Upgrade to longer, hotter showers with tankless water heaters in Naperville, IL. At TR Miller Heating, Cooling & Plumbing, we offer tankless water heater services that include installation, maintenance, and repairs for your on-demand heater. Whether you have an older model tankless unit that isn’t performing up to par or you’d like to upgrade your heater with a tank, we can help. Our experienced plumbers work with all types of water heaters and can make recommendations about repair and replacement options.