GE Profile 40 Gal
#2 in 40–50 GallonFull review
The pick for most homes with a 240 V circuit: the most efficient and quietest heater here, at every size.
GE Appliances PC Richard $2,419.97$2,419.97
The GE Profile 40 Gal is the better heat pump water heater overall, rated 4.0 to 3.3. The GE Profile 40 Gal leads on efficiency and noise.
Ariston NUOS Side-Connect 40 Gal
#15 in 40–50 GallonFull review
A non-Midea design with a leak sensor built in and a 10-year tank and parts warranty, sold through plumbing dealers. It is louder than most here.
Prices were last checked October 21, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Which should you buy?
- Choose the GE Profile 40 Gal for efficiency (4.20 UEF vs 3.58 UEF) and noise (41 dB(A) vs 49.1 dB(A)).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every 40–50 gallon heat pump water heater; a clear win is highlighted. How we rank explains each one.
| Factor weight | GE Profile 40 Gal | Ariston NUOS Side-Connect 40 Gal |
|---|---|---|
| Overall rating | 4.0/5 | 3.3/5 |
| Efficiency 35% | 86 4.20 UEF | 41 3.58 UEF |
| Hot water 20% | 56 64 gallons in the first hour | 64 66 gallons in the first hour |
| Warranty 20% | 75 10-year tank, 10-year parts, 1-year labor | 70 10-year tank, 10-year parts |
| Cold rooms 15% | 40 heat pump runs down to 35 °F room air | 40 heat pump runs down to 35 °F room air |
| Noise 10% | 94 41 dB(A) | 43 49.1 dB(A) |
Specifications
| GE Profile 40 Gal | Ariston NUOS Side-Connect 40 Gal | |
|---|---|---|
| Ratings (ENERGY STAR) | ||
| Size (nominal) | 40 gal | 40 gal |
| Tank volume (measured) | 40 gal | 37 gal |
| Uniform Energy Factor | 4.20 | 3.58 |
| First-hour rating | 64 gal | 66 gal |
| Draw pattern | Medium | Medium |
| Yearly energy use | 773 kWh | 907 kWh |
| Heat pump cut-off (low) | 35 °F | 35 °F |
| Sound level | 41 dB(A) | 49.1 dB(A) |
| ENERGY STAR ID | 4016264 | 3942613 |
| Installation | ||
| Power | 240 V | 240 V |
| Circuit | 30 A, 208/240 V | 30 A, 208/240 V |
| Backup element | 5,500 W | 4,500 W |
| Operating air range | 35 to 120 °F | 36 to 120 °F |
| Minimum room size | 700 cu ft | 700 cu ft |
| Size | 39.4 in tall, 18.5 in across | 37.6 in tall, 18.2 in across |
| Weight | 165 lb | - |
| Refrigerant | R1234YF | R-134a |
| Features | ||
| Wi-Fi | Built in | Built in |
| App | SmartHQ | Ariston NET |
| Demand response port (CTA-2045) | Yes | Yes |
| Leak detection | Yes | Yes |
| Modes | Heat Pump, Hybrid, High Demand, Electric, Vacation | Comfort, Green, Fast, Electric, Vacation |
| Warranty and models | ||
| Warranty | 10 yr tank, 10 yr parts, 1 yr labor | 10 yr tank, 10 yr parts |
| Also sold as | - | American Standard ASHPWH-40*****, Lennox WHHP040T45MD240S**** |
| Released | 2025-05 | 2024-12 |