PREMIER Sponsor of

The Building Intelligence Center!

This site was created and primarily supported through personal funds and countless man hours of two close friends and colleagues who live miles (states) apart.

For those who rely upon this resource, your financial support is greatly appreciated to help us to continue maintaining this site FREE for your use!

Please consider a small donation.

A very heartfelt THANK YOU to those who have donated. We greatly appreciate your continued support and encouragement.

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Thank-You for making us "Your #1 Resource" for... Furnace age, Water Heater age, Air Conditioner age, & Boiler age. Over 4 Million visitors per year - - and growwwwing!

Recommended Inspection Resources:


A word about your mechanical systems…

Upkeep and professional servicing of your air conditioner, furnace, boiler, or water heater is an important part of routine building maintenance.

The Building Intelligence Center recommends annual inspections and service be performed by a qualified inspector or service technician/contractor.

The age of your furnace, air conditioner, water heater, or boiler can play an important part of this maintenance, and assist  property owners with decisions to either repair or replace with more efficient equipment. Mechanical appliance age may also affect certain insurance provisions.

The Building Intelligence Center assists home owners, property managers, home inspectors, commercial building inspectors, contractors, service technicians, and insurance providers in decoding the age of these mechanical appliances by providing a resource library of industry brands and sample serial numbers where the date of manufacture is often coded.

Thank you for visiting and using our free resource site! 

Bill W. & John B.