HTP – Munchkin™

How to determine the date of production/manufacture or age of HTP and Munchkin™ HVAC Systems.

The date of production/manufacture or age of HTP and Munchkin™ HVAC equipment can be determined from the serial number located on the data plate.

Parent Company:  Heat Transfer Products (HTP)

Research Notes:
Determining the version of your Munchkin Boiler
Your boiler has a plate or sticker which tells you the model number, version, and serial number of your unit.
On our site, Pre-925 denotes units built prior to 11/02/02 having a Honeywell Control. It was the first version of the Munchkin, and your serial number sticker/plate will list the model number with no version number after it. This unit was built before the 925 Controller with the digital readout. In short, if your display only has a reset button and no digital readout, you have this version.
R1 (Revision 1) denotes units built 11/02/02 – 12/19/06. Generally the sticker will show an R1 on the sticker after your model number. For example, 80M R1.
R2 (Revision 2) denotes units built after 12/20/06. Generally the sticker will show an R2 on the sticker after your model number. For example, 80M R1, or 80M ASME R2.
For wall-hung units (T50M & T80M), R1 units were built 11/02/02 – 1/3/07, and R2 units after 1/4/07.
Your serial number sticker should have the manufacture date printed right on it.  The sticker is usually on the inside of the front cover.

Example serial number styles/formats found:

  • Style 1:     Unknown

Style 1: Unknown

Description: Unknown

Unfortunately we are unable to determine the date of manufacture or age of these units. Perhaps you can assist us in our research with additional information.
Email us at buildingintelligence@gmail.com

Using the ANSI or CSA standards to determine approximate Date of Manufacture.

Most manufacturers today are required to include the manufacture compliance standard on the data tag. For the U.S. the compliance standard is typically from the American National Standards Institute (ANSI). For Canada, a common standard compliance is through the Canada Standards Association Group (CSA). Many times both standards are listed. Regardless, the specific standard will normally be listed on the data tag/plate and followed by the YEAR of the last revision (often the year is placed in parenthesis or follows the hyphen after the specific standard number). As these standards are revised or renewed approximately every 4 to 6 years, one can reasonably estimate the year of manufacture within 4-6 years from (after) the standards date.

Page last updated: 2 April 2016

HTP, Inc.’s Corporate Office
272 Duchaine Boulevard
New Bedford, MA 02745
Telephone: 800 323 9651
Telephone: 508 763 8071
Fax: 508 763 3769
This area has been reserved for any special considerations that inspectors or HVAC equipment owners should pay particular attention too. Access to this information requires membership.

[link]
Any of the trademarks, service marks, collective marks, design rights or similar rights that are mentioned, used or cited in the articles of the Building Intelligence Center (www.buildingcenter.org) are the property of their respective owners. Their use here does not imply that you may use them for any purpose other than for the same or a similar informational use as contemplated by the original authors of these articles under the CC-BY-SA and GFDL licensing schemes. Unless otherwise stated Building Intelligence Center (www.buildingcenter.org) sites are neither endorsed by nor affiliated with any of the holders of any such rights and as such Building Intelligence Center (www.buildingcenter.org) cannot grant any rights to use any otherwise protected materials. Your use of any such or similar incorporeal property is at your own risk. This guide is intended to assist Commercial/Residential Building Inspectors, HVAC professionals, Facilities Managers, HOA’s, etc.., in determining the date of manufacture and/or age of HVAC equipment to determine the expected useful life (EUL). This web site should not be relied upon for commercial use or interpretations. Accuracy and reliability of the information provided is believed accurate but is not guaranteed. The burden for fitness of information provided relies solely and completely with the user. In no event will Building Intelligence Center or its representatives be liable for any loss or damages whatsoever for consequential, incidental, indirect, special, or tort damages of any kind, including but not limited to loss of data, lost profits, business interruption, loss of business information, or other pecuniary loss that might arise from the use of or reliance on the information provided within.
A Guide To Boilers For Home Inspectors