IES removed all air duct insulation (attic and crawl space); cleaned, sealed and re-insulated all ducts; removed all crawl-space insulation; removed mold, cleaned/sealed floor/joists, installed new insulation; sealed crawl space from ground and outside; added fresh air supply to HVAC system and supply air to crawl space; sealed and added new insulation to attic. House dust and odors have been eliminated, and cooling costs for the 3 HVAC systems have been cut in half. IES provided a significant credit for finishing the job sooner than anticipated. Work crew was very responsive. IES staff was very knowledgeable and helpful.