Navigation for Electrical How To & DIY Ideas & Inspiration Installation Planning Video ReviewsBest Uses for an Electric Tankless Water Heater Ask This Old House plumbing and heating expert Richard Trethewey discusses which houses are the best fit for an electric tankless water heater by Richard Trethewey and Kevin O'Connor, Host Resources: Expert assistance with this segment was provided by Bosch Thermotechnology.Next Up In Electrical How to Label a Circuit Breaker Simple Guide for Selecting a Home Generator All About Portable Power Stations Simple Guide to Installing a Generator Hook-Up How to Build a Utility Cover Understanding Smoke and Carbon Monoxide Detectors