NRG ZONE 5Open vented system with a boiler as the heat source – the system has four central heating zones or domestic hot water (DHW) zones
NRG ZONE 4Open vented system with an oil boiler and a solid fuel stove, two central heating zones and a domestic hot water (DHW) cylinder
NRG ZONE 4Open vented system with a solid fuel stove and a solar panel as its heat sources, and two radiator zones and a domestic hot water (DHW) cylinder as the load
NRG ZONE 4Open vented system with two solid fuel appliances, two radiator zones and a domestic hot water (DHW) cylinder
NRG ZONE 4Open vented system with two solid fuel appliances, two radiator zones and a domestic hot water (DHW) cylinder
NRG ZONE 5Open vented system with an oil boiler, a solar panel and a solid fuel stove as the heat source
