#hvac — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #hvac, aggregated by home.social.
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Carrier Reveals Subsidiary Serviced Iran Embassy
Topline American HVAC firm Carrier Global disclosed Tuesday that a German heating company it bought for roughly 12…
#NewsBeep #News #BreakingNews #acquisition #breakingnews #Business #carrier #Earnings #hvac #Iran #Stock
https://www.newsbeep.com/666984/ -
Modern Refrigeration and Air Conditioning 22nd Edition
Andrew D. Althouse, Carl H. Turnquist, Alfred F. Bracciano, Daniel C. Bracciano, Gloria M. Bracciano
Goodheart-Willcox: Twenty Second Edition
Download 9798888174890 👉 https://lttr.ai/AtGG8
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A truly comfortable home starts with high-performance heating and cooling systems. #lifestyle #homecomfort #hvac
Posted into FLIPBOARD EXCHANGE FEED 🗞️ @flipboard-exchange-feed-Econopass
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I keep reading about Corsi–Rosenthal boxes as DIY air purifiers that outperform all commercially available air purifiers.
You literally only duct-tape four HVAC filters together and slap any regular PC fan onto them.
US-Americans recommend the brand #Filtrete for MERV-rated HVAC filters, but in Europe that brand costs at least twice or thrice as much as in the USA.
Are there any equivalent affordable HVAC filters in Europe with a MERV rating of 8 or 13? Or do I simply have to swallow the additional cost because HVAC filters aren't as ubiquitous in Europe as they are in North America?
#DIY #CorsiRosenthalBox #CorsiRosenthal #HVAC #HEPA #MERV #AirQuality #AirPurifier #AirFilter
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I keep reading about Corsi–Rosenthal boxes as DIY air purifiers that outperform all commercially available air purifiers.
You literally only duct-tape four HVAC filters together and slap any regular PC fan onto them.
US-Americans recommend the brand #Filtrete for MERV-rated HVAC filters, but in Europe that brand costs at least twice or thrice as much as in the USA.
Are there any equivalent affordable HVAC filters in Europe with a MERV rating of 8 or 13? Or do I simply have to swallow the additional cost because HVAC filters aren't as ubiquitous in Europe as they are in North America?
#DIY #CorsiRosenthalBox #CorsiRosenthal #HVAC #HEPA #MERV #AirQuality #AirPurifier #AirFilter
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HVAC filter System
https://www.youtube.com/watch?v=DXya56NIaVM
This system will cost you between 30 and 60 US dollars replacing 300 US dollar systems
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HVAC filter System
https://www.youtube.com/watch?v=DXya56NIaVM
This system will cost you between 30 and 60 US dollars replacing 300 US dollar systems
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In the Canadian Smokestream right now! Graph from #HomeAssistant, showing PM2.5 readings. Outside is from the nearest station reporting to #WAQI, inside from #IKEA Vindstyrka. At 8pm, I switched from washable HVAC filters to MERV10 disposables. Around midnight, turned on #CorsiRosenthalBox, full speed. (Same room as sensor.)
So, #hvac was doing ok, MERV10 improved it. The CR really made a big difference, and quickly, lowering the level about 2.5x. -
In the Canadian Smokestream right now! Graph from #HomeAssistant, showing PM2.5 readings. Outside is from the nearest station reporting to #WAQI, inside from #IKEA Vindstyrka. At 8pm, I switched from washable HVAC filters to MERV10 disposables. Around midnight, turned on #CorsiRosenthalBox, full speed. (Same room as sensor.)
