Head-to-head · Best Window Fans

Holmes HAWF2043 Dual 8" Blade Twin Window Fan with LED Thermostat vs Lasko 2155A 16" Electrically Reversible Window Fan with Storm Guard

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

The short answer

Holmes HAWF2043 Dual 8" Blade Twin Window Fan with LED Thermostat comes out ahead by a narrow margin (4.2 vs 4.0). The gap is mostly about Buyers who want a Bionaire-class thermostatic twin with a longer track record - and who plan to leave the fan installed in one window all summer. — read the strengths below before deciding.

Higher ratedRanked #3 in Best Window Fans

Holmes HAWF2043 Dual 8" Blade Twin Window Fan with LED Thermostat

4.2

The Holmes HAWF2043 is the long-standing classic of the thermostatic window-fan category - a Bionaire-style platform from a more conservative brand. It scores well on owner satisfaction over multi-year use, but TechGearLab's lab tests put it behind both the Bionaire and 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

$0 · Check Price on Amazon Full review →

Ranked #5 in Best Window Fans

Lasko 2155A 16" Electrically Reversible Window Fan with Storm Guard

4.0

The Lasko 2155A is the specialty pick for whole-house ventilation through a single large window. The 16-inch electrically reversible blade pushes more air than any twin fan in this round-up, and the Storm Guard feature is a genuinely useful weather convenience, but the build quality and noise floor sit firmly in 'workhorse, not bedroom' territory.

Strengths

— Single 16" 3-blade fan moves a manufacturer-rated 2,470 CFM - more raw airflow than any twin in this round-up
— Electrically reversible via a single dial - no need to flip the fan to switch from intake to exhaust
— Patented Storm Guard feature lets you close the window behind the fan during rain or for nighttime security

Watch-outs

— Noticeably louder on high than any twin fan - rattling and vibration are consistent complaints in Amazon and Home Depot reviews
— Plastic frame around the metal grills is criticized as flimsy for the unit's size
— Reliability is bimodal - units that last a decade are common, but motor failures within months also appear in reviews

$0 · Check Price on Amazon Full review →

How they stack up

Holmes HAWF2043 Dual 8" 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.

Lasko 2155A 16" Electrically Reversible Window Fan with Storm Guard

Fundamentally different product than the twin window fans - single 16" blade rather than dual 8-9" blades; pushes more raw CFM than the Bionaire BWF0910AR, Genesis A1WINDOWFAN, Holmes HAWF2043 or Comfort Zone CZ319WT combined; the only fan in this round-up with Storm Guard weather protection.

Specs side-by-side

Spec	Holmes HAWF2043 Dual 8" Blade Twin Window Fan with LED Thermostat	Lasko 2155A 16" Electrically Reversible Window Fan with Storm Guard
Blade Diameter	8 in	16 in
Fan Count	Twin (dual blade)	Single (3-blade)
Speeds	2 per blade	3 (intake and exhaust)
Airflow	592.1 CFM (TechGearLab lab measured)	2,470 CFM (Lasko manufacturer spec)
Reversible Direction	Yes - electric per blade (intake / exhaust)	Yes - electric dial (intake / exhaust)
Window Width Range	24-37 in	26.5-34.5 in
Thermostat	Yes - LED one-touch 60-80F	No
Noise	54.2 dBA peak (TechGearLab)	—
Power Source	120V AC	120V AC
Warranty	—	1 year
Storm Guard	—	Yes (allows window to close behind fan)

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