Comments by "eDoc2020" (@eDoc2020) on "JerryRigEverything" channel.

  1.  @BenIsInSweden  That other commenter is a troll. On paper R32 performs a few percent better than R410A.
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  2.  @zack9912000  A refrigerant line that leaks over time doesn't cause an explosion, the gas will have plenty of time to dissipate before reaching the explosive level.
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  3.  @delavega92  If the power plant is solely gas-powered you probably end up with 30-40% efficiency by the time it enters your home as electricity. Multiply that by an average COP of 3 and you end up with around 100% net efficiency. It's about even. The real benefit comes when some of the electricity comes from other sources. As the grid becomes cleaner the heat pump system becomes better but the furnace will be stuck burning gas at 96% efficiency.
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  4.  @chrisarnone7896  Linemen need to ground out lines before working on them. If they do this and someone is backfeeding there will be a bit of an arc and then your equipment will be forced to shut off (either gracefully or by self-destructing). If you are trying to backfeed an entire town this will happen before the lineman arrives but if there is an open circuit fault near you your equipment could possibly still power you and a few neighbors.
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  5. Since a heat pump is 90% the same as an AC unit it should last just as long. Calendar life is less because you will run it in the winter instead of just the summer. Modern inverter units should have longer life than a conventional AC on the mechanical bits but the electronics could fail. Fortunately electronics are cheaper and easier to fix/swap than the sealed system.
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  6.  @ddnmd  I'm sure a properly maintained 4 stroke gas model doesn't smoke but some of the ones seen in the video certainly do. As for trail side repairs, wouldn't a dino fuel machine also have issues you couldn't fix on the trail? How many people on the trail carry around spare parts and a full toolkit? My gut feeling is most failures would be on parts which are separate from the engine.
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  7.  @ddnmd  My point about repairs is that all of the items you mentioned are either parts specific to the gas engine or are also present in electric ones. The are practical reasons to go with gas over electric (namely range and weight) but I don't see trailside repairability as one of them.
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  8.  @BladeStar420  Working inside batteries is dangerous. EV batteries have built-in safety contactors and other features so the chance of electric shock is minimal. It's more likely to hurt you by crushing you.
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  9. Zack has dirt cheap electricity in Utah, I'm sure he'll be saving lots of money. Obviously your electric rates will go up significantly, but your existing heating system also costs money to use. I'm also in MA and by my calculations on current utility rates a heat pump should be about 30-50% more expensive than gas if you use it the entire year. Since heating oil is more expensive than gas your heat pump should be saving you money if it's properly sized and installed.
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  10. IMO easily recyclable recycled plastic is better than glass. When making glass, even recycled glass, you need a lot of energy to heat the material to melting and you often need much more material. Basic plastics can be remelted without much energy input.
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  11. "If the cost is anything similar to Tesla" -> with other brands third parties can easily service the car and you should be able to replace the battery in sections instead of needing to replace the entire car battery if a single cell goes bad.
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  12.  @mikolajwojnicki2169  The outdoor fan is shut off during defrost. All the heating goes into the ice and it doesn't get blown away like it would during the summer.
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  13. I wonder what it would take to fool the facial recognition. Will a life-sized face printout work (since the cameras might only be detecting depth and thus size)? If not, how about the picture wrapped around a football or other round object?
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  14. That was supposed to be the case but all the split units I can find online are still 410A. I think they've pushed it off until the end of this year.
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  15. Of course Teslas are more expensive, they're a luxury brand. The only reason EVs are expensive is the battery. Without the battery they should actually be cheaper than ICE vehicles.
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  16. 2kWh/day is equivalent to a constant 83 watt load. That's about what a single refrigerator uses. I could see a very efficient home using 5kWh/day.
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  17.  @DooMMasteR  My refrigerator uses about 160 watts when running, I already accounted for the partial duty cycle. The OP was talking about the days when incandescent lights were the norm so anything more efficient than a typical 1990s refrigerator is not a fair comparison.
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  18.  @DooMMasteR  I just checked the "Energy Guide" sticker on a mini-freezer from 2001 and it is rated at 321 kWh/year. I also looked at the Home Depot website and their top seller refrigerator (GNE27JYMFS) is rated 633 kWh/year. Their top-selling top-mounted freezer model (LHTNS2403S) is rated 417 kWh/year. Both these brand-new new models are Energy-Star rated. Can you please explain where your 150-250 kWh/year figure comes from?
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  19.  @DooMMasteR  30kWh/day is a lot in absolute terms but keep in mind it's a national average which is impacted by high users. The South lives on air conditioning and electric heat. Even when electric heating is by heat pump it's a ton of energy.
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  20. Obviously yes but don't worry about it. I'm sure any half-normal driving will keep the battery charged up.
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  21. The electric car's charger is not connected to the transfer switch.
