vojtas1985 wrote: Hi
Quickly found in the archives - for comparison

...
Thanks, you see, and these are some numbers

Assuming such savings as in your example, our heating costs would be about 4.3, i.e. +/- it coincides with the costs mentioned by
@jdubowski.
Counting further, both blocks have an area of approximately 9,650 m2, assuming savings on heating the meter of 5.90 - 4.30 = 1.60, which for both blocks gives us about 15,400 per month - which is what the maximum installment of the loan would have to be, so that at least in theory the investment made sense. Let's say a loan for 5 years, the first loan calculator gives about 750,000. The manager mentioned the quoted boiler room for 30 apartments with a cost of 150,000, so theoretically we are within the budget ...
For 5 years we break clean, then theoretically we are 25% ahead, as long as the difference in the price of gas to the price of heat from PEC does not change and until renovations are needed, as
@Inkwizycja wrote about ...
A little saving compared to the amount of unknowns and risks along the way...
According to the manager's example, after paying off the loan, that community will be about 50% cheaper than the neighboring one heated with PEC, so we have a 25% turnout.
We have another meeting in a week, if my thick finger estimation above is confirmed, it seems to me that there is no point in going into it.
Added after 36 [minutes]: It's smart to listen to it
sylba wrote: Heat allocators, as the name says, are used to determine the method of dividing heating costs, but as such they do not reduce heat consumption. Potential savings result from a change in the behavior of users, especially those who were heating up a lot before installing the allocators.
This is exactly what I gave as an argument for allocators, the rising price of heat is one thing, and the behavior of residents is another. The blocks are old, some residents have been living in them from the beginning, even when they were factory blocks, and it is difficult to change their habits just by talking. In addition, not all of them are owners and belong to the community, a large part of the apartments belongs to a guy who bought them from the trustee after the bankruptcy of the plant and now rents them to old tenants and these, firstly, do not care about anything because it is not their apartment and secondly, they always heated it so the same and now they will be because "what will you do to us".
About 5 years ago we insulated the block - before that there was asbestos and it was cold in the corner rooms, even for me. After warming up, the heat consumption was supposed to drop, and somehow it didn't, and I see a big difference in temperature.
sylba wrote: What you write about users' feelings - one warm, the other cold, is: i) the result of individual preferences; ii) the location of the apartment in the building (apartments located in the middle of a block of flats have a lower heat demand than those located at the gable walls or on the top floor);
You're right, with us practically every apartment is to some extent "corner" - the block consists of 2 parts of 4 apartments, connected by a staircase. In addition, there is free space above the top floor (injection-insulated), so the apartments are not directly adjacent to the roof. There is one apartment adapted from the attic and there, in fact, not only are the windows facing north, but there is also a direct roof.
sylba wrote: iii) poorly functioning installation - poor distribution of heat to individual apartments.
It really seems to me that some inventory would be useful here, some of the apartments still have old cast-iron radiators, and some are replaced by new ones by the tenants. In addition, some of them are eliminated, usually e.g. in kitchens where there is no point in leaving the radiator behind the cabinet when fitted with furniture. Some also liquidated in bathrooms "because they did not heat". I myself have 4 heaters out of 6 left in the apartment and I use only 3 in the coldest weather.
sylba wrote: You have no influence on the feelings of users, but you can charge those who consume more heat with higher fees for the heat consumed - allocators or, even better, heat meters can help here. However, there will soon be an indignation of those who have flats that consume more heat because they are worse situated in a block of flats. In this situation, there is no simple answer and no simple solution, only a compromise.
This is always problematic, although, first of all, different correction parameters are adopted for different apartment locations, and secondly, there is no need to immediately settle the divisors in the ratio of 50/50, you can assume 70/30 or 80/20, then the differences between the residents will not be so large and for some residents it will have a motivating effect.
As for the heat meters themselves, it is out of the question due to the price, our installation is "vertical" and on average there would be 4-6 devices for each apartment...
sylba wrote: Just changing the heat source from msc to gas will not change anything from the point of view of heat demand. You can check whether you will pay less by comparing the amount of heat consumed per month and its price with the cost you will incur for the same amount of heat generated in the gas boiler room, including the outlays for replacing the heat source. In my opinion, the first step is to review and assess the functioning of the central heating and hot water installation and only then plan further steps on this basis.
I have the same feeling after the calculations in the previous answer. If heating with gas was actually so cheap compared to heat from PEC, then every second block would have such boiler rooms...