fifteenforty

9 ms·

31.
by fifteenforty 4y ago
Can you give me an example of a comparable model available in the US?
32.
by fifteenforty 4y ago
Mitsubishi Electric or Mitsubishi Heavy Industries? I sourced opinions far and wide and in the end it seemed to be a coin toss between Mitsubishi Electric and Daikin. A lot of it comes done to parts availability, and both seem very strong i
33.
by fifteenforty 4y ago
US energy.gov
34.
by fifteenforty 4y ago
Have you examined your insulation with a thermal camera? Might be worth your while to get an energy inspector out. Personally I haven’t yet, mostly because I can still see low hanging fruit to fix.
35.
by fifteenforty 4y ago
Approximately 70% of the heat loss from your body is as radiated heat. Ceiling insulation is critical for thermal comfort. Have a look at the Efficiency Matrix YouTube channel videos on insulation consistency.
36.
by fifteenforty 4y ago
A recirculating central heating system doesn't do that. As mentioned below you either need exhaust only ventilation, balanced ventilation or ideally ERV/HRV. All of the above are available in both ducted and ductless forms.
37.
by fifteenforty 4y ago
-40% for the duct heat loss
38.
by fifteenforty 4y ago
I paid real money to have my ducts removed. They cause issues installing comprehensive insulation and caused hot/cold spots on the ceiling.
39.
by fifteenforty 4y ago
It’s a ‘mini split’ in US lingo. There are thin, highly insulated refrigerant lines going between the outside unit and the inside unit. The inside unit exchanges heat with the air. https://www.daikin.com.au/our-product-range
40.
by fifteenforty 4y ago
This unit runs at about 5
41.
by fifteenforty 4y ago
US and Australian units are different for insulation, but in my terms the insulation around the best ducts is R1.5, but good ceiling insulation is R6. 4x difference Edit: not to mention the huge difference in surface area. Ducts can expose
42.
by fifteenforty 4y ago
Obviously a new EC fan will be more efficient than a 20 year old AC fan, but I’m talking about a retrofit application here.
43.
by fifteenforty 4y ago
700W for the gas ducted heater fan. That’s the steady state energy consumption of all 3 units heat pumps running simultaneously. This is a small house of 100 square metres/1100 square feet.
44.
by fifteenforty 4y ago
You have to think carefully about where you run the ducts. They can be a huge source of energy loss. 40% is the number quoted by the EPA. Most roofs in Australia still aren’t sealed. The air barrier and insulation barrier is the ceiling. Th
45.
by fifteenforty 4y ago
In a house I own in Melbourne, Australia, I just replaced an old gas central heating system with 3 new top of the line Daikin mini split heat pumps. The new units can heat the entire house for the same amount of electrical energy that was u
46.
by fifteenforty 4y ago
Ahh, remember Windows 95/98 Active Desktop? What a resource pig! Seemed cool at the time though.
47.
by fifteenforty 4y ago
Unless these warm spaces also have appropriate ventilation and filtration, they will end up as spreaders of respiratory viruses (flu, RSV, SARS-CoV-2). I’ve seen no comment about this in any of the media reports.
48.
by fifteenforty 4y ago
I can see it being useful for running ultra thin bend insensitive fibre around base boards; just like the FTTR thing Huawei is trying to sell. I wish the concept was more clearly legal in Australia. I’m pretty sure once you glue the fiber i
49.
by fifteenforty 4y ago
Does anyone have any more info on Huawei’s FTTR concept? https://www.huawei.com/en/technology-insights/inspiration-la... To me it looks like just standard, modern bend insensitive single mode fibre but in a clear
50.
by fifteenforty 4y ago
I’ve looked into installing a system like this in Australia. It only barely makes financial sense as part of a new build. Maybe in the colder UK climate it would make more, but surely not as a retrofit.
51.
by fifteenforty 4y ago
Correct. It’s not purely for heating.
52.
by fifteenforty 4y ago
This is not only about surface disinfection. 222nm UV is showing great promise for air disinfection. It’s an alternative to traditional filtration and ventilation. Of course, being a COVID-19 related electronic thing, there are lots of sham
53.
by fifteenforty 4y ago
100% on the fume extractor. Avoid the cheap little "carbon filter" models though. You need particulate filtration and a bit of organic vapour extraction, so HEPA +/- carbon if you are going to recirculate it within your work
54.
by fifteenforty 4y ago
They used to be common on USB cables, especially USB A to B cables for printers. Not sure why they disappeared.
55.
by fifteenforty 4y ago
Gravox is the best. I wish I could find it in San Francisco.
56.
by fifteenforty 4y ago
It's completely outrageous and there is still no momentum to undo it.
57.
by fifteenforty 4y ago
Recently discussed on Hacker News was this article: https://khronokernel.github.io/macos/2021/11/22/PCIE-ETHERNE... I’ve had MUCH better results with the Belkin Thunderbolt 3 Express Dock HD (INtel i210)
58.
by fifteenforty 5y ago
I suspect that’s exactly the problem. Cloth masks are often less breathable than N95s!
59.
by fifteenforty 5y ago
Was that a cup style one? Depending on your facial shape, they can be very uncomfortable. Try a 3M Aura flat fold. Life changing for most healthcare workers.
60.
by fifteenforty 5y ago
Have you tried her in an N95?

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