In 2002, J.M. Construction becomes dealers for M.D. Manufacturing.  M.D. Manu. is the leading central vacuum (CV) manufacturer in the country.  They have been making CV's longer then any manufacturer. We added them because they have the best CV's on the market.  Prior to 2002 JM was having local installers install these CV's in their homes in Southern California dating back to the 1980's.  We decided it was time that we install these ourselves.