I have several lennox x4147 touchscreen thermostats for sale.they are all new never installed.7 day programmable.they will work on just about any system made,including heat pumps,and gas fired systems,up to 3 heat and 2 cool systems.they are made by honeywell for lennox.65.00 each and that includes shipping.i can also tell you how to wire them if needed.they will save you money on your utilities.if you want the best thermostat this is it.