That massive spike of 50c/kWh at the left looks tiny compared to today even though that's already insanely expensive
this post was submitted on 05 Jan 2024
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How are you using 21kWh/day heating a small home? Do you have any insulation at all?
Heat pumps aren't designed to function in this low of temperature. The problem is they need a real heater instead of a heat exchanger.
This is such an outdated information. Modern heatpumps work just fine even in temperatures of -20C and below. Ofcourse the efficiency gets worse the colder it is but even at worst it's still 100% efficient. On a typical year there's only a handful of really cold days. It doesn't make sense not to get a heatpump just because it's inefficient for few days. It's not like it stops heating or something. It just effectively turns into electric radiator which is what my house was heated with before I got the heatpump anyways.
Not quite, in my experience on really cold days my heat pump struggles to keep up. This is expecially true when the outside unit is frosting up. The unit has to reverse and pump heat out of the house.
That's one of the reasons i run my wood pellet stove on those days. The secondary source of heat takes the load off the heat pump.
In an area that gets very cold, a geothermal heat pump (which uses the ground rather than the air for heat exchange) would work better than an air-source heat pump. More expensive to install though, and you need a good amount of land
It's basically what modern homes should have built below them. Then it doesn't need extra space. Wonder if it's already enough to put some pipes a meter below the basement?
I’ve got a small 1200w heater that kicks on in the morning to bring the living room space up to 69. I live in a 40 year old house that’s insulated fairly well (I just had the attic redone last year to r-49) and it’s 45f outside right now. That little heater has used 6kWh since kicking on this morning getting the house up from 63f to the near 69 it is now.
On a day below freezing that heater will got for a lot longer through the day to keep temps up.
Space heaters are the way to go.
It's the difference between paying $70 and $5 more per month.
You don't exactly understand heat pumps, do you?
A space heater has an efficiency of close to 100%, heat pumps have at worst 100% and at best somewhere between 300 and 500%. Granted, in -35C environments, it's probably very close to 100%, but that's the absolute worst case, and an anomaly even in Finland.
That's a perfectly normal number for any home that isn't very new and perfectly insulated.
My 37sqm appartment needs approximately 5000 kWh in natural gas per year, 876 kWh last December, so 28 kWh per day on average. The building is admittedly old and not perfectly insulated but it's also not a log cabin out in the open in Finland, but instead a flat enclosed within 3 other flats in the middle of cosy, never below -8C Germany.
21 kWh in a log cabin in Finnland actually seemed pretty low to me. It's sort of obvious OP is using a heat pump and the cabin must really be absolutely tiny.
Why are you measuring natural gas in kWh? How do you even measure that as such?
It's an easy conversion - 1 kWh is equal to 3412 Btus. In Germany, both electricity and natural gas are charged in kWh. I know a fair bit about energy measurement if you have any questions.
This is fascinating to me. How does it factor efficiency, since gas needs to be burned?
It does not factor efficiency at all.
The bill does not care about efficiency.