Recommended by Dominick Plumbing
Trutankless GEN3 Electric Tankless Water Heater
All-electric, no-gas-required tankless — assembled in the USA and built for Arizona homes without natural gas service.
- Licensed & Insured · ROC #350819
- Pro install & warranty
Why we recommend it
Trutankless GEN3 Electric Tankless Water Heater — our honest take
The Trutankless GEN3 is the electric tankless water heater we install for Scottsdale, Cave Creek, and Carefree homes that don't have natural gas — or for homeowners going all-electric. One compact 28 lb wall-mounted unit replaces a 50-gallon tank, runs on standard 200A residential service at the R120 setting (the way ~85% of installs are configured), and reaches set temperature in about 15 seconds.
- The right pick for all-electric Scottsdale/Cave Creek homes with no natural gas line
- Tiny 28 lb wall-mounted footprint frees up garage or utility-closet space
- Incoloy elements hold up to Arizona's 18–22 gpg hard water far better than copper alternatives
- Runs on the 200A panel ~80% of Valley homes already have — no service upgrade in most cases
- Pairs perfectly with the Encore Reveal softener to maximize element life
Key features
What you're getting
- 99% energy factor — virtually no standby loss vs. a tank heater
- Incoloy 800 heating elements — superior resistance to Scottsdale hard-water scale
- Seamless passivated stainless steel heat exchanger manifold
- Reaches set temperature in ~15 seconds (2× faster than previous Trutankless models)
- Recirculation-pump compatible — activates at just 0.25 GPM
- Solid-state relays, leak-detection shut-down, and temperature relief built in
- Assembled in the USA with field-replaceable components
Specs at a glance
Trutankless Electric Tankless Water Heater specifications
- Type
- Whole-home electric tankless (3-element)
- Dimensions
- 25-1/4″ H × 17-1/8″ W × 5-1/2″ D · 28 lb
- Max outlet temp
- 140°F
- Flow range
- 0.3 GPM activation · up to 7.5 GPM max
- Voltage / wattage
- 220/240 VAC · 12.4–29.4 kW
- Power settings
- R60 / R80 / R100 / R120 (60–120 A configurable)
- Working pressure
- 80 PSI (tested to 150 PSI)
- Energy factor
- 0.99 (99% efficient)
- Warranty
- Standard factory warranty · +5 yr extension available
FAQs
Common questions
Can I install a Trutankless GEN3 on my existing electrical panel?
Most Scottsdale homes already have 200 A service, which supports the full R120 (120 A) setting — the way roughly 85% of Trutankless units are installed. Per NEC 220-82/83, GEN3 is classified as a non-continuous heating appliance and adds only ~40% of nameplate to your service load (about 48 A on R120), so a panel upgrade is rarely required. We always do a load calculation before quoting.
Trutankless GEN3 vs. a Navien gas tankless — which should I get?
If your home has natural gas service, the Navien NPE-A2 gas tankless is usually cheaper to run in Arizona and delivers higher max GPM. Choose the Trutankless GEN3 when your home is all-electric, has no gas line at the heater location, or you're moving off gas entirely. It's also a great fit for casitas and ADUs where running new gas isn't practical.
How much does a Trutankless GEN3 installation cost in Scottsdale?
Most Scottsdale Trutankless GEN3 installs run $3,800–$6,500 fully supplied and installed, depending on electrical work (new double-pole breakers, conduit run, possible subpanel), water-line rework, and whether we're adding a recirculation pump. Always a flat written quote before we start.
Will it actually keep up with two showers running at once?
At the R120 setting on a 200 A panel, GEN3 delivers up to 7.5 GPM — enough for two simultaneous showers in most Scottsdale homes year-round (incoming water in the Valley is warm, which favors electric tankless). For very large homes or extreme demand we'll size a dual-unit install on a 400 A service.
Does it work with a recirculation pump for instant hot water?
Yes — unlike most electric tankless, GEN3 activates at just 0.25 GPM, which is inside the operating range of standard recirculation pumps. We recommend pairing it with a timer set to your household's hot-water schedule to preserve the efficiency advantage.