EP0060345A2 - Device in the flue duct of oil or gas fired heating boilers - Google Patents

Device in the flue duct of oil or gas fired heating boilers Download PDF

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Publication number
EP0060345A2
EP0060345A2 EP81110299A EP81110299A EP0060345A2 EP 0060345 A2 EP0060345 A2 EP 0060345A2 EP 81110299 A EP81110299 A EP 81110299A EP 81110299 A EP81110299 A EP 81110299A EP 0060345 A2 EP0060345 A2 EP 0060345A2
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European Patent Office
Prior art keywords
air
duct
exhaust
oil
air duct
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP81110299A
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German (de)
French (fr)
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EP0060345A3 (en
Inventor
Egon Klose
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Buderus AG
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Buderus AG
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Filing date
Publication date
Application filed by Buderus AG filed Critical Buderus AG
Publication of EP0060345A2 publication Critical patent/EP0060345A2/en
Publication of EP0060345A3 publication Critical patent/EP0060345A3/en
Withdrawn legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L11/00—Arrangements of valves or dampers after the fire
    • F23L11/02—Arrangements of valves or dampers after the fire for reducing draught by admission of air to flues

Definitions

  • the invention relates to a device according to the preamble of claim 1.
  • Flue gases from heating boilers should not fall below a certain minimum temperature, around 180 ° C, when entering the chimney. Otherwise, condensate would separate out as a result of further cooling in the chimney. In order to avoid the destruction of brick chimneys, this must be prevented.
  • the prescribed minimum temperature of the exhaust gases must be observed at full load. A deliberately higher temperature would be a waste of energy. At partial load in transition periods, the exhaust gas temperatures are automatically lower. At a partial load of 20%, the exhaust gas temperatures are only around 60 ° C. Thus the dreaded condensate excretion occurs. This can also occur at full load and very high temperature reduction in the boiler.
  • Air admixture to the flue gases from boilers is well known.
  • a device of this type which is known as a draft limiter, can be found, for example, in DE-AS 12 41 028.
  • these draft limiters cannot solve the task presented here. They open precisely when the train is high, i.e. at full boiler with high flue gas temperatures. On the other hand, they close at partial load with low draft and low exhaust gas temperatures.
  • the means provided according to the invention ensure that air is fed into the exhaust gases, especially when the draft and exhaust gas temperature are too low. So far, this was neither planned nor possible.
  • the amount of air added must be so large that no condensate is excreted up to the chimney mouth. This is different in size depending on the chimney design and can be supplied by an air mixing fan arranged in the air duct. In the same sense, a variable narrowing of the flow cross section of the exhaust gas duct also acts before the air duct opens. The air is drawn in by injection, although a higher burner fan pressure must be accepted.
  • the means for admixing the air can be measured by a measuring element, preferably a temperature sensor, in the exhaust gas flow to be controlled.
  • the temperature which is necessary for a dry discharge of the exhaust gases is known to a person skilled in the art or can be determined by tests. If it is set at around 180 C in front of the chimney, it can be determined by a temperature sensor in the exhaust gas duct in front of or behind the mouth of the air duct. It is also possible to set a minimum temperature at the chimney mouth and to place the temperature sensor there.
  • the temperature sensor can then have a regulating effect on the air admixing fan and, if necessary, on a flap in the air duct with the interposition of an electric motor.
  • the required air volume can be adjusted by changing the fan speed, the damper position or the injection cross-section in the exhaust duct.
  • the temperature sensor could also act directly on the individual elements in the form of a bimetal.
  • a boiler 1 with a forced draft burner 2 is assigned the device in the exhaust pipe 4 leading to the chimney 3.
  • the device consists of an exhaust gas duct 6 narrowed to an injector cross section 5 with an adjusting disc to be operated from the outside and an air duct 7 opening behind the injector cross section 5.
  • a flap 8 sits in the air duct 7 is closed at full boiler load and prevents exhaust gases from escaping into the installation room.
  • the flap 8 is controlled by a temperature sensor 9 via an electric motor 10, possibly also via another suitable device, in such a way that the air duct 7 is opened at exhaust gas temperatures below the required minimum value.
  • the effectiveness of the injector cross section 5 is supported by an air blower 11 in the air duct 7.
  • the air supply can only be achieved by the suction effect of the injector cross section 5 or only by the pressure of the air admixture blower 11.
  • an additional safety circuit is also possible during the burner's start-up phase in the case of modulating burner operation.
  • the burner itself runs at partial load due to a low outside temperature, it is controlled by a timer at full load until the cooled chimney is heated up. Subsequently, the switch to partial load with the air admixture according to the invention to the exhaust gases takes place.

