Y-shaped portable electric space heater with value to reduce pressure within the boiler

A space heater comprising:

• a housing having angled side walls cooperating with one another in assembled relation to define a generally Y-shaped transverse section with a stem-forming portion at the rear and a plurality of divergent branch portions opening toward the front thereof;
• a unitary die-cast boiler having a plurality of integral heat exchangers mounted, respectively, within said branch portions of said housing;
• a working fluid under subatmospheric pressure within said boiler when at ambient temperature to reduce the boiling point of said working fluid;
• a valve operable for releasing pressure from within said boiler;
• an electric heating element for heating said working fluid within said boiler to a temperature above said boiling point, said heating element being activated to heat said working fluid while said valve is open, and then deactivated with said valve is closed to allow said working fluid to cool, thereby creating said reduced pressure within said boiler;
• and
• a blower for directing ambient air between said heat exchangers in heat exchange relation thereto and through said front openings of said housing.

A space heater comprising:

• a housing having angled side walls cooperating with one another in assembled relation to define a generally Y-shaped transverse section with a stem-forming portion at the rear and a plurality of divergent branch portions opening toward the front thereof;
• a unitary die-cast boiler within said housing having:
• (a) a plurality of integral heat exchanger tubes extending from said boiler into said branch portions of the housing;
• and
• (b) a plurality of integral fins extending between said heat exchanger tubes and occupying a portion of said branch portions of said housing;
• a working fluid under subatmospheric pressure within said boiler when at ambient temperature to reduce the boiling point of said working fluid;
• a valve operable for releasing pressure from within said boiler;
• an electric heating element removably secured within said boiler for heating said working fluid within said boiler to a temperature above said boiling point, said heating element being activated to heat said working fluid while said valve is open, and then deactivated with said valve is closed to allow said working fluid to cool, thereby creating said reduced pressure within said boiler;
• and
• a blower for directing ambient air around said heat exchanger tubes and fins in heat exchange relation thereto and through said front openings of said housing.