Yes, an HVAC system can replace a boiler. An HVAC system is a combination of heating, ventilation, and air conditioning equipment that is designed to provide comfortable indoor temperatures and air quality. An HVAC system can provide both heating and cooling, while a boiler is typically used to provide heating only. When replacing a boiler with an HVAC system, it is important to consider the size of the space, the type of fuel used, and the desired temperature range. Additionally, an HVAC system may require additional ductwork or other modifications to the existing infrastructure.