The program calculates the required amount of insulation on the specified size (area and thickness) of insulation, the insulation on the basis of said sizes. Possible calculation sheet and coil insulation.
When the value of an unknown insulation pack, you can enter the value of cubic meters insulation and the program will calculate the cost of one pack.

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P.S.
If the application is taken off, write a letter to the developer with an indication of the sequence of actions that led to the departure.
If you write a negative review, with regards to the correctness of payments, be kind to justify specifying original data and you received an alternative calculation result.