Go to [Link: smarthome.com]. You'll find a bunch of remote-controllable thermostats. Remember that iPronto is IR based. That means that your thermostat has to have an IR receiver or accept RF or powerline commands that can be initiated by an IR signal. If you want to use an X10-controlled thermostat, you'll need an ir543 device that converts iPronto IR to X10. The chances of your finding an RF-controlled thermostat compatible with NetX are pretty slim in the US. If you are in Europe you might have better luck, because the RF control frequencies used in Europe are often compatible with European components.