TH4110U2005

The T Series brochure linked on this page puts TH4110U2005 in the non-connected T4 Pro row. That row lists program options of 7-day, 5-2, 5-1-1, or non-programmable, power from a battery or a C-wire, and a 3.93 square inch display. Stages in the row are 1H/1C heat pump and 1H/1C conventional. The same row marks dual fuel as no, indoor and outdoor sensors as no, and a filter change reminder as yes.

The brochure describes the non-connected T Series as thermostats that share one UWP mounting system, so the install process is the same across the series. It also describes a snap-together design for moving from a non-connected thermostat to a connected one without removing the connector and cover plate, and it marks that upgrade path with a note that a C-wire is required. This page describes TH4110U2005 as a T4 Pro programmable thermostat for 1H/1C heat pump or 1H/1C conventional systems.