Many system boilers and most regular boilers on the market today require additional work to make them compatible with the energy saving devices included in Boiler Plus. This may involve additional costs and additional knowledge for the installer, without which there may be a risk of Legionella. While there is still benefit to be derived from installing these measures in heat only and system boilers, the health and safety of householders is paramount and no such risk should be tolerated. It makes sense to first apply the new standards in systems where there is no risk, without any additional work, and consider extending the rules in the future when installers and manufacturers have time to adapt.