The Vaillant VR 110 provides an effective solution to assist landlords with legal obligations to their tenants. The VR 110 Annual service timer assists those who have a legal obligation to ensure that annual services and safety checks are carried out on gas appliances installed in their properties.

When correctly installed, the VR 110 flashes after 11 months to indicate that the boiler requires servicing, and if not re-set by a service engineer within 4 weeks, the VR 110 then switches-off the boiler.