Providing the most comprehensive and largest inspection, HVAC, & Water Heater FREE reference resource of its kind!

The Building Intelligence Center assists home inspectors, commercial building inspectors, contractors, service technicians, insurance providers, home owners, and property managers in decoding the age of mechanical appliances such as furnaces, boilers, air conditioners, heat pumps, packaged rooftop units (RTU's), packaged terminal air conditioners (PTAC's), and water heaters.

The date of manufacture for many of these appliances is often encoded within the appliance serial number. The Building Intelligence Center provides the largest FREE resource library with the most comprehensive lists of mechanical appliance brand names and examples of their various serial number styles and date codes.

Mechanical systems have a limited service life. The manufacture date and age of a furnace, air conditioner, water heater, or boiler can play an important part of upkeep and maintenance. This is useful to anticipate the likelihood of impending repairs or replacement.

Upkeep and professional servicing of the heating and cooling systems and other mechanical systems are critical parts of routine building maintenance for improved safety and longevity of these systems. The Building Intelligence Center recommends routine inspections and professional servicing be performed by a qualified inspector and/or service technician/contractor seasonally or annually.

To begin your research, locate the brand name and serial number on the appropriate index page. Select the specific brand name for the particular mechanical system, and then locate the example serial number style that most closely resembles the serial number located on your system. With the most comprehensive and ever-growing list of examples in the industry, The Building Intelligence Center can help determine if and where the manufacture date has been coded within the serial number for your particular system.

We continue to add more brands, more serial number styles, and new resources to the site!!

Thank you for visiting and using our resource site! 

Bill W. & John B. & Sean F.

Read more about our history HERE