Founded in Baltimore, MD in 1970, EIL Instruments, Energy Controls Group became Energy Controls International (ECI) in 1997. In 2000, ECI was acquired by Danfoss. Danfoss has since discontinued manufacturing these products.
| Publication COM-99 Manual 1987 : COM-99 Installation & Operation Manual v1.0. |
| Publication 4464401502 1997 : EC & ERC-1000 Operations & Programming Manual v5.7. |
| Publication EC-130 Manual 1988 : EC-130 Environmental Control Installation & Operations Manual v1.0. |
| Publication RC-48 Manual 1988 : RC-48 Systems Manual 120 Vac Model v3.3. |
| Publication 4464402800 1995 : RC-2000 Operations & Programming Manual v1.1. |
| Publication 4464401800 v3.3 1996 : Smart Alarm Manual. |
| Publication TDC-64 Manual 1987 : TDC-64 Installation & Operation Manual v3.4. |