The National Institute of Building Sciences (NIBS) through the National Mechanical Insulation Committee (NMIC) has developed the Mechanical Insulation Design Guide (MIDG) to provide a comprehensive source of information on the performance, use, testing and standardization of mechanical insulation in buildings and industrial facilities. The MIDG is continually being improved and updated. Any edits, revisions, updates or interest in adding new information should be directed through the 'Comment' link on the respect page. Disclaimer.

This Update Summary is being provided as a simple guide to provide MIDG users a quick reference of the most recent updates to the applicable MIDG Sections. Minor corrections, as determined by NMIC, may not be included. Users should not rely solely upon this summary to denote all MIDG modifications.

DateMIDG SectionUpdate Summary
12/02/2016ResourcesUpdated manufacturer references
11/28/2016Simple CalculatorsUpdated reference table for Condensation Control Calculator for Horizontal Pipe
09/22/2016Installation and ResourcesUpdated to provide information on new Vimeo portal
06/29/2016Materials and SystemsUpdated section "Polystyrene"
02/23/2015Personnel Protection Calculator for Horizontal PipingUpdated Personnel Protection Calculator to include Microporus insulation.
06/19/2014Simple CalculatorsUpdated Simple Calculators to include additional insulation materials and jacketing choices
03/17/2014Materials and SystemsUpdated section "Product Characteristics of Weather Barriers, Vapor Retarders, and Finishes" - added "combination of polyethylene and" Surlyn"®" (added registered trademark symbol)
03/14/2014ResourcesUpdated section 'Manufacturer by Product Type'
03/10/2014ResourcesAdded Mechanical Insulation Education&Awareness Course to 'Educational Resources' section
03/10/2014ResourcesAdded Mechanical Insulation-Installation Video Series to 'Educational Resources' section
11/04/2013ResourcesUpdated section 'Manufacturer by Product Type'
10/03/2012Materials and SystemsUpdated content in "Product Characteristics of Weather Barriers, Vapor Retarders, and Finishes"
10/03/2012ResourcesUpdated section 'Manufacturer by Product Type'
04/06/2012InstallationUpdated page with revised MICA Plates
03/29/2012SpecificationsAdded new page
03/23/2012E-Learning ModulesAdded new page
03/07/2012Materials and SystemsUpdated information for Flexible Aerogel Insulation
02/23/2012Design ObjectivesUpdated content in Energy Conservation - Financial Considerations
02/15/2012Design ObjectivesAdded figure for cumulative discounted cash flow vs. time
11/02/2011ResourcesUpdated section 'Manufacturer by Product Type'
09/22/2011Design Objectives
Simple Calculators		Added paragraph discussing energy calculators and ASTM C 680.
09/22/2011Design DataCorrection in Table 3.
09/14/2011Simple Heat Flow Calculator and Simple Thickness CalculatorRemoved as information is now included in the other calculators.
08/30/2011Temperature Drop Calculator for Air Ducts and Temperature Drop Calculator for Hydronic PipingNew calculators.
08/16/2011Materials and SystemsAdded ASJ+ designation.
08/09/2011Personnel Protection Calculator for Horizontal PipingNew calculator.
08/09/2011Design Objectives
Simple Calculators		Added new calculator - Personnel Protection Calculator for Horizontal Piping.
07/26/2011Estimate Time to Freezing for Water in an Insulated PipeUpdated calculator.
04/08/2011Energy Calculator for Equipment (Vertical Flat Surfaces)
Energy Calculator for Horizontal Piping		Updated calculators.
04/08/2011Design Objectives
Simple Calculators		Added new calculator - Condensation Control Calculator for Horizontal Pipe.
02/23/2011Simple Calculators
Resources		Updated calculator description and references.
02/14/2011GlossaryUpdated definitions.
12/10/2010Design ObjectivesUpdated text and added new calculators - Energy Calculator for Equipment, Energy Calculator for Horizontal Piping and Mechanical Insulation Financial Calculator.
12/10/2010Simple CalculatorsAdded new page.
09/15/2010IntroductionCorrected error in thickness table for Design Example 1.
05/17/2010Materials and SystemsRevised product definition of Silica Aerogel.
05/17/2010ResourcesAdded product manufacturer lists categorized by product type.
03/30/2010Design ObjectivesAdded condensation control design example.
11/20/2009Design ObjectivesAdded clarifications relative to the simplified energy calculator.
04/13/2009ResourcesAdded product specification references and updated links.
03/04/2009Design ObjectivesAdded fuel efficiency information to return on investment - energy savings calculator.
01/05/2009Update SummaryAdded Update Summary Section following Glossary
01/05/2009Design ObjectivesAdded Simple Payback, Rate of Return, and Emission Calculator within Economic Considerations - Return On Investment section and footnote same within Sustainability section.