The theory behind using a powerful magnetic field to improve fuel burn in combustion engines is nothing new. Magnetic fields were use to improve the combustion of fuel as early as 1940s. The US air force used magnets on their Mustang aircraft and produced greater range and performance from poor quality fuel. In 1952, Felix Bloch and Edward Mills Purcell were jointly awarded a Nobel Prize for their work on magnetic fields on solid, liquid and gas substances.
There are three ways magnets save energy and fuel.
Attach a magnet to the fuel lead pipe of your burner. The magnet conditions the fuel allowing greater combustion. This happens immediately. You produce more heat for the same amount of fuel and harmful emission is cut. I have Calorgas (Liquid Petroleum Gas) central heating. Since attaching a magnet, my direct debit has been cut by 110%. If your boiler is old and inefficient, instead of buying a new boiler, try a magnet first.
