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Head-to-head · Best Window Fans

Genesis A1WINDOWFAN Twin 9-inch High-Velocity Window Fan vs Holmes HAWF2043 Dual 8-inch Blade Twin Window Fan with LED Thermostat

Which is the better buy? Side-by-side on rating, price, strengths, and watch-outs — with the published ratings we averaged to get there.

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The short answer

Genesis A1WINDOWFAN Twin 9-inch High-Velocity Window Fan comes out ahead by a clear margin (3.5 vs 3.1). The gap is mostly about Buyers who want the largest twin-blade airflow under $50 and don't mind manual reversibility or a slightly louder peak setting. — read the strengths below before deciding.

Genesis A1WINDOWFAN Twin 9-inch High-Velocity Window Fan
Higher ratedRanked #3 in Best Window Fans
Genesis A1WINDOWFAN Twin 9-inch High-Velocity Window Fan
3 sources2 derived$49.99as of Aug 1

With the largest blades of any twin in this round-up, the Genesis A1WINDOWFAN is the best value for buyers who care about raw airflow over creature comforts. Copper motors and a real thermostat lift it above bargain-bin twins. The plastic chassis and the noise on high are what keep it from beating the Bionaire premium pick.

Strengths
  • — Two 9-inch blades powered by independent copper motors, larger than every other twin in this round-up
  • — Adjustable thermostat with LED indicator lights lets you set a target temperature without a separate display
  • — Each blade can run as intake, exhaust, or be set to different speeds for directional cross-ventilation
Watch-outs
  • — TechGearLab measured peak noise at 55.1 dBA, noticeably louder than the Bionaire's 50.1 dBA
  • — Several reviewers report the blades and plastic frame feel fragile and have broken in shipping
  • — Direction switching is manual on the back panel - not as convenient as the Bionaire's electric reverse
$49.99 · Check Price on AmazonFull review →
Holmes HAWF2043 Dual 8-inch Blade Twin Window Fan with LED Thermostat
Ranked #4 in Best Window Fans
Holmes HAWF2043 Dual 8-inch Blade Twin Window Fan with LED Thermostat
1 sourceall derived$59.99as of Aug 1

The Holmes HAWF2043 is the long-standing classic of the thermostatic window-fan category, a Bionaire-style platform from a more conservative brand. Owner satisfaction over multi-year use runs high. TechGearLab's lab tests, though, put it behind both the Bionaire and the Genesis on airflow and quietness.

Strengths
  • — LED one-touch thermostat targets 60-80F with a single dial, no menu diving required
  • — Two 8-inch blades with independent intake/exhaust direction and two-speed control on each motor
  • — Holmes-branded chassis fits most double-hung and slider windows 24-37 inches wide
Watch-outs
  • — TechGearLab measured peak noise at 54.2 dBA and airflow at only 592 CFM - below the Bionaire and Genesis
  • — Cycle button advances through 11 increments to go from off to high - awkward in the dark
  • — Side-panel auto-lock can engage prematurely during installation, making fine fitment tricky
$59.99 · Check Price on AmazonFull review →

Derived means the reviewer published no score, so one was inferred from their written verdict. Everything else is a number the publisher printed. How we rank.

How they stack up

Genesis A1WINDOWFAN Twin 9-inch High-Velocity Window Fan

Larger 9" blades than the Bionaire BWF0910AR (8.5") but louder and without a remote; identical 9" blades to the Comfort Zone CZ319WT but with a real thermostat and copper motors; lacks the electric reversibility of the Bionaire BWF0910AR and the storm guard of the Lasko 2155A.

Holmes HAWF2043 Dual 8-inch Blade Twin Window Fan with LED Thermostat

Outperformed on raw CFM by both the Bionaire BWF0910AR (754 vs 592) and the Genesis A1WINDOWFAN (668 vs 592); same thermostatic category as the Bionaire BWF0910AR but with two speeds instead of three; smaller blades than the Comfort Zone CZ319WT or the Lasko 2155A.

Specs side-by-side

SpecGenesis A1WINDOWFAN Twin 9-inch High-Velocity Window FanHolmes HAWF2043 Dual 8-inch Blade Twin Window Fan with LED Thermostat
Blade Diameter9 in8 in
Fan CountTwin (dual blade, independent motors)Twin (dual blade)
Speeds3 per blade2 per blade
Airflow668.5 CFM (TechGearLab lab measured)592.1 CFM (TechGearLab lab measured)
Reversible DirectionYes - manual flip (intake / exhaust per blade)Yes - electric per blade (intake / exhaust)
Window Width Range23.5-36 in (with expander panels)24-37 in
ThermostatYes - adjustable with LED indicatorsYes - LED one-touch 60-80F
Noise55.1 dBA peak (TechGearLab)54.2 dBA peak (TechGearLab)
Power Source120V AC120V AC
CertificationETL—
Dimensions4"D x 24"W x 12"H6"D x 13.3"W x 25.5"H
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