#passivehouse — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #passivehouse, aggregated by home.social.
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Recommended for:
Architects, Designers, Interior Designers
Engineers, Building Officials, Consultants
Builders, Developers, Tradespeople
Students, Teachers
#climate #energy #efficiency #Ottawa #passivehouse
RE: https://bsky.app/profile/did:plc:r54jzvfjfeb7owrkccdneox4/post/3mpzjm5anwr2p -
Recommended for:
Architects, Designers, Interior Designers
Engineers, Building Officials, Consultants
Builders, Developers, Tradespeople
Students, Teachers
#climate #energy #efficiency #Ottawa #passivehouse
RE: https://bsky.app/profile/did:plc:r54jzvfjfeb7owrkccdneox4/post/3mpzjm5anwr2p -
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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h/t @gwagner: "505 State Street is New York’s first all-electric skyscraper"
"Like 505 State Street, the new [500-seat elementary] school building [PS 456] will mark a first — the first #PassiveHouse public school in the city."
Let's hope NYC DOE sees how much savings they get in heating/cooling/electric from this #PassiveHaus school and decides to retrofit the rest of their schools..
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h/t @gwagner: "505 State Street is New York’s first all-electric skyscraper"
"Like 505 State Street, the new [500-seat elementary] school building [PS 456] will mark a first — the first #PassiveHouse public school in the city."
Let's hope NYC DOE sees how much savings they get in heating/cooling/electric from this #PassiveHaus school and decides to retrofit the rest of their schools..
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Another one of our long reads, just last year we took a look at the deep #retrofit of a 1930s dwelling on the Hampshire coast. It provides a pitch-perfect example of how to transform old dwellings while preserving their original structure and minimising #EmbodiedCarbon utterly transforming the living space without the need for an extension, and creating a cosy home that uses two-thirds less energy than before.
https://us5.campaign-archive.com/?u=7e15928685d0d3ee3d247ce0e&id=b82a9723c8
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Another one of our long reads, just last year we took a look at the deep #retrofit of a 1930s dwelling on the Hampshire coast. It provides a pitch-perfect example of how to transform old dwellings while preserving their original structure and minimising #EmbodiedCarbon utterly transforming the living space without the need for an extension, and creating a cosy home that uses two-thirds less energy than before.
https://us5.campaign-archive.com/?u=7e15928685d0d3ee3d247ce0e&id=b82a9723c8