Scenario #1
Top of Radiator Cover under Sill Plate
 

What is OH?

'OH' (Back overhang) is the amount the top will overhang from the back of the back leg to the back wall.

To Determine 'OH'

Measure from the top of the radiator to the bottom of the sill plate.  If you have two or more inches the top will be able to go under the sill plate 'OH' will equal the toe board plus the quarter round molding.

OH=  ( thickness of kickboard ) + ( thickness of quarter round molding )

Scenario #2
Top of Radiator Cover even with Sill Plate
 

What is OH?

'OH' (Back overhang) is the amount the top will overhang from the back of the back leg to the sill plate.

To Determine 'OH'

Measure from the top of the radiator to the bottom of the sill plate.  If you have less than two inches from the top of the radiator to bottom of sill plate, the top will not be able to go under the sill plate therefore 'OH' will equal the the quarter round molding.

OH= (thickness of  the quarter-round molding)

What is OH?

OH= (Zero)
 

'OH' (Back overhang) is the amount the top will overhang from the back of the back leg to the back wall.

Measure from the top of the radiator to the bottom of the sill.  If you have less than two inches the top will not be able to go under the sill it will have to be equal or over the sill, therefore 'OH' will equal zero.

If you want the top of the cover to be equal with the top of sill we need both dimensions the height of the radiator and the height of top of the sill.

OH=  0"