tgma 15 days ago

Heat pump sure, but how is gas furnace more efficient than resistive load inside the house? Do you mean more economical rather than more efficient (due to gas being much cheaper/unit of energy)?

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  • meatmanek 15 days ago

    Depends where your electricity comes from. If you're burning fossil fuels to make electricity, that's only about 40% efficient, so you need to burn 2.5x as much fuel to get the same amount of heat into the house.

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    • tgma 15 days ago

      Sure. That has nothing to do with the efficiency of your system though. As far as you are concerned this is about your electricity consumption for the home server vs gas consumption. In that sense resistive heat inside the home is 100% efficient compared to gas furnace; the fuel cost might be lower on the latter.

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      • mlyle 15 days ago

        Sure, it's "equally efficient" if you ignore the inefficient thing that is done outside where you draw the system box, directly in proportion to how much you do it.

        Heating my house with a giant diesel-powered radiant heater from across the street is infinitely efficient, too, since I use no power in my house.

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    • devmor 15 days ago

      It’d be fun to actually calculate this efficiency. My local power is mostly nuclear so I wonder how that works out.

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  • fulafel 14 days ago

    You accelerate the climate catastrophe so there's less need for heating in the long run.

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Tade0 15 days ago

I'm in the market for an oven right now and 230V/16A is the voltage/current the one I'll probably be getting operates under.

At 90°C you can do sous vide, so basically use that waste heat entirely.

For such temperatures you'd need a CO2 heat pump, which is still expensive. I don't know about gas, as I don't even have a line to my place.

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  • _zoltan_ 15 days ago

    90C for sous vide??? You're going to kill any meal at 90.

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    • Tade0 14 days ago

      Make it "up to 90°C". 5th quarter meats are better done in the higher end of sous vide temperatures.

      Point being, you can throttle your equipment to the desired temperature and use that energy effectively.

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  • mewpmewp2 15 days ago

    How can you bear to eat sous vide though? I've tried it for months and years, and I still find it troublesome. So mushy, nothing enjoy.

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    • SAI_Peregrinus 15 days ago

      Did you skip searing it after sous vide? Did you sous vide it to the "instantly kill all bacteria" temperature (145°F for steak) thereby overcooking & destroying it, or did you sous vide to a lower temperature (at most 125°F) so that it'd reach a medium-rare 130°F-140°F after searing & carryover cooking during resting? It should have a nice seared crust, and the inside absolutely shouldn't be mushy.

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    • brookst 14 days ago

      Please research this. Done right, sous vide is amazing. But it is almost never the only technique used. Just like when you slow roast a prime rib at 200f, you MUST sear to get Maillard reaction and a satisfying texture.

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