Savings Calculator and operating costs of home heat pump DHP

Calculator based on the dimensions of the area to put the panels and occupancy data on number of panels in one package, calculate how much you have to buy packages of panels to cover the entire room.                          

Calculator to estimate the necessary amount of wallpaper needed to wytapetowania room of the given dimensions.    

The calculator calculates the amount of VAT that can be refunded in respect of incurred expenses associated with the purchase of construction materials.