So, #hvac was doing ok, MERV10 improved it. The CR really made a big difference, and quickly, lowering the level about 2.5x. -
An #HVAC Apprentice’s view on the “#AC Usage = Climate Change” debate : r/Anticonsumption
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An #HVAC Apprentice’s view on the “#AC Usage = Climate Change” debate : r/Anticonsumption
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Marine Heat Pumps Gain Momentum as Shipping Seeks Cleaner Heating and Cooling Solutions
https://www.cashlesstime.com/2026/07/marine-heat-pumps-gain-momentum-as.html?m=1#MarineHeatPumps #ShippingIndustry #Maritime #CleanShipping #GreenShipping #Decarbonization #EnergyEfficiency #HeatPump #SustainableShipping #MaritimeTechnology #CleanEnergy #HVAC #ShipTechnology #MarineEngineering #NetZero #EmissionReduction #ClimateTech #ShippingNews #Innovation #CashlessTime
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Хотел написать регулятор для руфтопа. Пришлось решать дифференциальные уравнения
В прошлый раз я писал про голосового ИИ на Asterisk и Яндексе. Фурора не случилось, но статью открыли семьсот с лишним человек, в ленте её увидели тысячи, а в комментариях нашлись те, кто делает ровно то же — с той же болью и теми же вопросами про задержки и оценку качества ответов. Значит, тема живая, и про свои проекты писать имеет смысл. Сегодня — про другое, с виду куда более скучное: регулятор для руфтопа. Руфтоп — это крышный кондиционер, большой ящик на крыше торгового центра. Логика — по сути термостат с амбициями: держи температуру, включай компрессоры по запросу, не дай им зачастить. Я закладывал пару недель. Кончилось это системой дифференциальных уравнений с собственным движком, которая пять раз убедила меня, что всё работает, а потом оказывалось — неправильно. А главное — кончилось не регулятором вовсе. Регулятор оказался тривиальным. Настоящая работа была в другом: научить систему честно говорить, что с железом не так, — и не соврать при этом ни одной цифрой. Голый тезис на весь текст: термостат — это просто, пока не спросишь, что физически происходит внутри. После этого вопроса начинается наука. А приборы, которые показывают «всё в норме», врут убедительнее всего — и заставить их не врать труднее, чем написать сам регулятор. Читать и пить кофе
https://habr.com/ru/articles/1057154/
#HVAC #холодильный_контур #R407C #цифровой_двойник #SIL #дифференциальные_уравнения #CasADi #предиктивная_диагностика #автоматизация_зданий #моделирование
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To all the field service professionals out there. What if paperwork only took minutes? Or even seconds?
Website: https://jobslip.stean.dev
App Store: https://apps.apple.com/us/app/jobslip/id6781482955
#JobSlip #FieldService #Tradespeople #Electrician #Plumber #HVAC #Construction #SmallBusiness #Productivity #AppStore #iPhone #iPad
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Does anyone in the Portland, Oregon area happen to need a few 14x24x1 furnace filters? Our new setup takes a different size and it seems a shame for them to go to waste.
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Does anyone in the Portland, Oregon area happen to need a few 14x24x1 furnace filters? Our new setup takes a different size and it seems a shame for them to go to waste.
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3 days during Maryland heat dome event. HVAC used 41kWh + 15kWh, so 56kWh with heat pumps keeping the house at 75f. My personal data center used 78kWh 😆 But it was all solar powered....and my neighbors too! #solar #heatdome #renewables #hvac #airconditioning #energy
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3 days during Maryland heat dome event. HVAC used 41kWh + 15kWh, so 56kWh with heat pumps keeping the house at 75f. My personal data center used 78kWh 😆 But it was all solar powered....and my neighbors too! #solar #heatdome #renewables #hvac #airconditioning #energy
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RE: https://mastodon.nl/@Marloezovic/116809039998000765
Voor het eind van de zomer is t ieders nachtmerrie of verademing...
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RE: https://mastodon.nl/@Marloezovic/116809039998000765
Voor het eind van de zomer is t ieders nachtmerrie of verademing...
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https://www.evshift.com/473272/ev-car-hv-battery-pack-maintenance-electriccar-automobile-hvac-harrierev-tesla-bydatto2-phev/ EV car HV Battery Pack Maintenance #electriccar #automobile #hvac #harrierev #tesla #bydatto2 #phev ##harrierev #automobile #Battery #bydatto2 #car #ElectricCar #ElectricCars #ElectricVehicles #electriccar #EV #HVAC #maintenance #Pack #phev #Tesla
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Having an #HVAC discussion and I wonder if a misconception about modern "mini-split" #heatpumps is that you're limited to having that thing on the wall in each room. You aren't. Our house was built in 1934 and the rooms are all small - this wasn't open-plan living - so that meant multiple heads and that was ugly and expensive. So, instead, we have a unit that sits in the basement where the furnace used to be and uses the existing ductwork. And our upstairs unit is mounted in the ceiling.
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Having an #HVAC discussion and I wonder if a misconception about modern "mini-split" #heatpumps is that you're limited to having that thing on the wall in each room. You aren't. Our house was built in 1934 and the rooms are all small - this wasn't open-plan living - so that meant multiple heads and that was ugly and expensive. So, instead, we have a unit that sits in the basement where the furnace used to be and uses the existing ductwork. And our upstairs unit is mounted in the ceiling.
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@voiceofunreason @yantor3d yeah we didn't have anything until we replaced the oil heat and tank with our Mitsubishi Mr Slim, but that was also paired with insulating the house and solar panels, so it was an enormous project. My career advice for young people is #HVAC because the majority of houses in #Portland probably need the same thing and no AI is going to do it.
