How energy-efficient is the Hisense 8,000 BTU UltraSlim Window Air Conditioner?

Its efficiency rating is CEER 15, and it is ENERGY STAR certified.

What size room does the Hisense 8,000 BTU UltraSlim Window Air Conditioner cool?

It is rated to cool a room up to 350 sq ft (8,000 BTU · 2.3 kW).

Do I need a professional to install the Hisense 8,000 BTU UltraSlim Window Air Conditioner?

No. It is a window unit you can fit yourself, no professional needed. Usually no permit.

Window unitENERGY STAR

Hisense · Model AALW08TW26

8,000 BTU UltraSlim Window Air Conditioner

Name: Hisense 8,000 BTU UltraSlim Window Air Conditioner
Brand: Hisense
Price: 459 USD
Availability: InStock

A window air conditioner rated at 8,000 BTU for rooms up to 350 sq ft. It self-installs in a window.

$459

Live price at Sylvane

Price checked Oct 6, 2026

Buy at Sylvane In stock

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Will it cool your room?

Room size 700 sq ft ≈ 65 m²

Undersized for 65 m²

This is undersized for your 700 sq ft room. It would run flat out and struggle to keep up.

Running costest.

~$75/year

Estimated from ENERGY STAR's published annual energy use at about 750 hours of cooling a year (the DOE test standard) and the US average electricity price of 18.44¢/kWh (U.S. Energy Information Administration, Electric Power Monthly Table 5.6.A (residential average, May 2026)). A standardized figure for comparison; your real cost depends on how much you run it, your local rate and your climate.

Local rates vary widely (about 15¢/kWh in Florida to 33¢ in California), and hotter regions run their AC more hours, so your real cost differs.

Compare similar units

At a glance

Best for renters and rooms where you cannot install a fixed unit.

Cooling

2.3 kW

Size

Average

Noise

Install: Self-fit, no pro neededPermission: Usually no permit

Performance

Cooling capacity: 8,000 BTU · 2.3 kW
Heating capacity: Cooling only
Room coverage: up to 350 sq ft
Energy Star: Yes
CEER: 15
Annual energy (cooling): 400 kWh

Noise, size & features

Model number: AALW08TW26
Indoor noise: Not published
Outdoor noise: Not published
Indoor unit: 20.3 x 14.6 x 20.5 in
Outdoor unit: None
Refrigerant: R-32
Wi-Fi / app: Not published
Outdoor unit needed: No
Power supply: 115 V, NEMA 5-15P plug
Warranty: 2-Year Parts and Labor Limited Warranty

Supply voltage, plug, refrigerant and warranty are from Sylvane's published specifications for this exact configuration, checked Oct 2, 2026.

What is good

Uses R-32 (GWP 675), the low-GWP class new US residential equipment moved to.

Installation & the rules that apply

This is a window unit. No EPA Section 608 technician is needed: the refrigerant circuit is factory-sealed and never opened. A plug-in window unit needs no permit, so the friction is with your building rather than the government. Many HOAs restrict window units on appearance grounds, though an HOA regulating how you mount one stands on much firmer ground than one banning cooling outright. Landlords can set conditions, and the falling hazard is taken seriously: New York City, for instance, requires window units to be supported by brackets or mounting rails, and many building insurers and HOAs now require a bracket regardless of city.

Installation

Self-fit, no pro needed

Refrigerant

R-32

United StatesUS: local mechanical and electrical permits (vary by city)Reviewed June 2026Permit required

United StatesUS: historic district Certificate of AppropriatenessReviewed June 2026Permit required

United StatesUS: HOA / condo CC&Rs and architectural reviewReviewed June 2026Permit required

United StatesUS: NEC Article 440 dedicated circuit and disconnectReviewed June 2026Allowed with conditions

United StatesUS: window-unit restrictions and bracket/safety rulesReviewed June 2026Allowed with conditions

See all United States rules

Common questions about the Hisense 8,000 BTU UltraSlim Window Air Conditioner

How much does the Hisense 8,000 BTU UltraSlim Window Air Conditioner cost to run per year?: About $75 a year. Estimated from ENERGY STAR's published annual energy use at about 750 hours of cooling a year (the DOE test standard) and the US average electricity price of 18.44¢/kWh (U.S. Energy Information Administration, Electric Power Monthly Table 5.6.A (residential average, May 2026)). A standardized figure for comparison; your real cost depends on how much you run it, your local rate and your climate.
How energy-efficient is the Hisense 8,000 BTU UltraSlim Window Air Conditioner?: Its efficiency rating is CEER 15, and it is ENERGY STAR certified.
What size room does the Hisense 8,000 BTU UltraSlim Window Air Conditioner cool?: It is rated to cool a room up to 350 sq ft (8,000 BTU · 2.3 kW).
Do I need a professional to install the Hisense 8,000 BTU UltraSlim Window Air Conditioner?: No. It is a window unit you can fit yourself, no professional needed. Usually no permit.