Differences

This shows you the differences between two versions of the page.

--- planning:airtight_construction [2015/09/14 17:46] – [Why build an airtight house?] wfeist
+++ planning:airtight_construction [2023/07/18 14:34] (current) – [See also] corinna.geiger@passiv.de
@@ Line 7: / Line 7: @@
 | {{ :picopen:humidity_problem.png }} |\\
-| In winter cool areas, air flows from
+| In winter cool areas, air flows from the inside out cause a moisture problem| \\
- the inside out cause a mositure problem| \\
-\\
-Indoor air has a higher water vapour content (absolute humidity) than outside air - if not dehumidified. In a cold climate, indoor air is cooled during exfiltration flow inside out. The colder air can not keep the high amount of water vapour - condensing will occur at a certain place within the construction. This may lead to serious damage. The process described here is the main reason why external building structure has to be built airtight.
+Indoor air has a higher water vapour content (absolute humidity) than outside air - if not dehumidified. In a cold climate, indoor air is cooled during flow inside-out (called exfiltration). The colder air can not keep the high amount of water vapour - condensing will occur at a certain place within the construction. This may lead to serious damage. In hot and humid climates, there the occupied rooms are going to be cooled, the airflow will be dominated in the direction outside-in (called infiltration) and will cause the same mositure problem. The process described here is the main reason why external building structure has to be built airtight. For the passive house standard, a really good airtightness is required - the airflows discussed here will be negligible, which is one of the big advantages of the standard - without moisture problems, the components can last forever.
 ==== How to make a building airtight ====
@@ Line 18: / Line 16: @@
 |{{ :picopen: airtight_envelope_passive_house.png}}|
-The key to making a building airtight is the principle of a “continuous, tight building envelope“. [[planning:airtight_construction:general_principles:principles_for_improving_airtightness|Read more...]]\\
+The key to making a building airtight is the principle of a “continuous, tight building envelope“. [[planning:airtight_construction:general_principles:principles_for_improving_airtightness|Read more...]]
 \\
@@ Line 24: / Line 22: @@
 Airtightness is an important requirement for any energy-efficient building, **however, it is not the most important one** (as sometimes suggested in popular publications - the most important requirement is good thermal insulation). Example: Passing the [[planning:airtight_construction:general_principles:blower_door_test|blower door test]] is a necessary prerequisite for the functioning passive building; yet it is not sufficient. Example: a conventional aircraft shell is airtight (much more airtight than a Passive House needs to be), but it is not insulated to Passive House quality In aircrafts there is abundant heat available for cabin heating.
+\\
+\\
 ====== See also ======
-[[planning:airtight_construction:general_principles|Airtight envelope - basics]] \\
+Read also in {{:picopen:20190503_навіщо_слід_будувати_герметично_укр.pdf|Ukrainian}} \\
+[[.:airtight_construction:general_principles|Airtight envelope - basics]]
-[[planning:airtight_construction:general_principles:leakage_problems |Leakage problems]] \\
+[[.:airtight_construction:general_principles:leakage_problems|Leakage problems]]
-[[planning:airtight_construction:general_principles:blower_door_test|What is an airtightness test?]] \\
+[[.:airtight_construction:general_principles:blower_door_test|What is an airtightness test]]
-[[planning:airtight_construction:airtightness_measurements_in_Passive_Houses|Carrying out airtightness measurements in Passive Houses]]\\
+[[.:airtight_construction:general_principles:checklist_test_reports_of_airtightness_measurements|]]
-[[planning:airtight_construction:general_principles:principles_for_improving_airtightness|How to make a building airtight]]\\
+Record of an airtightness test: [[:certification:certified_passive_houses:example_documents|]]
-[[planning:airtight_construction:Airtightness of OSB boards|Airtightness of OSB boards]]\\
+[[.:airtight_construction:airtightness_measurements_in_passive_houses|Carrying out airtightness measurements in Passive Houses]]
+[[.:airtight_construction:general_principles:principles_for_improving_airtightness|How to make a building airtight]]
+[[.:airtight_construction:airtightness_of_osb_boards|]] {{:picopen:members_only.png?30}}
+[[.:refurbishment_with_passive_house_components:thermal_envelope:airtightness|Airtightness in existing buildings]]
+[[.:airtight_construction:airtightness_measurement_of_high-rise_buildings_guidelines|]]
-[[planning:refurbishment_with_passive_house_components:thermal_envelope:airtightness|Airtightness in existing buildings]] \\
-\\
 ====== Multimedia ======