Abstract

In heating boilers (1) fired with oil or gas, air should be added to the flue gases to prevent condensate separation in the chimney (3). For this purpose, an air duct (7) is attached to the flue duct (6). Furthermore, means are provided for feeding air into the flue gas stream, namely a constriction (5) of the flue gas duct (6) upstream of the air inlet or an air injection impeller (11) in the air duct (7). In particular, the air injection impeller (11) should be controlled by a temperature sensor (9) in the flue gas stream so that air is added below a specified flue gas temperature. <IMAGE>

Description

Die Erfindung bezieht sich auf eine Vorrichtung nach dem Oberbegriff des Patentanspruches 1.The invention relates to a device according to the preamble of claim 1.

Abgase von Heizkesseln sollten beim Eintritt in den Schornstein eine bestimmte Mindesttemperatur, etwa 180 °C, nicht unterschreiten. Im anderen Falle würde sich infolge einer noch weiteren Abkühlung im Schornstein Kondensat ausscheiden. Um eine Zerstörung von gemauerten Schornsteinen zu vermeiden, muß dieses verhindert werden.Flue gases from heating boilers should not fall below a certain minimum temperature, around 180 ° C, when entering the chimney. Otherwise, condensate would separate out as a result of further cooling in the chimney. In order to avoid the destruction of brick chimneys, this must be prevented.

Bei Heizkesseln mit modulierend in Abhängigkeit von der jeweils benötigten Kesselleistung geregelter Brennstoffmenge ist bei Vollast die vorgeschriebene Mindesttemperatur der Abgase einzuhalten. Eine bewußt höher eingestellte Temperatur würde eine Energieverschwendung darstellen. Bei Teillast in Übergangszeiten ergeben sich dann automatisch niedrigere Abgastemperaturen. Bei einer Teillast von 20% liegen die Abgastemperaturen nur noch bei etwa 60 °C. Somit tritt die gefürchtete Kondensatausscheidung auf. Diese kann auch bei Vollast und sehr hohem Temperaturabbau im Heizkessel auftreten.For boilers with modulating fuel quantity depending on the boiler output required, the prescribed minimum temperature of the exhaust gases must be observed at full load. A deliberately higher temperature would be a waste of energy. At partial load in transition periods, the exhaust gas temperatures are automatically lower. At a partial load of 20%, the exhaust gas temperatures are only around 60 ° C. Thus the dreaded condensate excretion occurs. This can also occur at full load and very high temperature reduction in the boiler.

Das Ausscheiden von Kondensat im Schornstein infolge einer zu niedrigen Abgastemperatur soll verhindert werden.The discharge of condensate in the chimney due to the exhaust gas temperature being too low should be prevented.

Gemäß der Erfindung erfolgt dieses durch eine im Abgaskanal angeordnete Vorrichtung mit den im Kennzeichen des Patentanspruches 1 genannten Merkmalen.According to the invention, this is done by a device arranged in the exhaust duct with the features mentioned in the characterizing part of patent claim 1.

Eine Luftbeimischung zu den Abgasen von Heizkesseln ist altbekannt. Eine Vorrichtung dieser Art, die unter der Bezeichnung Zugbegrenzer bekannt ist, ist beispielsweise der DE-AS 12 41 028 zu entnehmen. Diese Zugbegrenzer können die hier gestellte Aufgabe trotz eines ähnlichen Aufbaues aber nicht lösen. Sie öffnen nämlich gerade bei hohem Zug, d.h. bei Kesselvollast mit hohen Abgastemperaturen. Bei Teillast mit geringem Zug und geringen Abgastemperaturen schließen sie hingegen.Air admixture to the flue gases from boilers is well known. A device of this type, which is known as a draft limiter, can be found, for example, in DE-AS 12 41 028. Despite a similar structure, these draft limiters cannot solve the task presented here. They open precisely when the train is high, i.e. at full boiler with high flue gas temperatures. On the other hand, they close at partial load with low draft and low exhaust gas temperatures.

