TY JOUR TI ECONOMIC CONDITIONS FOR SMART BUILDINGS IMPLEMENTATION IN REGIONS WITH LOW ENERGY TARIFFS: THE CHUVASH REPUBLIC CASE KW smart buildings KW BMS KW BIM KW energy efficiency KW life cycle cost KW energy tariffs KW Chuvash Republic KW regional policy KW NPV KW investment viability JO JOURNAL OF MONETARY ECONOMICS AND MANAGEMENT AU Verendeeva, O.S. AU Abu Mahadi, M.I. PY 2026 IS 0 PB ITBO University