At ' Sheet Metal, no job is too big or too small. We pride ourselves on providing the highest quality of service to each and every one of our customers. ' Sheet Metal has received the prestigious Circle of Excellence Award from Lennox a total of 16 times, including the last 10 consecutive years. The Circle of Excellence Award recognizes the top 50 Lennox dealers in the US and Canada for outstanding accomplishments, exemplary customer service, high quality installations and consistent sales growth.