Ventilation - Revision history

Tilmann at 19:30, 9 February 2026

2026-02-09T19:30:17Z

← Older revision		Revision as of 21:30, 9 February 2026
Line 1:		Line 1:
	🎐 Kanthaus has a [https://en.wikipedia.org/wiki/Heat_recovery_ventilation central heat-recovery ventilation system], consisting of a [https://shop.systemair.com/de-DE/save--vtc--700--l--wrg--geraet/p609989 Systemair SAVE VTC 700] ventilation unit in the K22 attic and an extended system of pipes in valves to ~~the majority of the~~ rooms.		🎐 Kanthaus has a [https://en.wikipedia.org/wiki/Heat_recovery_ventilation central heat-recovery ventilation system], consisting of a [https://shop.systemair.com/de-DE/save--vtc--700--l--wrg--geraet/p609989 Systemair SAVE VTC 700] ventilation unit in the K22 attic and an extended system of pipes and valves to many rooms in K20 and K22.

	The ventilation unit supplies fresh air to the house, slightly warmed by the stale air it extracts from the house. Both air flows do not mix, they just transfer the heat inside the heat exchanger.		The ventilation unit supplies fresh air to the house, slightly warmed by the stale air it extracts from the house. Both air flows do not mix, they just transfer the heat inside the heat exchanger.

Tilmann: /* Central filters in the attic */

2026-02-09T19:27:18Z

Central filters in the attic

← Older revision		Revision as of 21:27, 9 February 2026
Line 43:		Line 43:

	First, buy a new fitting F7 filter, like those:		First, buy a new fitting F7 filter, like those:
			* https://cleanfilter-shop.de/save-vtr-700-vtc-700-f7-m5-filterset
			* https://www.rado-airshop.de/5x-ersatz-kompaktfilter-systemair-save-vtc-700-save-vtr-700-f7/S0006.1393/
	* https://www.as-luftfilter.de/Ersatzflter-Lueftungsgeraete/Systemair/VTC-700/Ersatzfilter-passend-fuer-Systemair-VTC-700---Gueteklasse-F7.html		* https://www.as-luftfilter.de/Ersatzflter-Lueftungsgeraete/Systemair/VTC-700/Ersatzfilter-passend-fuer-Systemair-VTC-700---Gueteklasse-F7.html
	* https://rt-handel.de/Ersatzfilter-Lueftung/Systemair/VTC-700/Ersatzfilter-passend-fuer-Systemair-VTC-700-Filterklasse-F7		* https://rt-handel.de/Ersatzfilter-Lueftung/Systemair/VTC-700/Ersatzfilter-passend-fuer-Systemair-VTC-700-Filterklasse-F7

	Then turn off the ventilation device, open the main cover and unscrew the left panel. Slide out the old filter and take a picture to show it to interested people ;) Insert the new filter, carefully screw the panel on, close the main cover and turn on ventilation again.		Then turn off the ventilation device, open the main cover and unscrew the left panel. Slide out the old filter and take a picture to show it to interested people ;) Insert the new filter, carefully screw the panel on, close the main cover and turn on ventilation again.

			A note about replacement filters: they seem to vary a lot in terms of filter surface, that means how often it is folded. The original Systemair filter seems to have almost double the folds compared to the ones from "Cleanfilter-Shop". "AS-Luftfilter" were somewhere in the middle.
			More surface means the filter needs less fan power to get the same air flow. Which also means that they can stay longer inside the device.
			We didn't measure pressure differences across filters yet.

	=== Wash heat exchanger ===		=== Wash heat exchanger ===

Tilmann: /* Central filters in the attic */

2025-02-27T05:57:21Z

Central filters in the attic

← Older revision		Revision as of 07:57, 27 February 2025
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	The used air filter doesn’t need to replaced regularly, as we have to filters on the intakes in the room (see section above).		The used air filter doesn’t need to replaced regularly, as we have to filters on the intakes in the room (see section above).

