#hrv — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #hrv, 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%
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What Is Transferred
heat (primary)
sometimes moisture (in enthalpy units)
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Efficiency Example
outside: 0°C
indoor: +22°C
after recovery: ~16–20°C
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Advantages
reduced heating energy demand
continuous ventilation without major heat loss
improved indoor air quality
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Limitations
frost formation in winter (needs bypass or preheater)
filter maintenance required
upfront cost
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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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I have an interesting problem. Our apartment lacks adequate ventilation and our co2 levels are always very high. I have a monitors in multiple rooms and at night with the door closed our bedroom is around 1600-2000+ppm. The recommended levels are under 1000ppm. For adults its not great, but my wife and I are expecting our first in March. Prolonged co2 levels above 1500ppm increased risk potential cognitive effects and 2000ppm is very unhealthy for infants. There aren't any laws or regulations around residential indoor air quality, so the apartment complex doesn't have to remedy the situation.
#CO2 #IndoorAir #AirQuality #CO2Monitoring #HRV #HVAC #DIY #ApartmentLiving #homeassistant
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Bảng giá Honda tháng 11/2025: CR-V 1.5G 988 triệu, CR-V L 1.095 tỷ, City E 609 triệu, City G 629 triệu, City RS 679 triệu, HR-V G 769 triệu, HR-V L 899 triệu, Civic G 789 triệu, Civic RS 879 triệu, Accord 1.298 tỷ, Jazz 829 triệu, Pilot 1.799 tỷ. Giá tham khảo, chưa chiết khấu; Honda Việt Nam chưa công bố giá bán lẻ đề xuất. #Honda #BangGiaOto #ThiTruongOto #VietNam #CRV #HRV #Civic #City #Accord #VTCNews #GiaoThong #Oto #Kinhte
Ghi chú: Giá bảng chính thức chưa công bố; nhiều đại lý đang thông -
Bảng giá Honda tháng 11/2025: CR-V 1.5G 988 triệu, CR-V L 1.095 tỷ, City E 609 triệu, City G 629 triệu, City RS 679 triệu, HR-V G 769 triệu, HR-V L 899 triệu, Civic G 789 triệu, Civic RS 879 triệu, Accord 1.298 tỷ, Jazz 829 triệu, Pilot 1.799 tỷ. Giá tham khảo, chưa chiết khấu; Honda Việt Nam chưa công bố giá bán lẻ đề xuất. #Honda #BangGiaOto #ThiTruongOto #VietNam #CRV #HRV #Civic #City #Accord #VTCNews #GiaoThong #Oto #Kinhte
Ghi chú: Giá bảng chính thức chưa công bố; nhiều đại lý đang thông -
https://www.evshift.com/346560/2026-civic-cr-v-hr-v-2025-accord-happy-honda-days-value/ 2026 Civic, CR-V, HR-V, 2025 Accord | “Happy Honda Days – Value” #2026 #accord #civic #CrV #CRV #Days #ElectricCars #ElectricVehicles #EV #happy #HappyHondaDays #Honda #HrV #HRV #wonderland
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Jee, uusi taso saavutettu elämänpelissä nimeltä Oura - kiva uutinen näin vauva-arjen pelisäännöillä. Usein kuulee puhuttavan vauva-arjen työläydestä, mutta itselleni uusi yllättävä havainto, että sykevälivaihtelu (palautumisen laatua mittaava arvo) on lähes tuplaantunut vauvan tulon myötä! Veikkaan oksitosiinin selittävän kohonneita arvoja. Ehkä tämä taustalla myös siinä, miten esim. äidit kestävät vauvan kanssa tavallista katkonaisempia unia? #oura #resilienssi #hrv #vauva
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https://www.evshift.com/335402/2026-cr-v-hr-v-how-to-pair-and-use-an-iphone-with-bluetoothhandsfreelink/ 2026 CR-V, HR-V | How to Pair and Use an iPhone with Bluetooth®HandsFreeLink #Bluetooth #BluetoothHandsFreeLink #CRV #ElectricCars #ElectricVehicles #EV #HandsFree #Honda #HRV #iphone #Pair #PhonePairing
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https://www.evshift.com/334360/2026-cr-v-hr-v-how-to-prioritize-paired-phones/ 2026 CR-V, HR-V | How to Prioritize Paired Phones #CRV #ElectricCars #ElectricVehicles #EV #Honda #HRV #Paired #Phones #Prioritize
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https://www.evshift.com/334344/2026-cr-v-hr-v-how-to-pair-and-use-an-android-phone-with-bluetooth-handsfreelink/ 2026 CR-V, HR-V | How to Pair and Use an Android™ Phone with Bluetooth® HandsFreeLink #android #Bluetooth #CRV #ElectricCars #ElectricVehicles #EV #HandsFreeLink #Honda #HRV #Pair #Phone
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https://www.evshift.com/334307/2026-cr-v-hr-v-how-to-use-basic-audio-controls/ 2026 CR-V, HR-V | How to Use Basic Audio Controls ##basic #Audio #Controls #CRV #ElectricCars #ElectricVehicles #EV #Honda #HRV
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#Honda issues recall for the following vehicles due to a gearbox issue that could result in steering problems:
2022-2025 Honda Civic Sedan
2025 Honda Civic Hybrid Sedan
2022-2025 Honda Civic Hatchback
2025 Honda Civic Hybrid Hatchback
2023-2025 Honda Civic Type R
2023-2025 Honda CR-V
2023-2025 Honda CR-V Hybrid
2025 Honda CR-V Fuel Cell
2023-2025 Honda HR-V
https://www.cbsnews.com/news/honda-recall-us-steering-gearbox-acura/