Payment is due in full upon submission of agreement. Monthly payments are available for a 2 or 3 year agreement if charged to an approved credit card. Cancellation of a credit card charged 2 or 3 year agreement after the first safety and efficiency service is completed, but before the duration of the agreement has expired results in a $150.00 cancellation fee, and the client is obligated to pay the difference between the yearly Safety Efficiency rate agreed upon and the yearly Safety and Efficiency rate that service was completed for all HVAC systems.