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Umwelt | Effizienzhaus in Untergrombach

Blog : Umwelt

Heizen im KfW-70 Effizienzhaus

Heizen im KfW-70 Effizienzhaus

Gestern habe ich zum ersten Mal unsere Heizung im Keller entdeckt. Der Keller war sonst immer verschlossen. Ich habe bisher auch noch keinen Schlüssel dafür erhalten. Der 400 Liter große Solar-Trinkwasserwärmer (HydroComfort SSB 400 B) stand schon seit geraumer Zeit in unserem Wohnzimmer. Nun hat auch dieser den Weg nach unten in den Keller in den HWR gefunden. Bei unserer Heizung handelt es sich um das Modell WBS 14 F von Brötje.

Wie sicherlich jeder weiß haben wir ein KfW70 Haus gekauft. Dazu gehört z.B. auch eine effiziente Gas-Brennwerttherme. Der Effizienzgrad der Heizung beträgt bis zu 109%, da auch die heißen Abgase zum Heizen verwendet werden. Es ist also nicht mehr so wie früher, dass heiße Abgase aus dem Kamin dampfen. In Verbindung mit einer zentralen Lüftungsanlage mit einer Wärmerückgewinnung von 96% der Raumtemperatur hält sich der Gas-Verbrauch in Grenzen. Die Heizung muss sozusagen nur dann nach heizen, wenn die Raumluft durch offenes Fenster oder geöffnete Tür absinkt. Bleiben die Fenster und Türen geschlossen und ist das Haus durchgeheizt, ist der Energieverbrauch minimal. KfW70 sei dank.

Wer wissen möchte wie die Gas-Brennwerttherme genau funktioniert kann sich folgendes Video ansehen:

Alle Leser die die generelle Funktionsweise der Gas-Brennwerttechnik kennenlernen möchten, schauen sich am besten folgendes Video an:

Dadurch, dass wir einen Solar-Trinkwasserwärmer im Keller stehen haben, wird dieser von der Solarthermie mit heißem Wasser versorgt. Im Idealfall passiert das zu 100% von der Sonne. Im Winter und an grauen Tagen muss die Heizung aushelfen. Dadurch lässt sich sehr viel Geld und Energie einsparen. Das kommt dem Geldbeutel und der Umwelt zu Gute. Leider gibt es kein Produktfilm der Firma Brötje dazu. Allerdings wird das genau selbe Prinzip in diesem Video erklärt:

Um noch mehr Energie und Kosten einzusparen, paart man die zwei beschriebenen Techniken also eine effiziente Gas-Brennwerttherme in Verbindung mit der Solarthermie mit einer weiteren effizienten Art der Wärmerückgewinnung. Eine zentrale Lüftungsanlage. Mit Hilfe der zentralen Lüftungsanlage im Haus geht im Winter kaum Energie verloren. Denn die bei uns verbaute Anlage hat eine Wärmerückgewinnung von 96%. Das heißt also im Klartext, dass die warme abgeführte und auch verbrauchte Luft die einströmende Luft vorheizt und das mit einem Effizienzwert von 96%. Bei uns im Haus kommt ein Lüftungssystem von Zehnder  Auch hierfür habe ich mich auf die Suche nach schlauen Videos gemacht. Viel Spaß damit:

 Hier gibt es wieder allgemeine Infos von einem anderen Hersteller zur zentralen Gebäudelüftung:

Teil 1:

Teil 2: