#erv — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #erv, aggregated by home.social.
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Heat Recovery Ventilator (HRV) — Operating Principle
A recuperator (heat recovery unit) transfers heat from exhaust air to incoming fresh air without mixing the two streams.
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How It Works
Two airflows:
Exhaust air (warm, from indoors)
Supply air (cold, from outside)
They pass through a heat exchanger:
separated by plates or channels
no direct mixing
heat transfers through the material (conduction)
Result: → supply air is preheated
→ exhaust air is cooled
→ overall heat loss is reduced---
Types of Recuperators
1. Plate Heat Exchanger
aluminum or plastic plates
efficiency: ~60–90%
no moving parts
2. Rotary (Wheel) Heat Exchanger
rotating drum
transfers heat and some moisture
efficiency: up to ~85–90%
3. Counterflow Heat Exchanger
air streams move in opposite directions
highest efficiency: up to ~95%
---
What Is Transferred
heat (primary)
sometimes moisture (in enthalpy units)
---
Efficiency Example
outside: 0°C
indoor: +22°C
after recovery: ~16–20°C
---
Advantages
reduced heating energy demand
continuous ventilation without major heat loss
improved indoor air quality
---
Limitations
frost formation in winter (needs bypass or preheater)
filter maintenance required
upfront cost
---
Core Idea
A recuperator doesn’t generate heat — it recovers and reuses it.
#HVAC #HeatRecovery #HRV #ERV #EnergyEfficiency #Ventilation #IndoorAirQuality #AirExchange #HeatExchanger #SustainableLiving #GreenBuilding #EnergySaving #HomeComfort #SmartHome #BuildingEngineering #ClimateControl #EcoTech #Airflow #FreshAir #LowEnergy #PassiveHouse #NetZero #HomeImprovement #Engineering #CleanAir
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Heat Recovery Ventilator (HRV) — Operating Principle
A recuperator (heat recovery unit) transfers heat from exhaust air to incoming fresh air without mixing the two streams.
---
How It Works
Two airflows:
Exhaust air (warm, from indoors)
Supply air (cold, from outside)
They pass through a heat exchanger:
separated by plates or channels
no direct mixing
heat transfers through the material (conduction)
Result: → supply air is preheated
→ exhaust air is cooled
→ overall heat loss is reduced---
Types of Recuperators
1. Plate Heat Exchanger
aluminum or plastic plates
efficiency: ~60–90%
no moving parts
2. Rotary (Wheel) Heat Exchanger
rotating drum
transfers heat and some moisture
efficiency: up to ~85–90%
3. Counterflow Heat Exchanger
air streams move in opposite directions
highest efficiency: up to ~95%
---
What Is Transferred
heat (primary)
sometimes moisture (in enthalpy units)
---
Efficiency Example
outside: 0°C
indoor: +22°C
after recovery: ~16–20°C
---
Advantages
reduced heating energy demand
continuous ventilation without major heat loss
improved indoor air quality
---
Limitations
frost formation in winter (needs bypass or preheater)
filter maintenance required
upfront cost
---
Core Idea
A recuperator doesn’t generate heat — it recovers and reuses it.
#HVAC #HeatRecovery #HRV #ERV #EnergyEfficiency #Ventilation #IndoorAirQuality #AirExchange #HeatExchanger #SustainableLiving #GreenBuilding #EnergySaving #HomeComfort #SmartHome #BuildingEngineering #ClimateControl #EcoTech #Airflow #FreshAir #LowEnergy #PassiveHouse #NetZero #HomeImprovement #Engineering #CleanAir
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Heat Recovery Ventilator (HRV) — Operating Principle
A recuperator (heat recovery unit) transfers heat from exhaust air to incoming fresh air without mixing the two streams.
