Looking for a dishwasher that heats water instantly for spotless results, energy savings, and the cleanest dishes possible? Many of today’s top dishwashers use a **tankless (instant) water heater system** instead of a bulky, always-on water tank. These advanced models deliver hot water on demand, improve sanitation, and are more efficient for your home. Here’s your full guide to the best dishwashers with tankless water heaters, what to look for, and which brands lead the pack in 2025.
Quick Picks: Best Dishwashers with Tankless Water Heaters
-
Best Overall:
Bosch 800 Series SHXM78Z55N -
Best Premium:
Miele G 7366 SCVi AutoDos -
Best Value:
GE Profile PDT715SYNFS
Buyer’s Guide: What Is a Tankless Water Heater Dishwasher?
- How it Works: Instead of a separate hot water tank, tankless dishwashers use a powerful in-line heater (flow-through or instant) to heat water only when needed. This means no wasted energy keeping a tank hot 24/7.
- Benefits:
- Energy efficient—only heats what you use
- Consistent, on-demand hot water (up to 160°F+ for sanitizing)
- Compact, with more usable space inside
- Improved hygiene—hotter water for better bacteria removal
- Faster cycle times compared to older tanked models
- How to Spot One:
- Look for terms like “flow-through water heater,” “tankless heater,” or “instant heating element” in the specs
- Nearly all modern high-end Bosch, Miele, and GE dishwashers use tankless water heating
- Other Features to Look For:
- Stainless steel tub (retains heat and resists stains)
- Sanitize cycles (great for baby bottles, cutting boards, and allergy households)
- Quiet operation (under 45 dBA for best results)
- Flexible racks and third rack for more space
Full Reviews: Best Tankless Water Heater Dishwashers
Bosch 800 Series SHXM78Z55N
Who it’s for: Anyone who wants top cleaning, whisper-quiet performance, and maximum energy savings with instant water heating.
- Key Benefits:
- Flow-through, tankless water heater for fast, consistent hot water
- CrystalDry™ for extra dry dishes—even plastics
- Stainless steel tub and racks
- 42 dBA ultra-quiet
- Flexible third rack and adjustable tines
- Pros:
- Legendary Bosch reliability and energy efficiency
- AutoAir™ for fresher dishes
- Low water usage
- Cons:
- Premium price
- Professional install recommended
Final Verdict: Best overall tankless dishwasher—outstanding performance and energy savings.
See Bosch 800 Price.
Miele G 7366 SCVi AutoDos
Who it’s for: Luxury buyers wanting the quietest, most advanced tankless dishwasher with German engineering.
- Key Benefits:
- On-demand water heater for perfect cleaning and fast cycles
- AutoDos automatic detergent dispenser
- AutoOpen Dry for spotless results
- Flexible, stainless steel racks and third rack
- Super quiet (42 dBA)
- Pros:
- Premium build quality
- Knock2Open handle-free design
- Advanced drying system
- Cons:
- Expensive (over $2,000)
- Requires Miele detergent for AutoDos
Final Verdict: Best tankless dishwasher for luxury homes and open kitchens.
Shop Miele G 7366 SCVi.
GE Profile PDT715SYNFS
Who it’s for: Households who want advanced, tankless water heating and top features at a more affordable price.
- Key Benefits:
- Flow-through heater for instant hot water and sanitize cycles
- Dry Boost™ for improved drying
- Hard food disposer and bottle jets
- Third rack for utensils and flatware
- Stainless steel tub
- Pros:
- Great balance of value and features
- Sanitize and extra dry cycles
- Reliable GE Profile build
- Cons:
- A bit louder (45 dBA) than premium models
- Dry Boost not as strong as Bosch/Miele
Final Verdict: Best value for a tankless heater dishwasher under $1,200.
Check GE Profile Price.
Comparison Table: Best Dishwashers with Tankless Water Heaters
| Name | Tankless Water Heater | Noise Level | Drying System | Price Link |
|---|---|---|---|---|
| Bosch 800 Series SHXM78Z55N | Flow-through (instant heat) | 42 dBA | CrystalDry™ + AutoAir™ | View Price |
| Miele G 7366 SCVi AutoDos | Instant heater, on-demand | 42 dBA | AutoOpen Dry | View Price |
| GE Profile PDT715SYNFS | Flow-through (instant heat) | 45 dBA | Dry Boost™ | View Price |
Frequently Asked Questions (FAQ)
What is a tankless water heater in a dishwasher?
It’s an instant heating element that heats water on demand, unlike older models with a standing hot water tank. It’s more efficient, saves space, and delivers hotter water for better cleaning.
Are tankless water heater dishwashers more efficient?
Yes. They only use energy when water is needed, so there’s less standby loss and lower utility bills.
Do Bosch and Miele use tankless heaters in all dishwashers?
Nearly all Bosch 800 Series and Miele full-size dishwashers feature tankless, flow-through heaters. Check your model’s specs to be sure.
Can I connect a tankless dishwasher to cold water?
Yes—these dishwashers will heat incoming cold water to the right temperature, so a hot water line is not required.
Do tankless dishwashers sanitize dishes better?
Absolutely. Instant high temperatures (up to 160°F+) ensure true sanitization, ideal for families with babies or immune sensitivities.
Conclusion & Call to Action
A dishwasher with a tankless water heater gives you the cleanest dishes, the lowest bills, and unbeatable reliability. The Bosch 800 Series, Miele G 7366 SCVi, and GE Profile PDT715SYNFS are the leaders for 2025—pick the one that fits your kitchen and budget, and enjoy perfect cleaning for years to come!
Ready to upgrade? Click any link above to check prices and get your next-generation tankless water heater dishwasher today!