Obsolete Brand of Boyertown Furnace Co.

How to determine the date of production/manufacture or age of Hallmark® HVAC Systems.

The date of production/manufacture or age of Hallmark® HVAC equipment can be determined from the serial number located on the data plate.

Parent Company:  Boyertown Furnace Company
Sister or similar Brands Include:  Cox® | Hallmark® (Obsolete) | Regal® | Regal Star® | Savio® (Obsolete) | Solaia®

Example serial number styles/formats found:

  • Style 1: 32376

Style 1:     32376

Description: This five (5) character serial number was transcribed from a Hallmark® brand boiler manufactured by Boyertown Furnace Co.  Boyertown assigns consecutive numbers to their brands.  To determine the date of manufacture it is necessary to call Boyertown at (610) 369-1450 for assistance.
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 [email protected]
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.


The following was received from one of our viewers from Province, CT:
Boyertown Furnace took over the Hallmark oil furnace label in 1982 per representative on phone.  The above referenced furnace was older than any information they have, even from before, and I am thinking it may have been the home’s original from 1961.  Label lists manufacturer as “Heating Specialties, Inc. Baltimore 29 MD” It looks like Boyertown was still manufacturing the model as late as 2009, and brochure is still on their website under Obsolete Products.  The picture there looks very similar to the unit I inspected. Techs in the forums generally call them very reliable except for a period in the 80s. Interesting.
Building Intelligence Center’s Response to viewer from Province, CT:
Thank you very much for this information and your donation!
As per your estimate of age, it would be our best “guess” as well that the unit is original to the home. This would be based off the fact that the label used a city postal zone (Baltimore 29). Postal zones were first used circa 1943 for about 160 major cities across the U.S. Zip codes (5-digit) were first introduced in 1963 for all areas of the country. From this we can logically conclude that the unit was manufactured between 1943 and 1963. As you indicate the home was built in 1961, this is the most logical conclusion for the age of the unit as well.
We will try to incorporate some of the information you provided into our new website. We would love to have any photos of the unit, data plate, name plates, etc. (the more the better). Please forward them to this email if you care to share.
Best regards,

Bill W. –

Page last updated: 2 Oct 2015