---
How It Works
Two airflows:
Exhaust air (warm, from indoors)
Supply air (cold, from outside)
They pass through a heat exchanger:
separated by plates or channels
no direct mixing
heat transfers through the material (conduction)
Result: → supply air is preheated
→ exhaust air is cooled
→ overall heat loss is reduced---
Types of Recuperators
1. Plate Heat Exchanger
aluminum or plastic plates
efficiency: ~60–90%
no moving parts
2. Rotary (Wheel) Heat Exchanger
rotating drum
transfers heat and some moisture
efficiency: up to ~85–90%
3. Counterflow Heat Exchanger
air streams move in opposite directions
highest efficiency: up to ~95%
---
What Is Transferred
heat (primary)
sometimes moisture (in enthalpy units)
---
Efficiency Example
outside: 0°C
indoor: +22°C
after recovery: ~16–20°C
---
Advantages
reduced heating energy demand
continuous ventilation without major heat loss
improved indoor air quality
---
Limitations
frost formation in winter (needs bypass or preheater)
filter maintenance required
upfront cost
---
Core Idea
A recuperator doesn’t generate heat — it recovers and reuses it.
#HVAC #HeatRecovery #HRV #ERV #EnergyEfficiency #Ventilation #IndoorAirQuality #AirExchange #HeatExchanger #SustainableLiving #GreenBuilding #EnergySaving #HomeComfort #SmartHome #BuildingEngineering #ClimateControl #EcoTech #Airflow #FreshAir #LowEnergy #PassiveHouse #NetZero #HomeImprovement #Engineering #CleanAir
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Aviation weather for Kerrville Municipal Louis Schreiner Field airport (USA) is “KERV 191735Z AUTO 20007KT 10SM CLR 21/13 A3025 RMK AO2 T02070132” : See what it means on https://www.bigorre.org/aero/meteo/kerv/en #kerrvillemunicipallouisschreinerfieldairport #airport #kerrville #usa #kerv #erv #metar #aviation #aviationweather #avgeek vl
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Aviation weather for Kerrville Municipal Louis Schreiner Field airport (USA) is “KERV 191735Z AUTO 20007KT 10SM CLR 21/13 A3025 RMK AO2 T02070132” : See what it means on https://www.bigorre.org/aero/meteo/kerv/en #kerrvillemunicipallouisschreinerfieldairport #airport #kerrville #usa #kerv #erv #metar #aviation #aviationweather #avgeek vl
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Aviation weather for Kerrville Municipal Louis Schreiner Field airport (USA) is “KERV 191735Z AUTO 20007KT 10SM CLR 21/13 A3025 RMK AO2 T02070132” : See what it means on https://www.bigorre.org/aero/meteo/kerv/en #kerrvillemunicipallouisschreinerfieldairport #airport #kerrville #usa #kerv #erv #metar #aviation #aviationweather #avgeek vl
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Aviation weather for Kerrville Municipal Louis Schreiner Field airport (USA) is “KERV 191735Z AUTO 20007KT 10SM CLR 21/13 A3025 RMK AO2 T02070132” : See what it means on https://www.bigorre.org/aero/meteo/kerv/en #kerrvillemunicipallouisschreinerfieldairport #airport #kerrville #usa #kerv #erv #metar #aviation #aviationweather #avgeek vl
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Aviation weather for Kerrville Municipal Louis Schreiner Field airport (USA) is “KERV 191735Z AUTO 20007KT 10SM CLR 21/13 A3025 RMK AO2 T02070132” : See what it means on https://www.bigorre.org/aero/meteo/kerv/en #kerrvillemunicipallouisschreinerfieldairport #airport #kerrville #usa #kerv #erv #metar #aviation #aviationweather #avgeek vl
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@qbi Kleiner Hinweis: wer eine #Auskunftssperre beim #Einwohnermeldeamt oder beim #Kraftfahrtbundesamt eingetragen hat, sollte das #MeinJustizPostfach nicht nutzen. Denn alle zugelassenen Nutzer*innen können die private Adresse im #SAFE - Verzeichnis sehen. Das Problem besteht seit Anfang, wurde schon auf vielen Ebenen angesprochen, eine Behebung ist aber nicht in Sicht.
