yes one on that idea , mine are red tin , not cast aluminum , from NAPA auto parts , same thing I'd guess . Yes if you get more heat you need more electric , only reasonable . The gen sets need , like, to be warm , you do not have to leave your dodge plugged in 24/7 like the gen set is , yes a 12 gauge extension cord , the shorter the better , and a 120 volt / 20 amp circut , a timer rated for the 20 amps (?) ( I'm the timer for mine ) It says thermostatically controlled , but there is NO dial ..... on mine .... I didn't like the idea either , it was all I could grab quick , years later I started installing the freeze plug ones ... better I thought , 1 in 1 of my trucks didn't seem it DO much plugged in all nite , next truck ( GF'S daily driver) Nice guy put one on each side of block , a Y extension plugged 'em BOTH in LOL NO difference from the 1 heater .. 2 x the power used ..... next truck got the tank type ... live / learn . Trick part of those kits , the nipple with 1/4pipe thread and 5/8ths hose barb ... .. IF you can BUY sillycone heater hose , its very good stuff ( expensive too ) allthough rusty , the tin ones have lasted me for years .... so far .... 2 hours and the motor is happy , heat in a few minuets , DO NOT run motor with any heater plugged IN , BAD for heater ....