Installing a full boiler system requires working with piping, electricity and gas lines, so expert help is generally needed. Replacing just the boiler and not the piping or gas line, however, might be reasonable for the inexperienced.
Hot water boilers require extensive piping and pumps. Small mistakes during installation lead to ongoing wasted money, and the cost of reinstalling pipes is expensive. Expert help can allow homeowners to avoid expensive replacements in the future.
The boiler itself requires only a few connections, and careful homeowners might be able to install a boiler successfully. However, care must be given when connecting the gas line and setting up combustion within the unit as even small gas leaks can be dangerous. It's also important to know local law regarding working with gas lines; some areas require homeowners to hire certified experts for anything more than connecting or disconnect a gas appliance.