boilers be quite a bit larger and centrally located in a building or house.  Definitely not over a sink.

Yep, that's the boiler.

In my kitchen, it's disguised as a cupboard .

No offence dude, but that kitchen looks like one I would build without my wife providing adult supervision.  It looks like the washer and dryer stick out a foot!

And that slopey bit above the sink is going to be inches away from your eyes while doing dishes.