The second biggest source if heat in the front if my Axis is from the fan vent. If you stand under the vent on a hot day, you can just feel the heat radiate down on your head. Camping World (and I am sure others) sell a vent cushion for around $10 that fits up into the 14" square vent and keeps most of the heat from coming in. For those who want to try it or don't want to spend the $10-20, the small couch cushions provided by Thor fit fight up into the vent and do the same thing.
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