The Airaid # AR523-284 you were looking at for your 2013 Nissan Armada is actually an open air system, because the unit is not fully encased.
The main advantage that the open box systems have over the enclosed box system is that open systems offer the maximum amount of airflow. The enclosed box systems will still have plenty of air flow, just not as much as an open box system. The closed air systems will look like the picture I have linked to this page for your convenience.
Another main... view full answer...
The Furrion Chill RV Air Conditioner System # FR92PR does not come with a heat strip. To add one to your system you need the Heat Strip Add-On # FR27PR which is designed specifically for your manual system. view full answer...
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