Sounds like that electrical heater has a major mal... (
Indeed it IS supposed to be high efficiency AND it isn't installed in a very large area, maybe 1200 sq feet. The issue with having it checked is that I seriously doubt the installer was licensed or certified, tends to void warranties. I do believe that it was said that the heat was fine and no issues reported for cold/hot spots, just astronomical power bills and the unit failed within two years so...
As for bending conduit and attaching leads, yeah, it is all fairly simple, the more difficult part is "designing" the circuits and balancing the loads. you have to anticipate what loads might be expected in certain areas and plot out how many, where and what types of outlets, switches and fixtures to "design" into the plans. Anybody pretty much can attach the black to the hot side, the white to the neutral side and the green/bare to the ground screw. of course then you have 220, typical 4 lead 220 would be red-hot, black-hot, white-neutral and green/bare-ground. How he managed to mess up the heater install, supposing of course that he made a mistake, I couldn't tell you, I have been avoiding sticking my nose into that install for obvious reasons.
As for the field being "dangerous", yeah, I have been bitten a time or two, one good one I recall:
Me: And you are positive that was the breaker for the outlets near the bathroom sink?
Motel owner: Yes.
Me: *plugs in a handy test lamp - doesn't light* (should have not been so lazy and gone to my vehicle for multi-meter, like THEY have never failed me...) Okay. awesome, I will have that broken outlet replaced in a "jiffy".
About 5 minutes pass and the uncooperative stiff wires not permitting me to "shove" it all back into the box are starting to frustrate me and I am sweating bullets due to the summer heat. I temporarily forget my common sense and grab the outlet on both sides rather than the two ends like I always grab them and many a choice word later and motel owner apologizing profusely... Between his fits of laughter... I get outlet back into box and am mad as hell at the motel owner, and myself, for my... Enlightening experience...
Yeah, I know not of the "dangers" of which you speak.
As for my place... Nah, the heat is doin' alright... I do have some electrical issues that I will get to... Eventually... Nothing real major, just minor issues, and a very much lower heating bill than that poor woman that can't even use her brand new, less than two year old furnace. She has tried to hint that I could take a look at it but... Let's just say that I ain't none to fond of the color scheme under them buses... I prefer NOT gettin' thrown under one.