eugenijusr
It does help a lot and I couldn't imagine living without it.
- Filters out particle pollution - https://twitter.com/eugenijusr/status/1105740301493260289
- Removes CO2 - averages ~650ppm in all rooms, almost never goes higher than 1000ppm (3 person household).
- Retains up to 85% of heat (based on the specs) using the exchanger, but also has an active electric heater inside that can be turned on in winter for ultimate comfort.
- Removes moisture from the bathroom and kitchen and dumps it into the drain via a separate drain pipe.
- Isolates from the outside noise as you can keep your windows closed shut all the time.
It does have some drawbacks however:
- Up to +6dB noise in rooms when running at full power (I run it at 20% at night which only adds ~+1dB).
- F7 class filters need to be changed every 3-6 months (~50€).
- Air intake grill with a pre-filter mesh needs thorough cleaning every 6-12 months as it usually gets clogged with debris in spring and autumn.
Not sure if it's due to these drawbacks or lack of knowledge lots of residents don't actually use their unit. You can tell by the open windows all year round. Most say it's too noisy for them - most probably due to lack of maintenance. Others are just plain ignorant saying opening windows is the only way to get "fresh air".
Screenshots taken literally seconds apart refreshed multiple times to make sure it's still the same:
http://eugene.lt/booking/1.png macOS on a MacBook Pro from New York, NY (via a DigitalOcean droplet VPN)
http://eugene.lt/booking/2.png Fresh Windows 10 VM from Vilnius, Lithuania
I don't know if they're planning to offer a debit card though.
Places you could try looking them up:
So my advice would be if you're building a JavaScript only app you have to really know what you're doing, because it's very easy to get carried away with it. Keep in mind that you risk making it "incompatible" with the web. When a need arises to be "compatible" you might end up finding yourself building second version of the same app.
There are a few similar services implemented already though, but they are either too complex or too primitive in my opinion, therefore I decided to give a shot rolling out my own solution. Nevertheless, the ones that I have found are:
The goal was to fit everything onto a single page. Laid out in HTML and simply saved to PDF with Safari.