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--- planning:building_services:ventilation:facade_integration_of_ventilation_units [2024/10/24 15:02] – [Heat recovery in Core hole] yaling.hsiao@passiv.de
+++ planning:building_services:ventilation:facade_integration_of_ventilation_units [2024/10/30 10:47] (current) – [See also] yaling.hsiao@passiv.de
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 ====== Façade Integration of Ventilation Units for Deep Renovation ======
+Author: Rainer Pfluger
 ===== Facade Integration of Ventilation Unis – Options, Pros and Cons =====
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 If you divide the stack of plates into three packages (a central, wider rectangular cross-section and two identical, narrower cross-sections), you can access around 78.7% of the circular cross-section. This maximum area utilization ration is reached, if the ratio of the width of the large rectangle to the width of the small rectangle is the golden ratio (1 plus the root of five divided by two). The formulas for these dimensions are found to be
-{{ :picopen:ventilation_e_05.png?25 0|}}
+{{ :picopen:ventilation_e_05.png?250 |}}
 In many cases, a standard counter flow heat exchanger is made of a pile of plates, the number of plates pairs are variable and can be ordered by the manufacturer as desired. For the best use of space, the dimensions should be chosen as close as possible to those given by the formulas. The length of the heat exchanger is fixed and consists of the length of the rectangular middle part (countercurrent heat exchanger) and two triangles on its narrow side (usually rectangular). The total length L fitting in the wall with width B in case of a 45° inclined bore hole is
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 [{{ :picopen:ventilation_04.png?600 |Figure 3: Prototype of three heat exchangers combined with the “golden ratio” of the width of the large rectangle to the width of the small rectangle in a tube (45° inclination)}}]
+For economic reasons, the square version might be the best option, as only one heat exchanger is necessary in this case. However – depending on the necessary flow rate – the heat exchanger and consequently the  diameter of the core hole can become quite large. Whether core hole drilling of the respective diameter is permissible for static reasons must be checked on a case-by-case basis.
+===== Summary =====
+Within the outPHit project, several options for façade integrated ventilation systems were investigated and demonstrated by various prototypes. A checklist and a tool will help for planning and quality assurance.
+When planning a renovation, the first thing to decide is where the device can be installed as easily as possible. In addition, the question of whether the outdoor- and exhaust air ducts should be routed outside or inside must be clarified. According to this, the device position next to the window is to be preferred in the context of a complete renovation with ETICS and window replacement, and installation can be simplified and accelerated with the help of prefabricated installation frames. The option of a heat exchanger in the core hole, on the other hand, remains a solution if the ventilation is to be installed after the renovation of the building envelope.
+===== References =====
+**[outPHit WPx ]	**Rainer Pfluger: Multifunctional window element in serial renovation, Innsbruck, 2024 \\
+**[outPHit D4.6]**	Rainer Pfluger: Façade Integration of Devices, 2024 as part of Steiger, J.: outPHit D4.6 Deep Renovation Guidelines, 2024.\\
+**[outPHit Tool D4.6]**	Pfluger, R., Hammes, S.: Devices in the insulation layer, calculation Tool, v1.0, 2024.\\
+----
+{{:picopen:outphit_logo_description.png?400}}{{:picopen:eu_logo_description.png?400}}
+----
+===== See also =====
+[[planning:refurbishment_with_passive_house_components]]
+[[planning:building_services:ventilation]]
+[[https://passipedia.org/eu_projects_publications#outphit_-_deep_retrofits_made_faster_cheaper_and_more_reliable|outPHit - Deep retrofits made faster, cheaper and more reliable]]