Duncan's Heating and Cooling/Niagra Industrial Mec Duncan's Heating and Cooling/Niagra Industrial Mec Search | Advanced Search | New Members | Coupons and Discounts | All Categories Other >> Contractor & Sub-Contractor >> HVAC Duncan's Heating and Cooling/Niagra Industrial Mec P.O. Box 60Ransomville, NY 14131 | View on Google Maps Duane Duncan (716) 791-9952 Member Since: 2009