	First, buy a new fitting F7 filter, like those: - https://www.as-luftfilter.de/Ersatzflter-Lueftungsgeraete/Systemair/VTC-700/Ersatzfilter-passend-fuer-Systemair-VTC-~~700—Gueteklasse~~-F7.html - https://rt-handel.de/Ersatzfilter-Lueftung/Systemair/VTC-700/Ersatzfilter-passend-fuer-Systemair-VTC-700-Filterklasse-F7		First, buy a new fitting F7 filter, like those:
			* https://www.as-luftfilter.de/Ersatzflter-Lueftungsgeraete/Systemair/VTC-700/Ersatzfilter-passend-fuer-Systemair-VTC-700---Gueteklasse-F7.html
			* https://rt-handel.de/Ersatzfilter-Lueftung/Systemair/VTC-700/Ersatzfilter-passend-fuer-Systemair-VTC-700-Filterklasse-F7

	Then turn off the ventilation device, open the main cover and unscrew the left panel. Slide out the old filter and take a picture to show it to interested people ;) Insert the new filter, carefully screw the panel on, close the main cover and turn on ventilation again.		Then turn off the ventilation device, open the main cover and unscrew the left panel. Slide out the old filter and take a picture to show it to interested people ;) Insert the new filter, carefully screw the panel on, close the main cover and turn on ventilation again.

Tilmann at 05:54, 27 February 2025

2025-02-27T05:54:13Z

← Older revision		Revision as of 07:54, 27 February 2025
Line 28:		Line 28:
	They are located in all rooms where air is sucked into the pipe, to prevent the pipe from getting dirty. Especially when radiators are running, a lot of dust is kicked up in the air and ends in the filters.		They are located in all rooms where air is sucked into the pipe, to prevent the pipe from getting dirty. Especially when radiators are running, a lot of dust is kicked up in the air and ends in the filters.

	To check if a change is necessary, measure the air flow into the intake with an air flow meter (currently in K22-~~1-1~~). It doesn’t hurt to replace the filters more often.		To check if a change is necessary, measure the air flow into the intake with an air flow meter (currently in K22-4). It doesn’t hurt to replace the filters more often.

	You can take the filters out by simply pulling out the valve.		You can take the filters out by simply pulling out the valve.

	Fresh filters are in a box, currently in the ~~Ex-food-storage~~ (K22-~~1-1~~) ~~as of 2023-02-23~~. Put the new filter on the outside of the pipe and insert the valve again. It’s a bit tricky to prevent the filter from getting pushed too far into the pipe.		Fresh filters are in a box, currently in the Spitzboden (K22-4). Put the new filter on the outside of the pipe and insert the valve again. It’s a bit tricky to prevent the filter from getting pushed too far into the pipe.

	You can wash the filters with a lot of water and dry them. Then they can be reused a few times, until holes appear.		You can wash the filters with a lot of water and dry them. Then they can be reused a few times, until holes appear.

Tilmann at 05:52, 27 February 2025

2025-02-27T05:52:40Z

← Older revision		Revision as of 07:52, 27 February 2025
Line 7:		Line 7:
	== Air flow schema ==		== Air flow schema ==
	[[File:Ventilation-plan.png\|thumb]]		[[File:Ventilation-plan.png\|thumb]]
	There are exceptions between floors: - [[Silent office\|Silent Office]] has supply instead of intake - K22-0 just has one intake in the [[Freeshop storage\|Free Shop Storage]], but no supply - it pulls fresh air from the hallway and through the [[Freeshop lounge\|Free Shop Lounge]]		There are exceptions between floors:

			* [[Silent office\|Silent Office]] has supply instead of intake
			* K22-0 just has one intake in the [[Freeshop storage\|Free Shop Storage]], but no supply - it pulls fresh air from the hallway and through the [[Freeshop lounge\|Free Shop Lounge]]

	Also, ventilation piping is work-in-progress and will be extended as the house evolves.		Also, ventilation piping is work-in-progress and will be extended as the house evolves.

