Should you eliminate district heating in favor of gas?

Hello. I bought a house with such a substation (only what) Since the whole house is to be renovated, I assumed in advance that this node would also be. Without going into irrelevant details, we decided to give up district heating and install two gas boilers (one for every second for hot water) My friend looked at this node and asked if it was better to use it for a year or two and see how it works and what heating costs, and if it will not fit, insert the boiler and the game. Or maybe I will be satisfied with district heating. And now the question. Is this node "worth something" and if so, is it possible to connect the modernized what to it without any problems?

Listen to a friend.

In fact, find out what are the costs of heat supply, because you will have to sign a contract with the supplier. Ask your neighbors about the real costs of having the same system and a similar house. Only then can you calculate whether it makes sense.

Heating from the municipal network will be cheaper than gas heating (comparable in costs to individual coal heating), but the heating season is imposed - usually too long (but in an individual house it is not a problem, because you can turn off the node and not have forced heating in May) . By the way, this exchanger is strangely small.

The contract with the supplier is already signed, but without ordering power. The price of GJ is PLN 80. If you ordered power, the price would be about PLN 60. Talking to your neighbors only creates more unknowns. Everyone praises, but the discrepancy in prices is huge. In a way, it's understandable because I have friends at home who have 23 and others 18 degrees. Generally speaking, it is just a question of resolving the issue of whether this knot is suitable for further use without any modifications? If so then I don't think at all and leave the knot for 2-3 seasons to see. I threw a question here because I'm afraid that when I call the "knot specialist" it sticks to me

What power is this exchanger.
Which means "if you order power .... PLN 60).
What are the annual "power" fees. Other subscription fees.

And what is this house? What area, how insulated, etc.

A knot in good condition, it is enough to insulate it or not and to have room heating (I don't see the pump, just an empty place?). As for the amount of heat in single-family houses, these are indeterminate I know people who don't count with costs and people who only heat one room The plate exchanger will last for about 20 years, the SYR1915 safety valve will start to leak after about 5 years. You can set up one more CD plus eg AVTB and it has hot water. There are no problems with inspections, etc., as in the case of gas boilers.
A single-unit tariff is a good solution as long as you do not exceed the permissible power.

The approximate cost of 1GJ from the municipal network is PLN 45

1GJ = 277kwh
1m3 of gas calorific value = 10kwh

1kwh from gas = 20 groszy
1kwh from the network = 16.3 pennies.

To sum up - you will have a higher energy cost for gas and, in addition, you will have to incur an investment of PLN 10,000. So the idea sucks and the friend is right

Added after 28 [minutes]:

I read the price you gave and wrote what I pay in the block. Anyway, switching to gas is not worth it. How many gj would you have to declare to have 60 PLN each?

friends don't listen, calculate the price for 1kwh from both sources. 1m3 gas is 2 PLN and you will get max 10kwh from 1m3 with underfloor heating. If you heat the heaters with gas at 65c, you will probably get 9kwh.

@Arbiter you only pay for GJ? No recurring fees? for power?

I still pay for the heating of the common parts in the block, but I don't know how the author of the thread pays. He would have to write if he has any subscriptions etc.

Added after 1 [minutes]:

when I look at the photo of this knot it looks really nice. And this on the side is a hot water heater?

I answer wholesale:

As for the price, I only pay for consumption. Therefore, the cost is PLN 80 per GJ. If I order power, I pay less, but when I use less, I still have to pay for the ordered one. At the moment, the house is not used, the node is turned off, so there are no costs.
Currently, the house is about 220 m2 and an extension to 300 m2 is planned. Currently, one and a half brick, planned polystyrene insulation plus new windows and doors.
I do not know what the exchanger's power is and currently I cannot check it.

The elements of the node are 5 years old. The pump is under the water meter, but I can't see SYR1915. Domestic hot water heating is omitted due to problems with keeping heat in the summer (which was surprisingly confirmed by the supplier). A seal is placed on a valve, which prevents exceeding the permissible power.

This is how this Junkers on the side heats the hot tap water

Generally, at the moment the decision is that the node stays and you will see it. It is true that the renovation begins somewhere in the middle of the year, which is still a lot of time and may change a lot until then.

I removed the insulation from the exchanger and there the APV OHC15 / 30 AE. Google says it's 40 kW. Isn't it too much to heat a house like this?

If the exchanger is too big - it is okay. worse if it was too small (unlike the boiler)

you probably have a throttled water flow to limit the power output.
The supplier does not supply heat in the summer? What is this company?

I guess that's what it's all about.
As for the summer, it is an estate of single-family houses built 30 years ago. Then everyone was connected to the mains and it was ok. Over time, people gave up and started to heat the water on their own. In addition, it is some kind of end of the network and therefore there is a problem in summer. It's about GPEC Gdańsk.

Syr1915 is the valve from which the green hose comes out to the drain.

Basically I would stay with the working system.
I found their price list
http://www.gpec.pl/klient/cennik_oplat_taryfa_dla_ciepla/

For the summer period, I would install the DHW + G12 heat pump

wnoto wrote:

For the summer period, I would install the DHW + G12 heat pump

and waited 10 years for ROI, hoping it would even occur before the pump pulled out the hooves?
It is probably not a good idea.

You can see that the author has gas, so either a gas or electric boiler - the easiest and the cheapest

As for the hot water, there is no choice (I think). Gas boiler + large container + collectors .... because of 10 bathrooms

Arbiter wrote:

wnoto wrote:

For the summer period, I would install the DHW + G12 heat pump

and waited 10 years for ROI, hoping it would even occur before the pump pulled out the hooves?
It is probably not a good idea.

You can see that the author has gas, so either a gas or electric boiler - the easiest and the cheapest

It all depends on your hot water consumption ....
these 10 bathrooms are serious?

Most seriously.

Then try to estimate the amount of hot water needed to be "produced". It is worth considering the domestic hot water installation.
Heating. CO are radiators or underfloor heating? (what will ultimately be - you wrote about the renovation)

When setting up the thread, I just meant to evaluate this node. I already know that I can easily use it without expensive modifications. If the price is comparable to gas, I will be happy, if it is cheaper - it will be great. As for the domestic hot water, the discussion does not make sense because the gas boiler + collectors is a system that I tested and I know that it will work best in my conditions. If everything goes according to plan, the building should already be in use for at least part of next season. Then I will write something more about the ratio of heating costs to the surface area, because it's hard to find anything on the Internet about this topic. I greet everyone and thank you for your advice.

Maybe I will add a little on the topic: I have a house of 280 m2 heated with gas, my son's father-in-law has a house of 220 m2 (both houses are solidly insulated, new windows) heated from the municipal network and I pay (annually) much less, Zacisze (Targówek / Warsaw) many houses (terraced houses) it used to be heated from the municipal network, now practically none (gas in every house), I think it gives food for thought. If you have your boiler room, you heat it when you want, another construction project in the family is planned, the house will certainly be heated with gas, I will add that a furnace with flame modulation and a good dedicated room regulator is the basis.

@cirrostrato I am of the same opinion, although I do not know where it came from, since so far I did not know anyone who would use heat from the network. Maybe the places that are dry during the winter, indicating the route of the network, and think about the huge losses in this installation. I had an opportunity to compare these two methods of heating on my own example and, if only out of pure human curiosity, I will do it because it will not cost me anything. Well, maybe except for bigger heating bills for two or three seasons.