Statistics comparing a Conditioned Crawl Space to a Vented Crawlspace

.10-25% higher energy use 

. cold floors increase heating demand 

. 15-20% reduction HVAC energy savings

. up to 25% savings in cold climates 

high risk of mold growth in humid seasons 

and increased contribution to indoor air contamination

mold growth risk reduced 70-90% 

stable humidity level of 45-60%