We have used the services of the DonMar company for over 16 years. They have installed and maintained the heating and air conditioning equipment in both our home and that of our rental property. At all times the services have been on time and professional. Their technicians are knowledgeable and well trained. The installations were performed quickly. The surrounding areas were left clean and neat. There responses to telephone and email inquiries have demonstrated their interest in providing excellent customer service for their products