CH71294A
(en )
1915-12-16
Electric heating and heat accumulation process using hot water heating
CH69901A
(en )
1915-08-02
Electric hot water heating with heat storage
FR521103A
(en )
1921-07-07
Hot water and steam heating system
DK23495C
(en )
1918-09-09
Hot water heating system with heat collector.
CH73173A
(en )
1916-09-01
Hot water tank with electric heating
CH76897A
(en )
1918-07-16
Electric hot water central heating
CH51607A
(en )
1911-09-16
Hot water boiler with indirect heating
FR463534A
(en )
1914-02-25
New heating radiators
CH70999A
(en )
1915-11-16
Hot water heating system
CH51067A
(en )
1911-07-17
Hot water radiator with multiple heating elements and an electric heater
CH55164A
(en )
1912-07-16
Hot water radiator with electrical heat generator
FR467170A
(en )
1914-06-05
Hot water heater
FI6111A
(en )
1915-07-29
Construction set for radiators for central heating in the case of thermal insulation
FR531469A
(en )
1922-01-14
electric heating element for radiators and heaters
FR517848A
(en )
1921-05-12
Electric water heater, rapid heating
CH64659A
(en )
1914-04-16
Electrically heated hot water bottle
AU1554515B
(en )
1916-02-29
Improvements in and relating to hot water heating apparatus
CH57444A
(en )
1913-01-02
Hot water heating system with circulation pump
CH73666A
(en )
1916-11-01
Heat accumulator for hot water heating
FR496284A
(en )
1919-10-31
Central heating boiler heaters
CH66069A
(en )
1914-10-01
Heating device for hot water heating with electrically heated heating resistors
CA165836A
(en )
1915-11-02
Hot water heater
FR490077A
(en )
1919-04-01
Catelle stove for electric heating
DK21950C
(en )
1917-02-26
Hot water heater.
CH80630A
(en )
1919-04-01
Catelle stove for electric heating