Salon New Client Welcome Letter What Is The Cheapest Form Of Heating For My Hair Salon?

What is the cheapest form of heating for my hair salon? - salon new client welcome letter

What is the cheapest way to heat my beauty salon?
I have only 2 heat from the room because the heat is not the whole day and night consumption of electricity away to the heat. What do consume less power heaters to warm room for the guests? All of your advice.