I recently completed a job installing a 3.5-ton attic installation heat pump for a customer. The customer was interested in a special size filter grille that was 20x30. I provided the customer with the necessary information and measurements to ensure that the grille would fit properly. I also installed the heat pump and made sure that it was working correctly before leaving the job site. The customer was very satisfied with the work that I performed and I am proud to have been able to help them with their home improvement project.