We are redoing our kitchen and I want to move the fridge to a different location. This area has a forced hot water radiator along the wall. I'm thinking its not a good idea to have the heater behind the fridge? This radiator is a 1/2 - 3/4" copper with fins along the length of it. Its covered by a metal shield. Can this be cut and shortened or do these units have to be bought at the length you want???