Im Gegensatz zu den Zugbegrenzern sorgen die erfindungsgemäß vorgesehenen Mittel gerade bei zu niedrigem Zug und zu niedriger Abgastemperatur für ein Einspeisen von Luft in die Abgase. Das war bisher weder geplant noch möglich.In contrast to the draft limiters, the means provided according to the invention ensure that air is fed into the exhaust gases, especially when the draft and exhaust gas temperature are too low. So far, this was neither planned nor possible.

Die Menge der beigemischten Luft muß so groß sein, daß bis zur Schornsteinmündung kein Kondensat ausgeschieden wird. Diese ist je nach Schornsteinausbildung unterschiedlich groß und kann durch ein im Luftkanal angeordnetes Luftbeimischgebläse zugeführt werden. Im gleichen Sinne wirkt auch eine variable Verengung des Strömungsquerschnittes des Abgaskanales vor der Einmündung des Luftkanales. Durch Injektion wird die Luft angesaugt, wobei allerdings eine höhere Brennergebläsepressung in Kauf zu nehmen ist.The amount of air added must be so large that no condensate is excreted up to the chimney mouth. This is different in size depending on the chimney design and can be supplied by an air mixing fan arranged in the air duct. In the same sense, a variable narrowing of the flow cross section of the exhaust gas duct also acts before the air duct opens. The air is drawn in by injection, although a higher burner fan pressure must be accepted.

Durch ein Meßorgan, vorzugsweise ein Temperaturfühler, im Abgasstrom können die Mittel zur Beimischung der Luft gesteuert werden. Die Temperatur, die für eine trockene Ableitung der Abgase notwendig ist, ist einem Fachmann bekannt bzw. durch Versuche zu ermitteln. Bei einer Festlegung auf etwa 180 C vor dem Schornstein kann sie durch einen Temperaturfühler im Abgaskanal vor oder hinter der Einmündung des Luftkanales ermittelt werden. Es ist auch möglich, eine Mindesttemperatur an der Schornsteinmündung festzulegen und den Temperaturfühler dort anzuordnen. Der Temperaturfühler kann dann unter Zwischenschaltung eines Elektromotores regulierend auf das Luftbeimischgebläse und ggfs. auf eine Klappe im Luftkanal einwirken. Durch eine Veränderung der Gebläsedrehzahl, der Klappenstellung oder auch des Injektionsquerschnittes im Abgaskanal kann die benötigte Luftmenge eingestellt werden. Der Temperaturfühler könnte auch in Form eines Bimetalles unmittelbar auf die einzelnen Elemente einwirken.The means for admixing the air can be measured by a measuring element, preferably a temperature sensor, in the exhaust gas flow to be controlled. The temperature which is necessary for a dry discharge of the exhaust gases is known to a person skilled in the art or can be determined by tests. If it is set at around 180 C in front of the chimney, it can be determined by a temperature sensor in the exhaust gas duct in front of or behind the mouth of the air duct. It is also possible to set a minimum temperature at the chimney mouth and to place the temperature sensor there. The temperature sensor can then have a regulating effect on the air admixing fan and, if necessary, on a flap in the air duct with the interposition of an electric motor. The required air volume can be adjusted by changing the fan speed, the damper position or the injection cross-section in the exhaust duct. The temperature sensor could also act directly on the individual elements in the form of a bimetal.

Die beigefügte Zeichnung stellt ein Ausführungsbeispiel der Erfindung dar. Es zeigt:

  • Fig. 1 : Einen Heizkessel in der Seitenansicht mit einer nachgeschalteten Vorrichtung im Längsschnitt und
  • Fig. 2 und Fig. 3 : Je einen Längsschnitt durch speziell gestaltete Vorrichtungen zur Luftbeimischung.
The accompanying drawing shows an embodiment of the invention. It shows:
  • Fig. 1: A boiler in side view with a downstream device in longitudinal section and
  • 2 and 3: A longitudinal section through specially designed devices for admixing air.

