HVAC

This unique t-shirt features Air Duct schematics from a genuine vintage U.S. Patent filed in 1940! These shirts look awesome, fit well, are great conversation starters and an excellent gift for hvac technicians, engineers & contractors! Product...

This unique t-shirt features Air Conditioner schematics from a genuine vintage U.S. Patent filed in 1968! These shirts look awesome, fit well, are great conversation starters and an excellent gift for hvac technicians, engineers &...

This unique t-shirt features Air Conditioning schematics from a genuine vintage U.S. Patent filed in 1940! These shirts look awesome, fit well, are great conversation starters and an excellent gift for hvac technicians, engineers &...

This unique t-shirt features Exhaust Fan schematics from a genuine vintage U.S. Patent filed in 1897! These shirts look awesome, fit well, are great conversation starters and an excellent gift for hvac technicians, engineers &...