Name: Ariston NUOS Side-Connect 65 Gal
Brand: Ariston

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.

No store we check sells it online; the maker lists where to buy or who installs it.

Pros

Cons

How it scores

The rating comes from 5 measured or published factors, each scored 0-100 against fixed reference points for its size. How we rank explains each one.

Specifications

Ratings (ENERGY STAR)
Model number	ARIHPWH-65
Size (nominal)	65 gal
Tank volume (measured)	62 gal
Uniform Energy Factor	3.85
First-hour rating	78 gal
Draw pattern	High
Yearly energy use	1,289 kWh
Heat pump cut-off (low)	35 °F
Sound level	49.1 dB(A)
ENERGY STAR ID	3942614
Installation
Power	240 V
Circuit	30 A, 208/240 V
Backup element	4,500 W
Operating air range	36 to 120 °F
Minimum room size	700 cu ft
Size	50 in tall, 20.2 in across
Refrigerant	R-134a
Features
Wi-Fi	Built in
App	Ariston NET
Demand response port (CTA-2045)	Yes
Leak detection	Yes
Modes	Comfort, Green, Fast, Electric, Vacation
Warranty and models
Warranty	10 yr tank, 10 yr parts
Also sold as	American Standard ASHPWH-65***, Lennox WHHP065T45MD240S**
Released	2024-12

A solid 240 V heater with leak protection included, sold at Lowe’s as the Signature 900 line.

$2,598

The Midea original behind several heaters here, sold through HVAC contractors. Buy whichever version is easiest to get with the warranty you want.

The Midea-built design sold direct by Senville, for a buyer comfortable with a smaller brand’s warranty terms.

$2,199.99