The Honeywell TH1100DV1000 is s PRO 1000 series non-programmable thermostat for heat only applications.The TH1100DV1000 from Honeywell is a vertical non-programmable thermostat designed to provide heat only applications. It comes from the PRO 1000 series and has an adjustable temperature scales with a standard selection of 40F to 90F or a garage selection of 35F to 90F. It includes compressor protection and one-touch access to setpoint temperature. It also comes complete with manual changeover and a backlit display.