Contact Us

Cullen Heating & Air Conditioning Inc.

577 Ritson Road South,
Oshawa, Ontario
L1H 5K6

Phone: 905-725-9731
Toll Free: 1-866-573-3116
Fax: 905.725.0886

cullenheatingair@bellnet.ca

Office Hours

Monday – Friday • 8:00AM – 4:00PM


After hours calls are received and returned as soon as possible. Please feel free to leave us a message on evenings and weekends. 

Scheduling an appointment just got easier! Cullen Heating & Air Conditioning now offers ONLINE scheduling for your convenience. 

Quickly fill out our online form and we will be diligent in confirming your appointment!