Janina at 08:57, 29 January 2025

2025-01-29T08:57:12Z

← Older revision		Revision as of 10:57, 29 January 2025
Line 1:		Line 1:
	🎐 Kanthaus has a [https://en.wikipedia.org/wiki/Heat_recovery_ventilation central heat-recovery ventilation system], consisting of a [https://shop.systemair.com/de-DE/save--vtc--700--l--wrg--geraet/p609989 Systemair SAVE VTC 700] ventilation unit in the K22 attic and an extended system of pipes in valves to the majority of the rooms.		🎐 Kanthaus has a [https://en.wikipedia.org/wiki/Heat_recovery_ventilation central heat-recovery ventilation system], consisting of a [https://shop.systemair.com/de-DE/save--vtc--700--l--wrg--geraet/p609989 Systemair SAVE VTC 700] ventilation unit in the K22 attic and an extended system of pipes in valves to the majority of the rooms.

	The ventilation unit supplies fresh air to the house, ~~pre-~~warmed by the stale air it extracts from the house. Both air flows do not mix, they just transfer the heat inside the heat-exchanger.		The ventilation unit supplies fresh air to the house, slightly warmed by the stale air it extracts from the house. Both air flows do not mix, they just transfer the heat inside the heat exchanger.

	The system automatically adjusts the fan speed to maintain a consistent relative indoor humidity, thereby saving electric power.		The system automatically adjusts the fan speed to maintain a consistent relative indoor humidity, thereby saving electric power.
Line 46:		Line 46:

	We didn’t do this so far, but the heat-exchanger can be rinsed with water to get rid of fine dust. This should increase its efficiency.		We didn’t do this so far, but the heat-exchanger can be rinsed with water to get rid of fine dust. This should increase its efficiency.
			[[Category:Technical]]
			[[Category:Repro]]

Worldsdweller: Emoji preservation efforts.

2024-10-18T14:13:47Z

Emoji preservation efforts.

← Older revision		Revision as of 16:13, 18 October 2024
Line 1:		Line 1:
	~~<nowiki>:</nowiki>wind_chime:~~ Kanthaus has a [https://en.wikipedia.org/wiki/Heat_recovery_ventilation central heat-recovery ventilation system], consisting of a [https://shop.systemair.com/de-DE/save--vtc--700--l--wrg--geraet/p609989 Systemair SAVE VTC 700] ventilation unit in the K22 attic and an extended system of pipes in valves to the majority of the rooms.		🎐 Kanthaus has a [https://en.wikipedia.org/wiki/Heat_recovery_ventilation central heat-recovery ventilation system], consisting of a [https://shop.systemair.com/de-DE/save--vtc--700--l--wrg--geraet/p609989 Systemair SAVE VTC 700] ventilation unit in the K22 attic and an extended system of pipes in valves to the majority of the rooms.

	The ventilation unit supplies fresh air to the house, pre-warmed by the stale air it extracts from the house. Both air flows do not mix, they just transfer the heat inside the heat-exchanger.		The ventilation unit supplies fresh air to the house, pre-warmed by the stale air it extracts from the house. Both air flows do not mix, they just transfer the heat inside the heat-exchanger.

Worldsdweller: Fixed remaining insubordinate red links.

2024-10-17T10:04:58Z

Fixed remaining insubordinate red links.

← Older revision		Revision as of 12:04, 17 October 2024
Line 7:		Line 7:
	== Air flow schema ==		== Air flow schema ==
	[[File:Ventilation-plan.png\|thumb]]		[[File:Ventilation-plan.png\|thumb]]
	There are exceptions between floors: - [[~~Silentoffice~~\|Silent Office]] has supply instead of intake - K22-0 just has one intake in the [[~~Freeshopstorage~~\|Free Shop Storage]], but no supply - it pulls fresh air from the hallway and through the [[~~Freeshoplounge~~\|Free Shop Lounge]]		There are exceptions between floors: - [[Silent office\|Silent Office]] has supply instead of intake - K22-0 just has one intake in the [[Freeshop storage\|Free Shop Storage]], but no supply - it pulls fresh air from the hallway and through the [[Freeshop lounge\|Free Shop Lounge]]

	Also, ventilation piping is work-in-progress and will be extended as the house evolves.		Also, ventilation piping is work-in-progress and will be extended as the house evolves.

