Check out this video of a customer's state of the art facility under construction. They required an R-8 insulation for the duct work that ran throughout the
48x75 R8 Double Reflective Bubble Duct Insulation
48” X 50' REFLECTIX BUBBLE DUCT WRAP - HVAC Accessories
R8 HVAC Duct Wrap Reflective Insulation 2-Sided Foam Core 4FT X 50FT (Seconds)
Large Duct Insulation Kit 48 X 10' – Save On Energy Kits store
HVAC Insulation Duct - Duct Wrap Insulation - Air Duct
KoolDuct Install Time Lapse, Why use Kingspan KoolDuct
HVAC Duct Insulation Wrap, R8, 4' x 50' (200 Sq Ft)
10000 sqft Super Shield 1/4 Inch Solid Foil Reflective Foam Core 1/4' Insulation Barrier – US Energy Products
REFLECTIX R-8 48X75' BIG BUBBLE HVBB48075
Benefits Of Duct Insulation