DO NOT RENT A COMPRESSOR! You will be using the vacuum for a very long time (Days) the dust will get EVERYWHERE!
What I have done in the past is get a painters drop cloth and fold it up and shove it under the radiator and another folded one behind the radiator. Then take a garden type sprayer and spray water to clean the dust and hair, and if needed then spray a all purpose cleaner, then rinse and let drip dry. take the drop cloths to the laundry and go to the next radiator. This system always works for me. Good luck