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Aviation weather for Kerrville Municipal Louis Schreiner Field airport (USA) is “KERV 061855Z AUTO 31004KT 10SM CLR 25/M06 A3020 RMK AO2 T02521056” : See what it means on https://www.bigorre.org/aero/meteo/kerv/en #kerrvillemunicipallouisschreinerfieldairport #airport #kerrville #usa #kerv #erv #metar #aviation #aviationweather #avgeek vl
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Aviation weather for Kerrville Municipal Louis Schreiner Field airport (USA) is “KERV 061855Z AUTO 31004KT 10SM CLR 25/M06 A3020 RMK AO2 T02521056” : See what it means on https://www.bigorre.org/aero/meteo/kerv/en #kerrvillemunicipallouisschreinerfieldairport #airport #kerrville #usa #kerv #erv #metar #aviation #aviationweather #avgeek vl
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Aviation weather for Kerrville Municipal Louis Schreiner Field airport (USA) is “KERV 061855Z AUTO 31004KT 10SM CLR 25/M06 A3020 RMK AO2 T02521056” : See what it means on https://www.bigorre.org/aero/meteo/kerv/en #kerrvillemunicipallouisschreinerfieldairport #airport #kerrville #usa #kerv #erv #metar #aviation #aviationweather #avgeek vl
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Aviation weather for Kerrville Municipal Louis Schreiner Field airport (USA) is “KERV 061855Z AUTO 31004KT 10SM CLR 25/M06 A3020 RMK AO2 T02521056” : See what it means on https://www.bigorre.org/aero/meteo/kerv/en #kerrvillemunicipallouisschreinerfieldairport #airport #kerrville #usa #kerv #erv #metar #aviation #aviationweather #avgeek vl
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Aviation weather for Kerrville Municipal Louis Schreiner Field airport (USA) is “KERV 061855Z AUTO 31004KT 10SM CLR 25/M06 A3020 RMK AO2 T02521056” : See what it means on https://www.bigorre.org/aero/meteo/kerv/en #kerrvillemunicipallouisschreinerfieldairport #airport #kerrville #usa #kerv #erv #metar #aviation #aviationweather #avgeek vl
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Pregnenolone promotes immune evasion through blocking endogenous #retrovirus expression.
Sexual abstinence promotes #tumor progression by inducing #pregnenolone production. Pregnenolone facilitates the formation of H3K9me3 to suppress #ERV replication.
https://www.sciencedirect.com/science/article/abs/pii/S1550413125005844 #microbiology #cancer
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Pregnenolone promotes immune evasion through blocking endogenous #retrovirus expression.
Sexual abstinence promotes #tumor progression by inducing #pregnenolone production. Pregnenolone facilitates the formation of H3K9me3 to suppress #ERV replication.
https://www.sciencedirect.com/science/article/abs/pii/S1550413125005844 #microbiology #cancer
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Pregnenolone promotes immune evasion through blocking endogenous #retrovirus expression.
Sexual abstinence promotes #tumor progression by inducing #pregnenolone production. Pregnenolone facilitates the formation of H3K9me3 to suppress #ERV replication.
https://www.sciencedirect.com/science/article/abs/pii/S1550413125005844 #microbiology #cancer
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Pregnenolone promotes immune evasion through blocking endogenous #retrovirus expression.
Sexual abstinence promotes #tumor progression by inducing #pregnenolone production. Pregnenolone facilitates the formation of H3K9me3 to suppress #ERV replication.