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  22. The whole appeal of hydrogen fuel cell vehicles is that they can be refueled quickly. If you create hydrogen via electrolysis on demand you lose the speed advantage but are stuck with the large inefficiency of the electricity->hydrogen->electricity process. Batteries would make more sense.
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  23. Light bulb is acceptable for lamps shaped similarly to plant bulbs. Old-school A19s are bulbs but fluorescent tubes are not.
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  24. He already has an extra electric motor and battery on the trailer :) A somewhat practical thing to do is to put an extra battery on a trailer and parallel it with the vehicle's main battery. It requires special know-how but when done properly it just acts like one double-sized battery. I've seen a video where somebody did this with a RAV4 EV.
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  25. I doubt they're using 16-bit integers in their code.
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  26. An electric motor is typically lighter than a gas engine of comparable power, especially if you consider transmissions and such. Plus EVs usually have heavy batteries under the body.
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  27. Do you mean they're worse at dehumidification? That is often the case by default but most can be adjusted for more moisture removal.
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  28. I used to have (and probably still have somewhere) a translucent flexible PC keyboard. It was called "virtually indestructible" and ironically it was already broken when I bought it.
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  29. Unfortunately I think the high-tech dashboard is pretty standard among all types of new cars.
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  30. IMO your reasoning is wrong. Heat pumps are best when there's minimal heating needs and and gas furnaces are often better when it's regularly very cold.
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  31. If you're talking about a version of Opera after 12 it's just Google Chrome with some tweaks. There's no reason it shouldn't work.
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  32. I'd be very surprised if there wasn't a tree with a Tesla charger. Having said that, it's not something you'd be very likely to come across in the wild.
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  33. No, a condensing furnace needs plastic vents. A lower efficiency furnace requires metal vents.
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  34. I'd like to inform you that your extension cord melted because of a poor connection, NOT from the wire thickness. The length of a wire has nothing to do with how much current it can handle without overheating. Instead, thicker wire is needed over long distances because excessive voltage drop can prevent devices from functioning properly.
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  35. Relatively little I'd guess. AFAIK the main range reduction in the cold is from running the heater. This will be insignificant compared to the range loss from pulling the non-aerodynamic trailer.
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  36.  @kierank01  It makes sense when you consider that propane is running at over 100x the pressure when used as a refrigerant.
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  37.  @zack9912000  R290 won't be in split systems but it can work great for "monobloc" systems where all the refrigerant is contained inside the outside unit. This also has the huge benefit that installers don't need to work with fiddly refrigerant lines. Instead these units transfer the heat by pumping a glycol solution to the indoor coils.
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  38. We're almost there. You can get basic 12v 200ah LiFePO4 packs for under $500, that's only $200/kWh. Now I'm realizing that meets your price point exactly. Problem is you still need an appropriate inverter which is at least $1k on the low end. And those cheap components probably don't have all the needed approvals for a fixed installation. For a DIY "portable" system you could definitely get a complete $6k which is not terrible.
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  39. I've never heard of a 48 amp EVSE. I've only seen 32 amp ones here in the US. I don't think many cars can charge faster than that.
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  40.  @harishvora1741  I disagree, it actually could be a nice marketable feature. About 1kW of panels fits on a car and assuming 6 hours of strong sun per day would provide enough energy for the average EV to travel around 19 miles or 30km.
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  41. Both ducted and mini-splits are placed on the same scale. Ducted systems require large circulation fans and thus are always less efficient than an equivalent ductless unit. Also it just isn't a particularly great performing unit.
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  42.  @noahstuart3025  Hydrogen combustion engines would just put out more water than FCEVs because they consume more hydrogen.
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  43. That's stupid. I can't imagine why they'd do that. On the practical side, nobody "ever" reads the terms of use and there's no way for them to even know what type of device is connected.
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  44. I've heard that bleach can be used to return water-damage indicators to white. Maybe acetone does the same. Or actually, I don't think acetone bottles contain any water. The lack of water could be another reason why the indicators are still white.
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  45. Most of the heat is coming from outside. When the unit is operating at a COP of 3 it means twice as much heat is coming from outside compared to from the compressor itself.
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  46.  @rosegold7975  And that's one reason why short-cycling is bad. If you have proper run times the startup losses do mot have a large impact.
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  47. These were designed to ruin without doors. It's not the same as cutting the doors off a Corolla.
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  48. There is a slight breeze and some noise. In a properly sized system you won't feel a breeze unless you're directly next to a vent. The noise level is also quite low unless the vents are overloaded.
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  49. I'd guesstimate 5-15k for the main equipment. The extra equipment like the transfer panel and wiring is probably another grand or two and then labor/installation costs will vary greatly depending on region and contractor.
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  50. For city driving I don't think it will be bad.
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