Carrier Product Registration
http://www.registration.carrier.com/product_registration/RegistrationForm.aspx
Comfortmaker Product Registration
https://www.comfortmaker.com/en/us/product-registration-warranty/
Tempstar Product Registration
https://productregistration.icpusa.com/registrationform.aspx
Trane Product Registration
http://www.trane.com/residential/en/for-owners/warranty-and-registration.html