(i) The single duct unit draws in more outside air than it delivers cools air to the conditioned space. This means it will never cool other than if you are directly in front of the unit. Thats what the negative pressure comment is about
(ii) A double duct unit draws condenser air in from outside and discharges hot air (thats where the work is done) to outside the building. This is proper engineering practice. Less energy cost overall and hugely more efficient
(iii) Never buy a single duct unit
Return to Cargo Trailer Conversions
Users browsing this forum: No registered users and 6 guests