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Electric tankless water heaters deliver hot water on demand without storing it in a tank, saving space and energy. By heating water only as it’s needed, they reduce standby losses and can provide continuous hot water within their rated flow capacity. These compact, wall‑mounted units suit apartments, condos, tiny homes, remodels, and point‑of‑use locations like bathrooms, kitchens, garages, and outbuildings.
Key benefits include improved efficiency, precise temperature control, and lower risk of leaks compared to bulky tanks. Many models feature self‑modulating technology that adjusts power draw to match flow rate, digital thermostats for exact setpoints, and optional Wi‑Fi monitoring. With no combustion gases, electric units avoid venting requirements, simplifying indoor installation.
How to choose the right electric tankless water heater:
- Size by flow rate (GPM) and temperature rise. Add up simultaneous fixtures and check incoming water temperature for your climate. Colder water needs more kW to reach your target.
- Match electrical requirements. Whole‑home units commonly need 240V with multiple dedicated double‑pole breakers and appropriate wire gauge. Confirm panel capacity before purchase.
- Decide on point‑of‑use vs whole‑home. Smaller under‑sink models reduce wait times and water waste; larger units support showers, laundry, and dishwashers together.
- Consider water quality. Hard water calls for routine descaling or a scale‑reduction system to maintain performance.
- Look for durable components like stainless or copper heat exchangers, robust warranties, and safety certifications (UL/ETL).
Installation tips: mount vertically per the manual, use proper shutoff valves, ensure grounding and bonding, and pressure‑test connections. A licensed electrician and plumber can verify code compliance, breaker sizing, and wire runs. Plan for maintenance: flush with a descaling solution as recommended and clean inlet screens.
An electric tankless water heater can reduce energy use, free floor space, and deliver reliable, instant hot water. Whether upgrading an old tank or adding hot water to a remote fixture, the right sizing and professional installation will maximize comfort, performance, and long‑term savings.