Renovated apartment building in Lentvaris, Church St. 21. Construction installation works were carried out by UAB Kietaviškiai statyba. After the renovation works, the customer of which was UAB „Trakai heat networks”, not only improved the aesthetic appearance of the house, but also issued a certificate establishing the higher energy performance class – B of the building. Prior to the renovation, the building in question was classified as lower – energy performance class E. After renovation, the residents of the apartment building significantly improved their quality of life, reduced heating costs, and when the energy performance class C was reached, the State reimbursed 40 % of the investment amount.