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(de )
1991-11-21
Ventilanordnung.
GB864859A
(https= )
US2488388A
(en )
1949-11-15
Fuel and damper control combination
US1990778A
(en )
1935-02-12
Automatic air-draft regulator
GB956764A
(en )
1964-04-29
Improvements in suction cleaners
US4315730A
(en )
1982-02-16
Burner control system
GB1235891A
(en )
1971-06-16
Improvements in or relating to gas heaters
US4834282A
(en )
1989-05-30
Device for use with flue dampers
US2296410A
(en )
1942-09-22
Draft control for combustion heating systems
US4320739A
(en )
1982-03-23
Combustion type heater
US2827026A
(en )
1958-03-18
Means for cooling internal combustion engines
US2189511A
(en )
1940-02-06
Diaphragm damper control for stokers
US2979265A
(en )
1961-04-11
Room ventilating method and apparatus
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(en )
1960-01-12
Fluid controller and method
US1972766A
(en )
1934-09-04
Heating, ventilating, and air conditioning apparatus
GB704319A
(en )
1954-02-17
Improvements relating to ventilating installations for vehicles
US2584326A
(en )
1952-02-05
Stack draft booster and control device for combustion apparatus
US2604090A
(en )
1952-07-22
Sheetsxsheet i
GB797453A
(en )
1958-07-02
Improvements in draught stabilizers
US1510475A
(en )
1924-10-07
Heating apparatus
US2149934A
(en )
1939-03-07
Air flow control for underfeed stokers
US2561106A
(en )
1951-07-17
Fuel feeding control means responsive to air blower pressure
US1474754A
(en )
1923-11-20
Combustion-controlling system
US4480630A
(en )
1984-11-06
Jacketed combustion type heater with blowback prevention feature
US2479069A
(en )
1949-08-16
Heating system