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I noticed this same problem you are showing with the air space R-values. The only way I could rationalize their number is that they mention it's 90 deg outside, and 90 deg average for the air space. Would this mean that sometimes the interior space is above 90 deg, therefore there would actually be heat loss from the interior space to the outdoor space. Therefore the direction of heat transfer would be upwards.

[QUOTE="mp57078, post: 7418145, member: 34014"] I noticed this same problem you are showing with the air space R-values. The only way I could rationalize their number is that they mention it's 90 deg outside, and 90 deg average for the air space. Would this mean that sometimes the interior space is above 90 deg, therefore there would actually be heat loss from the interior space to the outdoor space. Therefore the direction of heat transfer would be upwards. [/QUOTE]

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