Variations in temp may be noticed only on a subconscious level

nSpot checks are OK, but data-logging is a powerful tool

n

Olesen, B.W., “Guidelines for Comfort”, ASHRAE Journal, August 2000; (a Peer-Reviewed, Practical Guide)

Fang, L., et al, “Temperature and Humidity: Important Factors for Perception of Air Quality and for Ventilation Requirements”, 2000. ASHRAE Transactions: Symposia MN-00-4-3 (from the Summer Annual Meeting in Minneapolis)

In Canadian public schools, 20% reduction in absenteeism in all schools when RH was increased from 20% to 35%

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

s

 

 

 

: ee:Green, G.H., "Indoor Relative Humidity in Winter and the Related Absenteeisms", 1985. ASHRAE Transactions CH-85-13-3 (RP-397)

Outdoor air at 0°F and 50% RH, heated to 70°F yields 3% RH

 

 

 

Sahara Desert:  average 25% RH