My house was built in 1933 and was originally heated by a radiator system. The previous owners had a gas forced air system installed and the radiator system drained. It is presumed to still work but has not been used for at least 5 years. I have considered having the system removed to open a small amount of space on the main floor and even more space in the basement (as well as height). Is it worth removing? If so, how would I go about doing so?