ASHRAE 55 - Thermal Comfort - Graphic Comfort Zone Method

[John_187]

Does anyone have experience with the Thermal Comfort - Graphic Comfort Zone Method? The temperature range they suggest to achieve thermal comfort seems inaccurate. See attached link, page 7-8.

That's really my main question. Typical cooling design set points would target 72 as a maximum design temperature. This has 74 as a minimum cooling temperature with 0.5 clo. I know I get really hot when a room is 74, even with a t shirt and shorts. Even at 0.2 m/s air speed, 74 as a minimum seems high.

I am trying to achieve the LEED Thermal Comfort Credit. It can be achieved, and then some, because the target cooling temperatures are lower than listed here. However, I was just curious if someone could provide further insight into this chart.

http://arco-hvac.ir/wp-content/uploads/2015/11/ASHRAE-55-2010.pdf

 

[jrrocks]

The comfort condition usually is temperature range 23-24°C and RH less than 60%. Most of the individual feel comfortable in this condition.

 

[lukaiENG]

I don't see a major problem with the temperatures it shows. I am more than comfortable in shorts and t-shirt in a 74degF / ~60% RH environment. I assume others are too.
The chart also shows the region for fully clothed people going down to ~69 / 80% RH which again I think is reasonable for someone fully clothed.

I'm not familiar with 'using' this method, but in my opinion the regions seem reasonable