That depends on your definition of hard. If you are the type who likes to get your hands dirty and fix issues yourself, then yes, it can be argued that boilers are a little harder to work with than gas furnaces.
That’s because boiler systems make use of hot water and pressurized pipes, and some other scary elements that can be hard to work with. In contrast, it is relatively simpler to find your way around the internal components of a furnace with just an owner’s manual and a few video tutorials.
However, if you are not looking to get your hands dirty, the trouble of maintaining a boiler is the same as trying to maintain any HVAC system. You just need to contact a boiler service Surrey like this one for an inspection once a year to make sure things are working properly. And you need to keep an eye out for any signs that something might be wrong with the boiler.
That’s the same basic level of care you’d need to have with any modern heating system, so it is hard to argue that boilers are harder to maintain than the alternatives.