Doug: Post-migration cleanup

2024-10-16T08:55:53Z

Post-migration cleanup

← Older revision		Revision as of 10:55, 16 October 2024
Line 1:		Line 1:
	= :wind_chime: ~~Ventilation =~~		<nowiki>:</nowiki>wind_chime: Kanthaus has a [https://en.wikipedia.org/wiki/Heat_recovery_ventilation central heat-recovery ventilation system], consisting of a [https://shop.systemair.com/de-DE/save--vtc--700--l--wrg--geraet/p609989 Systemair SAVE VTC 700] ventilation unit in the K22 attic and an extended system of pipes in valves to the majority of the rooms.

	Kanthaus has a [https://en.wikipedia.org/wiki/Heat_recovery_ventilation central heat-recovery ventilation system], consisting of a [https://shop.systemair.com/de-DE/save--vtc--700--l--wrg--geraet/p609989 Systemair SAVE VTC 700] ventilation unit in the K22 attic and an extended system of pipes in valves to the majority of the rooms.		The ventilation unit supplies fresh air to the house, pre-warmed by the stale air it extracts from the house. Both air flows do not mix, they just transfer the heat inside the heat-exchanger.

	The ventilation unit supplies fresh air to the house, pre-warmed by the stale air it extracts from the house. Both air flows do not mix, they just transfer the heat inside the heat exchanger.

	The system automatically adjusts the fan speed to maintain a consistent relative indoor humidity, thereby saving electric power.		The system automatically adjusts the fan speed to maintain a consistent relative indoor humidity, thereby saving electric power.

	== Air flow schema ==		== Air flow schema ==
			[[File:Ventilation-plan.png\|thumb]]
	[[File:~~/images/ventilation~~-plan.png]]		There are exceptions between floors: - [[Silentoffice\|Silent Office]] has supply instead of intake - K22-0 just has one intake in the [[Freeshopstorage\|Free Shop Storage]], but no supply - it pulls fresh air from the hallway and through the [[Freeshoplounge\|Free Shop Lounge]]

	There are exceptions between floors: - [[~~rooms/silentoffice.md~~\|Silent Office]] has supply instead of intake - K22-0 just has one intake in the [[~~rooms/freeshopstorage.md~~\|Free Shop Storage]], but no supply - it pulls fresh air from the hallway and through the [[~~rooms/freeshoplounge.md~~\|Free Shop Lounge]]

	Also, ventilation piping is work-in-progress and will be extended as the house evolves.		Also, ventilation piping is work-in-progress and will be extended as the house evolves.
Line 17:		Line 13:
	== Statistics ==		== Statistics ==

	You can get some statistics about the ventilation system in [[~~../digital/grafana.html\|~~Grafana]]. Those statistics are pulled from the ventilation unit via [https://git.kanthaus.online/kanthaus/ventilation-watcher an ESP32 device communicating with it via Modbus].		You can get some statistics about the ventilation system in [[Grafana]]. Those statistics are pulled from the ventilation unit via [https://git.kanthaus.online/kanthaus/ventilation-watcher an ESP32 device communicating with it via Modbus].

	== Maintenance ==		== Maintenance ==
Line 49:		Line 45:
	=== Wash heat exchanger ===		=== Wash heat exchanger ===

	We didn’t do this so far, but the heat exchanger can be rinsed with water to get rid of fine dust. This should increase its efficiency.		We didn’t do this so far, but the heat-exchanger can be rinsed with water to get rid of fine dust. This should increase its efficiency.

