Navien LCB700 Blue Flame 21kW LCX Outdoor Combi Oil Boiler hide-price The TELL Class I rating

The TELL Class I rating applies to TRV4 Classic and TRV4 White only

useful during boiler servicing or as a secondary heat source

Creates minimal floor height increase – ideal for renovations

Where is the best position to install the 502649 on a heating system

Outdoor weather compensation ready

Navien LCB700 Blue Flame 21kW LCX Outdoor Combi Oil Boiler hide-price The TELL Class I ratingThe Navien LCB700 Blue Flame 21kW LCX is an external, floor standing oil combi boiler, sited outside the building envelope in a weatherproof enclosure. Built around Blue Flame combustion technology and stainless steel heat exchangers, it was the first oil boiler on the UK market to offer an A+ energy rating when combined with three Smart Plus room thermostats, and achieves the highest 3 star DHW performance mark under EN Regulations. 21kW Heat Output