The Zehnder ComfoFond L-Q earth-brine sub-soil heat exchanger uses the relatively constant annual temperature of the earth at a depth of one to one and a half metres. This ‘passive store’ of energy remains at a temperature of 8-12ºC all year round and can be used to temper incoming supply air in winter and summer months.

• Tempered supply air throughout the year
• Designed to integrate easily and effectively with the Zehnder ComfoAir Q heat recovery range
• Operates automatically thanks to its integrated temperature sensor h Ideal for use in high-water table and extremely effective in water bearing sand/gravel and granite soil types
• Exceptional energy efficiency due to utilisation of renewable energy from the ground
• The system is low maintenance and all serviceable parts are easily accessible
• Frost-free permanent operation, even at external temperatures of less than -25ºC
• Zehnder ComfoFond L-Q provides a closed loop system which offers improved hygiene over open loop versions
• The closed loop system offered by Zehnder ComfoFond L-Q delivers lower air resistance than an open loop system leading to lower running costs and enhanced efficiency
• Design and supply from one manufacturer ensures compatibility and ease of integration