Einem Heizkessel 1 mit einem Gebläsebrenner 2 ist die zum Schornstein 3 führende Vorrichtung im Abgasrohr 4 zugeordnet. Die Vorrichtung besteht aus einem zu einem Injektorquerschnitt 5 verengten Abgaskanal 6 mit einer von außen zu bedienenden Verstellscheibe und einem hinter dem Injektorquerschnitt 5 einmündenden Luftkanal 7 . Im Luftkanal 7 sitzt eine Klappe 8 , die bei Kesselvollast geschlossen ist und einen Austritt von Abgasen in den Aufstellungsraum verhindert. Die Klappe 8 wird von einem Temperaturfühler 9 über einen Elektromotor 10 , ggfs. auch über eine andere geeignete Einrichtung, so gesteuert, daß der Luftkanal 7 bei Abgastemperaturen unter dem geforderten Mindestwert geöffnet wird. Die Wirksamkeit des Injektorquerschnittes 5 wird durch ein Luftbeimischgebläse 11 im Luftkanal 7 unterstützt. Es ist auch möglich, nur das Luftbeimischgebläse 11 zu betätigen, wodurch eine pendelnde Klappe automatisch geöffnet wird. Grundsätzlich kann die Luftzufuhr nur durch die Sogwirkung des Injektorquerschnittes 5 oder nur durch den Druck des Luftbeimischgebläses 11 erzielt werden.A boiler 1 with a forced draft burner 2 is assigned the device in the exhaust pipe 4 leading to the chimney 3. The device consists of an exhaust gas duct 6 narrowed to an injector cross section 5 with an adjusting disc to be operated from the outside and an air duct 7 opening behind the injector cross section 5. A flap 8 sits in the air duct 7 is closed at full boiler load and prevents exhaust gases from escaping into the installation room. The flap 8 is controlled by a temperature sensor 9 via an electric motor 10, possibly also via another suitable device, in such a way that the air duct 7 is opened at exhaust gas temperatures below the required minimum value. The effectiveness of the injector cross section 5 is supported by an air blower 11 in the air duct 7. It is also possible to actuate only the air admixture blower 11, whereby a swinging flap is opened automatically. In principle, the air supply can only be achieved by the suction effect of the injector cross section 5 or only by the pressure of the air admixture blower 11.

Außer der beschriebenen und dargestellten Luftbeimischung zur Verhinderung der Kondensatausscheidung aus den Abgasen ist bei modulierendem Brennerbetrieb noch eine zusätzliche Sicherheitsschaltung während der Anfahrphase des Brenners möglich. In Zeiten, in denen der Brenner infolge einer geringen Außentemperatur an sich mit Teillast fährt, wird er durch ein Zeitglied gesteuert zunächst so lange mit Vollast gefahren, bis der ausgekühlte Schornstein aufgeheizt ist. Anschließend erfolgt die Umschaltung auf Teillast mit der erfindungsgemäßen Luftbeimischung zu den Abgasen.In addition to the described and illustrated air admixture to prevent the condensate from the exhaust gases, an additional safety circuit is also possible during the burner's start-up phase in the case of modulating burner operation. In times in which the burner itself runs at partial load due to a low outside temperature, it is controlled by a timer at full load until the cooled chimney is heated up. Subsequently, the switch to partial load with the air admixture according to the invention to the exhaust gases takes place.

Claims (7)