https://www.sciencedirect.com/science/article/abs/pii/S1550413125005844 #microbiology #cancer
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Die Behörde schreibt "Vorab per BeBPo" auf ihren Schriftsatz und jetzt weiß ich auch nicht... #erv #eakte #digitalisierung #teamresopal #justiz #ejustice
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Es war ja irgendwie zu erwarten... kaum ist die #eAkte eingeführt, kommt mir zum ersten mal eine Akte unter, die man genau so ans JPA hätte schicken können. Aber wo ist denn bitte das entsprechende Ankreuzkästchen auf dem eAktendekcel geblieben? Das wird doch nicht etwa der Digitalisierung zum Opfer gefallen sein?? #teamresopal #justiz #ejustice #erv
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ERV's are often surprisingly expensive for what amounts to filters and fans inside a box. They are often also complicated enough, requiring multiple ducts etc. that they feel out of reach for many people who might otherwise be willing to DIY
Some ductless or more direct duct systems exist, but again, also just sort of surprisingly expensive
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HRV Gets Home Automation Upgrades https://hackaday.com/2025/10/26/erv-gets-home-automation-upgrades/ #energyrecoveryventilator #heatrecoveryventilator #homeautomation #greenhacks #homehacks #ESP32 #CAN #ERV
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HRV Gets Home Automation Upgrades - In our modern semi-dystopia, it seems like most companies add automation features ... - https://hackaday.com/2025/10/26/erv-gets-home-automation-upgrades/ #energyrecoveryventilator #heatrecoveryventilator #homeautomation #greenhacks #homehacks #esp32 #can #erv
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Aviation weather for Kerrville Municipal Louis Schreiner Field airport (USA) is “KERV 151635Z AUTO 17011KT 10SM SCT029 30/21 RMK AO2 T02980211” : See what it means on https://www.bigorre.org/aero/meteo/kerv/en #kerrville #usa #kerrvillemunicipallouisschreinerfieldairport #kerv #erv #metar #aviation #aviationweather #avgeek #airport vl
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Aviation weather for Kerrville Municipal Louis Schreiner Field airport (USA) is “KERV 151635Z AUTO 17011KT 10SM SCT029 30/21 RMK AO2 T02980211” : See what it means on https://www.bigorre.org/aero/meteo/kerv/en #kerrville #usa #kerrvillemunicipallouisschreinerfieldairport #kerv #erv #metar #aviation #aviationweather #avgeek #airport vl
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Aviation weather for Kerrville Municipal Louis Schreiner Field airport (USA) is “KERV 151635Z AUTO 17011KT 10SM SCT029 30/21 RMK AO2 T02980211” : See what it means on https://www.bigorre.org/aero/meteo/kerv/en #kerrville #usa #kerrvillemunicipallouisschreinerfieldairport #kerv #erv #metar #aviation #aviationweather #avgeek #airport vl
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Aviation weather for Kerrville Municipal Louis Schreiner Field airport (USA) is “KERV 151635Z AUTO 17011KT 10SM SCT029 30/21 RMK AO2 T02980211” : See what it means on https://www.bigorre.org/aero/meteo/kerv/en #kerrville #usa #kerrvillemunicipallouisschreinerfieldairport #kerv #erv #metar #aviation #aviationweather #avgeek #airport vl
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Aviation weather for Kerrville Municipal Louis Schreiner Field airport (USA) is “KERV 151635Z AUTO 17011KT 10SM SCT029 30/21 RMK AO2 T02980211” : See what it means on https://www.bigorre.org/aero/meteo/kerv/en #kerrville #usa #kerrvillemunicipallouisschreinerfieldairport #kerv #erv #metar #aviation #aviationweather #avgeek #airport vl
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Wichtig: bei der Ausgangskontrolle im #Anwaltspostfach (#beA) muss sichergestellt sein, dass tatsächlich der gewünschte Inhalt versendet wird. Das sich Verlassen auf eine allzu bequeme #Schnittstelle ist riskant
https://www.rechtslupe.de/zivilrecht/berufungsbegruendung-per-bea-und-die-fehlerhafte-pdf-datei-3317951 -
Yeah, ok, I had to get out a pencil and figure this one out...
Getting an #ERV installed to help with our high indoor CO2 levels, and this large silver hexapus has so many branches it's difficult to figure out where they all go.
As this house had a "supply" line to a closet that was actually tapped off of a return I'm not going to assume they're all correct.
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Die neue Bekanntmachung zur Elektronischer Rechtsverkehr Verordnung (#ERVB) wurde veröffentlicht:
https://justiz.de/laender-bund-europa/elektronische_kommunikation/bundesanzeiger_29_07_2025.pdf
Neu ist die Nutzbarkeit von USB Speichermedien (Ziffer 4c)#ERV #Rechtsverkehr #USB #Anwaltssoftware #Kanzleisoftware #LawFirm #InfoService
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Wichtig: bei der Ausgangskontrolle im #Anwaltspostfach (#beA) kommt es auf die #Eingangsbestätigung der Justiz an. Ein Zustellzertifikat einer #Kanzleisoftware aus der beA #Schnittstelle ist kein Ersatz!
