Master Spec Master Spec (Microsoft Word Documents) Section 220716 - Plumbing Equipment Insulation Section 220719 - Plumbing Piping Insulation Section 230713 - Duct Insulation Section 230716 - HVAC Equipment Insulation Section 230719 - HVAC Piping Insulation Master Spec (PDF Documents) Section 220716 - Plumbing Equipment Insulation Section 220719 - Plumbing Piping Insulation Section 230713 - Duct Insulation Section 230716 - HVAC Equipment Insulation Section 230719 - HVAC Piping Insulation