1. Vorrichtung im Abgaskanal von öl- oder gasbefeuerten Heizkesseln zum Verhindern von Kondensatausscheidungen aus den Abgasen,
gekennzeichnet durch einen in den Abgaskanal (6) mündenden Luftkanal (7)
und durch Mittel zum Einspeisen von Luft in den Abgasstrom bei Unterschreiten der für die trockene Ableitung der Abgase notwendigen Temperatur.1. device in the exhaust duct of oil or gas-fired boilers to prevent condensate from the exhaust gases,
characterized by an air duct (7) opening into the exhaust duct (6)
and by means for feeding air into the exhaust gas flow when the temperature required for the dry discharge of the exhaust gases is not reached. 2. Vorrichtung nach Anspruch 1, gekennzeichnet durch eine Verengung (5) des Abgaskanales (6) vor der Einmündung des Luftkanales (7) zur Erzeugung eines Injektionsstromes als Mittel zum Einspeisen der Luft in den Abgasstrom.2. Device according to claim 1, characterized by a constriction (5) of the exhaust duct (6) before the confluence of the air duct (7) for generating an injection stream as a means for feeding the air into the exhaust stream. 3. Vorrichtung nach Anspruch 1, gekennzeichnet durch ein Luftbeimischgebläse (11) im Luftkanal (7) als Mittel zum Einspeisen der Luft in den Abgasstrom.3. Apparatus according to claim 1, characterized by an air admixing fan (11) in the air duct (7) as a means for feeding the air into the exhaust gas stream. 4. Vorrichtung nach den Ansprüchen 1 bis 3, dadurch gekennzeichnet, daß ein Meßorgan im Abgasstrom unter Zwischenschalten eines Elektromotores (10) regulierend auf das zusätzliche Luftbeimischgebläse (11) und/oder eine Klappe (8) im Luftkanal (7) einwirkt.4. Device according to claims 1 to 3, characterized in that a measuring element in the exhaust gas flow with the interposition of an electric motor (10) acts regulatingly on the additional air blower (11) and / or a flap (8) in the air duct (7). 5. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß das Meßorgan in Form eines Temperaturfühlers (9) im Abgaskanal (6) angeordnet ist.5. The device according to claim 4, characterized in that the measuring element is arranged in the form of a temperature sensor (9) in the exhaust duct (6). 6. Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, daß der Temperaturfühler (9) in Form eines Bimetalls direkt auf das Luftbeimischgebläse (11) und/oder eine Klappe (8) im Luftkanal (7) einwirkt.6. The device according to claim 5, characterized in that the temperature sensor (9) acts in the form of a bimetal directly on the air admixture blower (11) and / or a flap (8) in the air duct (7). 7. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß das Meßorgan an der Mündung des Schornsteins (3) angeordnet ist.7. The device according to claim 4, characterized in that the measuring element is arranged at the mouth of the chimney (3).
EP81110299A 1981-03-17 1981-12-10 Device in the flue duct of oil or gas fired heating boilers Withdrawn EP0060345A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19813110306 DE3110306A1 (en) 1981-03-17 1981-03-17 DEVICE IN THE EXHAUST CHANNEL OF OIL OR GAS-FIRED BOILERS
DE3110306 1981-03-17

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EP0060345A2 true EP0060345A2 (en) 1982-09-22
EP0060345A3 EP0060345A3 (en) 1983-02-02

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EP81110299A Withdrawn EP0060345A3 (en) 1981-03-17 1981-12-10 Device in the flue duct of oil or gas fired heating boilers

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1988001198A2 (en) * 1986-08-16 1988-02-25 Neumann Siegmar R Process and device for optimising energy output in heating installations, reducing the pollutants generated and cleaning flue gases
US4920866A (en) * 1988-05-12 1990-05-01 Michael Hoban Anti back draft device for flue
DE4109576A1 (en) * 1990-03-23 1991-09-26 Nuovo Pignone Spa ON THE WALL MOUNTABLE GAS BOILER WITH BLOWER, CLOSED TO THE ROOM
GB2275099A (en) * 1993-01-23 1994-08-17 Jonathan Leslie Greenall Heating assemblies having a chimney
AT402232B (en) * 1993-10-14 1997-03-25 Vaillant Gmbh CHIMNEY CONNECTION
NL1002536C2 (en) * 1996-03-05 1997-09-08 Radson Alutherm Nv Exhaust pipe for connecting a central heating appliance to an open chimney.
GB2329856B (en) * 1996-06-20 2000-11-15 Boon Pen Chua Air extraction apparatus
NL1016049C2 (en) * 2000-08-30 2002-03-01 Gastec Nv Device for connecting exhaust gases from a gas consumption appliance and a ventilation system with or without connection to a heat-recovery unit.
FR2884297A1 (en) * 2005-04-06 2006-10-13 Conseils Etudes Et Recherches En Gestion De Lair Cerga Air outlet for fossil fuel boiler, has lateral peripheral wall comprising lateral outlet connected to ventilation network by utilizing secondary exhaust duct, where duct permits evacuation of flow of ambient air towards network
DE19729716B4 (en) * 1996-12-18 2006-10-26 Robert Bosch Gmbh Method of operating a boiler

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3302407A1 (en) * 1983-01-22 1984-07-26 Joh. Vaillant Gmbh U. Co, 5630 Remscheid Regulating device
DE3345202A1 (en) * 1983-12-14 1985-06-20 Franklin 8901 Kissing Schmidt Apparatus for the reduction of the dew point temperature of exhaust gases
HU200226B (en) * 1987-11-23 1990-04-28 Borsod Abauj Zemplen Megyei Ta Method and apparatus for securing condensationless operating state of gas flue offtake systems

