As a general rule, heat spreads differently depending on the type of heating system, each has its advantages and its disadvantages.
Before making a decision, be sure that your garage’s electric circuit is designed to handle the planned heating load. Whether you choose a system that works at 120 V or at 240 V, 1000 W remain 1000 W. Consequently, electricity costs will be the same.
To avoid heat losses that can increase your electricity bill, we suggest you adequately insulate your garage and avoid leaving the door open unnecessarily.
We encourage you to consult a heating devise specialist who can better advise you on the matter.