Eu finalmente ouvi falar de King hoje (muito útil quando você recebe uma resposta). Responde minhas perguntas. Também verifiquei que era o "elemento" de aquecimento, tirando-o de um trabalho, então eu só tive que substituir isso!
resposta do King (fabricante):
Yes this is our W series https://www.king-electric.com/pdfs/W_WEB.pdf These have a 1 year warranty.
Here is the element http://www.morelectricheating.com/default.aspx?page=item+detail&itemcode=KINGELECTRIC50303&catlist=1363&parent=7983
Its best to go by our catalog for dimensions. Other sites are popular for getting the diminsions wrong. The dimensions have been the same since the unit came out in 1992
Here is the unit you need http://www.morelectricheating.com/default.aspx?page=item+detail&itemcode=KINGELECTRIC12743&catlist=262&parent=1366