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR686569A (en) * 1929-12-13 1930-07-28 Heat storage and ventilation device applicable in flue gas ducts
DE1940680A1 (en) * 1969-08-09 1971-03-04 Hermann Hoenlinger Method and device for preventing sooting of chimneys
DE2101495A1 (en) * 1971-01-14 1972-07-27 Bieling F A control system for chimney shaft ventilation for better smoke evacuation and prevention of oxide gas poisoning
DE2235386A1 (en) * 1972-07-19 1974-02-07 Aloys Huebenthal DRAFT AIR MIXER
DE2348012A1 (en) * 1973-09-24 1975-04-03 Kutzner Luitpold MOTOR-ADJUSTABLE BUTTERFLY FLAPS FOR GAS FIREPLACES

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Publication number Priority date Publication date Assignee Title
DE2500C (en) * G. KOBLINSKY in Berlin Improved curtain roll
GB1196113A (en) * 1966-07-21 1970-06-24 Richard Ernest Abraha Jennings Improvements in or relating to Chimneys for Fuel Burning Heaters
AT306215B (en) * 1971-06-24 1973-03-26 Franz Bieling Built-in element in the manner of a built-in block for chimney chimneys
FR2144119A5 (en) * 1971-07-01 1973-02-09 Etu Rech Ventilation

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR686569A (en) * 1929-12-13 1930-07-28 Heat storage and ventilation device applicable in flue gas ducts
DE1940680A1 (en) * 1969-08-09 1971-03-04 Hermann Hoenlinger Method and device for preventing sooting of chimneys
DE2101495A1 (en) * 1971-01-14 1972-07-27 Bieling F A control system for chimney shaft ventilation for better smoke evacuation and prevention of oxide gas poisoning
DE2235386A1 (en) * 1972-07-19 1974-02-07 Aloys Huebenthal DRAFT AIR MIXER
DE2348012A1 (en) * 1973-09-24 1975-04-03 Kutzner Luitpold MOTOR-ADJUSTABLE BUTTERFLY FLAPS FOR GAS FIREPLACES

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1988001198A2 (en) * 1986-08-16 1988-02-25 Neumann Siegmar R Process and device for optimising energy output in heating installations, reducing the pollutants generated and cleaning flue gases
WO1988001198A3 (en) * 1986-08-16 1988-05-19 Siegmar R Neumann Process and device for optimising energy output in heating installations, reducing the pollutants generated and cleaning flue gases
US4920866A (en) * 1988-05-12 1990-05-01 Michael Hoban Anti back draft device for flue
DE4109576A1 (en) * 1990-03-23 1991-09-26 Nuovo Pignone Spa ON THE WALL MOUNTABLE GAS BOILER WITH BLOWER, CLOSED TO THE ROOM
GB2275099A (en) * 1993-01-23 1994-08-17 Jonathan Leslie Greenall Heating assemblies having a chimney
GB2275099B (en) * 1993-01-23 1996-08-28 Jonathan Leslie Greenall Heating assemblies having a chimney
AT402232B (en) * 1993-10-14 1997-03-25 Vaillant Gmbh CHIMNEY CONNECTION
NL1002536C2 (en) * 1996-03-05 1997-09-08 Radson Alutherm Nv Exhaust pipe for connecting a central heating appliance to an open chimney.
EP0794385A1 (en) * 1996-03-05 1997-09-10 N.V. Radson-Alutherm Exhaust piece for connecting a central heating apparatus to an open stack
GB2329856B (en) * 1996-06-20 2000-11-15 Boon Pen Chua Air extraction apparatus
US6331141B1 (en) 1996-06-20 2001-12-18 Boon Pen Chua Fluid extraction apparatus
DE19729716B4 (en) * 1996-12-18 2006-10-26 Robert Bosch Gmbh Method of operating a boiler
NL1016049C2 (en) * 2000-08-30 2002-03-01 Gastec Nv Device for connecting exhaust gases from a gas consumption appliance and a ventilation system with or without connection to a heat-recovery unit.
EP1184624A1 (en) * 2000-08-30 2002-03-06 Gastec N.V. Device for merging exhaust gasses of a gas heater and a ventilation system with or without connection to a heat recovery unit
FR2884297A1 (en) * 2005-04-06 2006-10-13 Conseils Etudes Et Recherches En Gestion De Lair Cerga Air outlet for fossil fuel boiler, has lateral peripheral wall comprising lateral outlet connected to ventilation network by utilizing secondary exhaust duct, where duct permits evacuation of flow of ambient air towards network

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Publication number Publication date
EP0060345A3 (en) 1983-02-02
DE3110306A1 (en) 1982-09-30

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