Doors and windows manufactured from UPVC are distinguished by their high thermal insulation ability, superior to aluminum and wood, due to the small value of the thermal conductivity coefficient of UPVC, which leads to raising the level of cooling or heating efficiency inside the room. This also helps in saving the energy used in cooling and heating, and thus saving the use of Electricity at a rate lower than usual by approximately 28%. In addition, Sidal Windows excels in choosing high-thickness sections and multiple internal 

.insulation chambers