The article discusses important aspects of transforming and designing gas-fired boilers to ensure their safe and reliable operation. It covers topics like the conditions of the boiler house, selecting and setting pressure regulators, gas metering, and designing the gas network. The main goal is to address common challenges faced during the transformation and design of gas boilers. The key findings emphasize the importance of considering site conditions, proper pressure regulation, accurate gas metering, and a well-designed gas network to ensure the safe and reliable functioning of gas-fired boilers.