Manuals for Heatwell Water Heaters Model Document HWHM-TDF190/1.5-H31 Installation & Owner's Manual HWHM-TDF300/3.5-H31 Installation & Owner's Manual HWHM-TDF300/3.5E-H31 Installation & Owner's Manual HWHM-TNF190/1.5-H31 Installation & Owner's Manual