I am a skilled professional that works for a Dor-Mar Heating & Air Conditioning company. I recently completed a job for a customer who had a heating and air conditioning system that was over 10 years old. The system was not working properly, and the customer was concerned about the cost of repairs. I recommended that they purchase a new system with a 10-year parts and labor warranty. The customer agreed, and I installed the new system in their home. The new system is much more efficient than the old one, and it has a longer lifespan. The customer is very happy with the new system, and they are confident that it will last for many years to come.