Simple digital solution for buildings energy efficiency estimations

With rising energy demands and environmental challenges, the need for energy efficiency becomes urgent. This paper presents a user-friendly, simple digital tool for evaluating energy-saving measures in private buildings, including lighting upgrades, insulation of walls and roof, window replacements, and energy-efficient appliances. The tool estimates energy and financial savings and calculates key financial indicators such as payback period (PBP), net present value (NPV), and internal rate of return (IRR). It aims to support informed decision-making by offering personalised recommendations and scenario comparisons. The developed tool promotes sustainability and cost-effective energy use across diverse building types.