HandbookMigration2024: "migration of handbook pages from https://git.kanthaus.online/kanthaus/handbook"

2024-10-15T10:56:27Z

"migration of handbook pages from https://git.kanthaus.online/kanthaus/handbook"

New page

= :wind_chime: Ventilation =

Kanthaus has a [https://en.wikipedia.org/wiki/Heat_recovery_ventilation central heat-recovery ventilation system], consisting of a [https://shop.systemair.com/de-DE/save--vtc--700--l--wrg--geraet/p609989 Systemair SAVE VTC 700] ventilation unit in the K22 attic and an extended system of pipes in valves to the majority of the rooms.

The ventilation unit supplies fresh air to the house, pre-warmed by the stale air it extracts from the house. Both air flows do not mix, they just transfer the heat inside the heat exchanger.

The system automatically adjusts the fan speed to maintain a consistent relative indoor humidity, thereby saving electric power.

== Air flow schema ==

[[File:/images/ventilation-plan.png]]

There are exceptions between floors: - [[rooms/silentoffice.md|Silent Office]] has supply instead of intake - K22-0 just has one intake in the [[rooms/freeshopstorage.md|Free Shop Storage]], but no supply - it pulls fresh air from the hallway and through the [[rooms/freeshoplounge.md|Free Shop Lounge]]

Also, ventilation piping is work-in-progress and will be extended as the house evolves.

== Statistics ==

You can get some statistics about the ventilation system in [[../digital/grafana.html|Grafana]]. Those statistics are pulled from the ventilation unit via [https://git.kanthaus.online/kanthaus/ventilation-watcher an ESP32 device communicating with it via Modbus].

== Maintenance ==

* Intake filters in the rooms: change and wash every 1-3 months when heating is running
* Central filters in the attic: replace and buy new filter every 12 months, ideally before winter
* Heat exchanger in the attic: wash every 1-2 years, maybe?

=== Change and wash intake filters ===

They are located in all rooms where air is sucked into the pipe, to prevent the pipe from getting dirty. Especially when radiators are running, a lot of dust is kicked up in the air and ends in the filters.

To check if a change is necessary, measure the air flow into the intake with an air flow meter (currently in K22-1-1). It doesn’t hurt to replace the filters more often.

You can take the filters out by simply pulling out the valve.

Fresh filters are in a box, currently in the Ex-food-storage (K22-1-1) as of 2023-02-23. Put the new filter on the outside of the pipe and insert the valve again. It’s a bit tricky to prevent the filter from getting pushed too far into the pipe.

You can wash the filters with a lot of water and dry them. Then they can be reused a few times, until holes appear.

=== Central filters in the attic ===

The SAVE VTC 700 ventilation devices has two filters, one for fresh air and one for used air. It’s important to replace the fresh air filter every 12 months, because it gets filled with dust and dirt from outside air. Especially spring and summer add a lot of pollution. When the filter gets full, the air supply can get smelly and the ventilation system doesn’t provide as much air. Hence, it’s good to replace the fresh air filter in autumn.

The used air filter doesn’t need to replaced regularly, as we have to filters on the intakes in the room (see section above).

First, buy a new fitting F7 filter, like those: - https://www.as-luftfilter.de/Ersatzflter-Lueftungsgeraete/Systemair/VTC-700/Ersatzfilter-passend-fuer-Systemair-VTC-700—Gueteklasse-F7.html - https://rt-handel.de/Ersatzfilter-Lueftung/Systemair/VTC-700/Ersatzfilter-passend-fuer-Systemair-VTC-700-Filterklasse-F7

Then turn off the ventilation device, open the main cover and unscrew the left panel. Slide out the old filter and take a picture to show it to interested people ;) Insert the new filter, carefully screw the panel on, close the main cover and turn on ventilation again.

=== Wash heat exchanger ===

We didn’t do this so far, but the heat exchanger can be rinsed with water to get rid of fine dust. This should increase its efficiency.