Smaller UPS systems below 10kVA in size are typically used within office environments to protect IT network servers and their local area networks. On-line UPS around 5-10kVA typically achieve an energy efficiency of around 95% or greater in on-line mode and up to 98% or more if they have an Eco line interactive mode. Smaller UPS tend (below 5kVA) tend to be less energy efficient and may be on-line, line interactive or even standby models. The size of the UPS and its rating will have little impact on overall energy efficiency in a medium to large office environment. Even in a small office, the losses from the UPS will be negligible.