Filter Replacement for ComfoAir 350 & 550 Heat Recovery

Watch our step-by step videos on how to replace the heat recovery filters in our Zehnder ComfoAir 350 and 550 Heat Recovery Units. Filter replacement is crucial to long term comfort in the home. Visit www.greenwood.co.uk to register for filter reminders

[@pivertd]

Hi, how do we know which side is the G4 and which side is the F7 on the Left & Right models ?

[@dars3530]

must be the left one , the dirty one

[@AF-hh1pk]

The reason why most videos won't share which side should have the Merv 13 is because comfoair350 comes with a left handed and a right handed model. If it's a left handed, ComfoAir 350 - LEFT
, return and supply air is on the left side (when the filter covers are facing you), so you put the Merv 13 on the left side. Some comments might have the return and exhaust mixed up, but return and supply are on the left, while exhaust and outside air are on the right. Your comfoair should have a label that tell you if its a comfoair350 "L" or "R". You can also tell if your ComfoAir 350 is a LEFT handed version if you find the condensation valve at the bottom is on the RIGHT. Confusing right?