Thermobox

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 The Thermobox 150 & 125 is manufactured by Naber in Germany and Blower-Door Certified (required opening pressure >65 Pa). 

· Up to 20 times less heat loss (compared to standard back flow traps)

· Efficient thermal insulation of the exhaust opening

· Heat insulating reflective layer

· Can be retrofitted in existing 125mm ducts

· Innovative opening and closing mechanism

· Blower-Door certified (required opening pressure >65 Pa)

· Magnetic opening and closing

· Defined opening pressure prevents rattling

· Opens fully even at low flow rates

· No vibrations, no rattling noises

This product  can be retrofitted in existing 150mm & 125mm ducts and will open fully even at low flow rates.