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Hey, #HVAC fans out there. I had looked into HRV/ERV systems several years ago due to very high CO2 levels in this house with only 2 people indoors, but the price, size, and extra ducting seemed prohibitive.
Just took a look around and apparently there are now ductless ERVs which seem like a great idea - basically I really just need an automated window to bring in or vent fresh air during the day.
Has anyone used pairs of these devices? Would love to hear experiences if you have some. Thanks.
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Hey, #HVAC fans out there. I had looked into HRV/ERV systems several years ago due to very high CO2 levels in this house with only 2 people indoors, but the price, size, and extra ducting seemed prohibitive.
Just took a look around and apparently there are now ductless ERVs which seem like a great idea - basically I really just need an automated window to bring in or vent fresh air during the day.
Has anyone used pairs of these devices? Would love to hear experiences if you have some. Thanks.
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Das KG Berlin hatte sich mit der Wirksamkeit der #Zustellung eines Urteils im #ERV beschäftigen müssen, nachdem der Empfänger kein #eEB zurückgesandt hatte.
Spoiler: Zustellungsmangel geheilt. § 189 ZPO regelt.
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Got our Lunos HRV temporarily wired up so we actually have some ventilation while we’re working. Based on the air quality sensor in the building, it seems to be working as designed.
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@offenenetze @ervjustiz Bei uns gibt es Hybridakten (eAkte führend) nur nach Verfahrensübernahme oder Instanzensprung nach dem Stichtag. Der Rest im analogen Bestand wird bis zur Erledigung analog fortgeführt (perspektivisch ändert sich das vermutlich zumindest in der Betreuung…). Bisher gute Erfahrungen mit diesem Modell. #erv #ejustice #justiz #teamresopal #eakte
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Das BVerfG wird ab 1. August am Elektronischen Rechtsverkehr teilnehmen und hat dafür eine Infoseite angelegt:
https://www.bundesverfassungsgericht.de/DE/Verfahren/Elektronischer%20Rechtsverkehr/eRV_node.html
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#Anwaltspostfach (#beA) - Nachrichten versandfertig, sicher und bequem auf Knopfdruck mit http://beA.expert und der Anwaltssoftware LawFirm, Details + besonderes Angebot unter https://kanzleirechner.de/angebote/lawfirm-angebot-bea-expert
#Anwaltssoftware #Kanzleisoftware #Rechtsverkehr #ERV #Digitalisierung -
Bonjour! Hinweis an die Kolleg*innen: Der #ERV in #NRW ist offenbar weiterhin massiv gestört:
https://egvp.justiz.de/meldungen/index.php -
Seit 1.1.2024 gelten neue Regelungen im elektronischen Rechtsverkehr (#ERV) im Verwaltungsverfahren gem. § 3a VwVfG und § 36a SGB I. Insbesondere bei der Nutzung von #beA und #eBO.
https://ervjustiz.de/elektronischer-rechtsverkehr-mit-behoerden
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Mal ganz was anderes - #jurabubble: es gibt hier aktuell den Fall, wo ein fristwahrender Schriftsatz per #beA an das #Landgericht Verden versendet wurde, mit korrektem Sendebericht und allem. Dann kommt ein paar Tage später ein Anruf vom LG Göttingen, dass man da einen Eingang hätte, den man nicht zuordnen kann. Auf Nachfrage in Verden ist die Sendung dort nicht eingegangen.
Und jetzt frage ich mich, wie ist sowas überhaupt möglich? #erv #BesonderesElektronischesAnwaltspostfach #Anwaltsalltag
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#Justiz #LegalTech #KI #ChatGPT #ERV
Ganz so rückständig sind #Gerichte nicht. Elektronischer Rechtsverkehr funktioniert bundesweit. #BadenWürttemberg hat #eAkte flächendeckend, im #StrafR immerhin Pilotversuche. Und KI arbeitet schon kräftig mit: #Übersetzungstool, #OLGA, #Codefy, #Jano. #OnlineVerfahren werden bald pilotiert.
Trotzdem: es wäre noch viel Disruption möglich. Wir arbeiten dran!
