Hi guys, this time i´m working on a small fan heater for an incubator (chicken incubator), i´ve found many ways based on NiCr wire, but thinking allways find other ways is always good help, so in my case i have no acces to NiCr wire unless some of my musician friend give me some of theyr guitar strings, which i probbably will not have since this is important for them, so i was thinking on a heater based on resistance, i´ve found some basic ideas on the web, but asking the right people always come handy, so in my case i need about 80 watts heater (same as a standar 110v bulb light), and i´m thinking to conect this to a 12 to 17 volts supply, so wich calculation do i have to apply to make it possible?, if 115Volt is better i could do too (not prefered since it is dangerous), any idea will be welcome guys, cheers.