Here at M. J. Mac Inc. we specialize in heating, air conditioning and refrigeration for both commercial and residential customers. We serve the entire Philadelphia area. M. J. Mac’s mission is to build strong and long standing relationships with their customers. We are here to answer the call every time, no matter how small the job is. We pride ourselves on our dependability. There is no request too small for M. J. Mac. We believe in doing the best job the first time, and on time. We will never need a second chance to prove ourselves, as we impress the customer with the first visit. M.J. Mac Inc. is committed to providing the best service to our clients; operating with, and promoting a very high standard of ethics.