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@voiceofunreason @yantor3d yeah we didn't have anything until we replaced the oil heat and tank with our Mitsubishi Mr Slim, but that was also paired with insulating the house and solar panels, so it was an enormous project. My career advice for young people is #HVAC because the majority of houses in #Portland probably need the same thing and no AI is going to do it.
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🔥 Ferroli at Arne Nielsen A/S
🔧 Large spare-parts stock — continuously replenished
♨️ Atlas cast-iron boilers in stock — 3-pass, oil/gas
✅ One supplier, fast delivery -
Well crap. #HVAC is busted. AGAIN. It's been off for months and now it's suddenly randomly turning on the blower motor and turning it off. When it turns on it will stay on for hours. Completely disconnected thermostat and it still does it. Has my ECM blower motor crapped out for a THIRD time? #HomeRepair #DIY
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Well crap. #HVAC is busted. AGAIN. It's been off for months and now it's suddenly randomly turning on the blower motor and turning it off. When it turns on it will stay on for hours. Completely disconnected thermostat and it still does it. Has my ECM blower motor crapped out for a THIRD time? #HomeRepair #DIY
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Trump ritocca i dazi sui metalli (anche acciaio e alluminio) per sostenere agricoltura e industria
https://www.metallirari.com/breakingnews35/
#Acciaio #Steel #Alluminio #Aluminium #Rame #Copper #Dazi #TariffeUSA #Trump #Industria #MetalMarkets #Metalli #Mercati #Geopolitica #Manufacturing #HVAC #Agricoltura #FarmEquipment #SupplyChain #Commodities #EconomiaUSA #TradeWar #Metallirari #SteelMarket #GlobalMarkets -
ĐIỀU HÒA ÂM TRẦN CASSETTE DAIKIN CHÍNH HÃNG
Điều hòa âm trần Cassette Daikin là lựa chọn phù hợp cho những không gian cần khả năng làm mát ổn định, thiết kế thẩm mỹ và độ bền cao. Với kiểu lắp âm trần, thiết bị giúp không gian gọn gàng hơn, hạn chế chiếm diện tích tường và tạo cảm giác chuyên nghiệp cho công trình.
Xem sản phẩm tại:
https://dieuhoanoithat.vn/dieu-hoa-am-tran-cassette-daikin#DNAHVAC #DieuHoaAmTranDaikin #DieuHoaCassetteDaikin #Daikin #DieuHoaChinhHang #HVAC
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apparently the company/product that lost me as an HVAC customer is called Avoca: https://www.avoca.ai/customers/apex-service-partners
here's a demo of this pile of shit: https://www.avoca.ai/inbound
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Called my (soon to be former) HVAC vendor[1] and the call was answered by an AI human voice… that did not disclose it was an AI.
It pretended to be human. After 2-3 exchanges (as awkward as you'd expect), I asked.
I'm not sure I've ever been more ready to run away from a vendor. I escalated to a real person, who was thrilled to pass along my feedback.
1: BelRed Heating/Gene Johnson, which is one of many trade names of Apex Service Partners. fuck them.
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Швейцарский нож Инженера АСУ ТП: Ищем, подслушиваем, настраиваем и шьём по Modbus одной утилитой
При проведении пуско-наладочных работ на объекте Инженерам часто приходится иметь дело с "солянкой" различного оборудования на линиях RS-485, передающих данные по Modbus RTU на "средний", или "верхний" (в BMS\SCADA) уровни. Написали программу, которая умеет искать Modbus RTU устройства по COM-порту, а так же через преобразователи интерфейсов с протоколами Modbus RTU over TCP и Modbus TCP. Прописали IP адрес и порт шлюза, выбрали протокол и готово.
https://habr.com/ru/articles/1037242/
#асутп #scada #modbus #scanner #hvac #овик #инженерия #пнр #утилиты #wirenboard
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Thats nearly summer 🌞
Got stuck on developing Revit drawings
All things engineering #revit2023 #hvac
#buildings #valves #wastewater #watersupply -
↙️I'm glad that #MIT startup #transaera found a secret sauce for HVAC dehumidification: coupling a new solid desiccant with heat pumps!
↘️I worked on reducing solid and liquid desiccant #HVAC costs back in the 1990s; see "Reduced-Cost, Desiccant-Based DHC Systems"
DOI: 10.13140/RG.2.2.12617.57449
#Energy #TENs #heatpumps -
It turns out that one of the players in my first playtest for the sci-fi HVAC repair TTRPG module I'm working on actually has seven years of professional HVAC experience! What a fantastic coincidence!
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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