An example of heating a house with electricity for 1700 rubles in the winter month

The article This electric heating scheme is cheaper than gas heating one of the readers wrote a very interesting comment about his experience of heating a house with electricity:

The VT that he uses is similar to an electric convector, but with increased depth. The author of the comment did not write what the house was built of, but it is clear that under the window there is a recess where the TN fits. Probably, the house was built immediately taking into account the heating by these heat pumps.

To simplify everything, the heating scheme looks like a stove. You also heat the stove in the house, heating it 1-2 times a day (depending on the temperature outside and the heat loss at home). And the author of the comment has several such mini-ovens, but with heating and heat accumulation from electricity.

I propose to see what this miracle installation is. The equipment used by the author of the commentary is of Russian-German production (Tagil-Technotherm). It has been produced in Germany for a long time:

Inside the box, judging by the description, there are thermally insulated magnesite blocks. They are the ones used, since have a slightly higher heat capacity than fireclay refractory bricks. What kind of heater was used - I did not find information, but probably some high-temperature heating elements. The blocks heat up to 650 degrees. Also, the design has a silent fan for creating a convection flow and a thermal relay.

But for energy-efficient heating, these heat pumps need automation with an outdoor and indoor temperature sensor. With a simple algorithm. If it is warm outside, then it is not required to store much heat in the heat pump. There will be less power consumption. It is precisely because of the use of the controller that the author of the comment has such small figures for heating costs. And if you stock up to the maximum, then here is an approximate calculation:

TH accumulates heat for 8 hours. Let's say we use a heat pump of 3 kW power. There are 4 of them in a small house. (for TU 15kW, 380V). Runs on 96 kWh per day. Per month: 2880 kWh. At its night rate 1.23 rubles / kW * h, we get: 3542 rubles / month. for heating. Even if you heat them to the maximum, then these are not such large costs for the winter month. But with automation (controller), these costs, I think, can be reduced by 1.5-2 times.

It makes sense to use such equipment for heating, as mentioned in the comment above, only if there is a night rate. Store heat in the heat pump and give it away during the rest of the day like a wood stove.

Well, now about the prices for this equipment. Some companies sell TN at the following price:

Expensive. But there are also cheaper offers (third slide) - 15 thousand. rub. It is necessary to consider the payback period in comparison with other heating schemes. But at a price of 15 thousand / piece, two-tariff electricity consumption, a thermos house (passive house, as they say) - this idea becomes interesting.

I looked for information further. There are two types of such VTs: static (without a fan) and dynamic:

You can read about its effectiveness here: https://mastergrad.com/forums/t226202-magnezitovye-akkumulyatory-tepla-nochnye-teploakkumulyatory

Review of the TN owner from the north of Portugal and his savings in numbers. Unfortunately, this equipment is not widespread in Russia as in the West. Heating with gas there, as you can see, is much more expensive than electricity at night.

Of course, you can heat with wood, coal or connect gas for 300, 500, 700 thousand. rubles, or even higher (and if there is no such budget?). And, as you can see, there are other methods of low-cost heating, you just need to see them and make sure yourself by making calculations in your region.

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Photos are taken from open sources, from Yandex. Pictures

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