Founded in 1985 in Glenside, Pennsylvania, Monitor Data Corporation manufactures utility submetering and energy cost-allocation systems for multifamily and commercial buildings. Its Monitor Data 2000 system uses two-way, real-time monitoring to track heating and cooling use, while the company’s billing service turns meter readings into resident statements and payment records. President Thomas K. McHugh, the system’s designer and patent holder, brings decades of heating-system design experience to the privately held company.