Brand against brand

Keystone vs Frigidaire window air conditioners

Both lineups side by side at every size both brands sell, from the 27 new window air conditioners we can find in stock right now: live prices, CEER ratings, noise and the warranty each listing states.

The short answer

We track 12 Keystone and 15 Frigidaire window air conditioners in stock, and both brands sell 5 sizes in common (8,000, 10,000, 12,000, 14,000 and 18,000 BTU).

  • Frigidaire's cheapest model costs less at 3 of the 5 sizes; the two are within 5% or $20 at 2.
  • Where both publish a CEER rating at the same size (3 sizes), their best models are within 0.5 of each other.
  • Keystone has the quieter model, by 3 dB(A) or more, at 1 of the 4 sizes where both have a verified noise rating; the two are within 3 dB(A) at 3.
  • 2 Frigidaire models we track are named in CPSC recall 25-320 (risk of mold exposure); they are left out of this comparison and not sold here.

The better buy depends on your size, so compare the models at yours below.

Prices last refreshed Oct 24, 2026Independent, nobody pays for placement.

Keystone and Frigidaire at a glance

Keystone and Frigidaire window air conditioners: the in-stock lineups compared
KeystoneFrigidaire
In stock of models we track12 of 1715 of 21
Sizes in stock8,000 to 24,000 BTU5,000 to 18,000 BTU
Live prices$279.99 to $919.99$199 to $859
Best CEERCEER 15 (several models)CEER 15 (several models)
ENERGY STAR4 of 126 of 15
Inverter models4 of 126 of 15
Wi-Fi, as listed0 of 129 of 15
Heat too5 of 122 of 15
Compressor warranty, as listed1 to 4 yr (11 of 12 state it)1 yr (11 of 15 state it)
Recall checkNone named2 named in 25-320

Size by size

Every new window air conditioner of each brand we can find in stock, cheapest first, at each size both sell. A model within 5% of a size is grouped with it and shows its own rating. marks a noise rating we have checked against the retailer's specification for that exact model.

8,000 BTU

The two cheapest, head to head
  • Cheapest prices within 5% or $20 of each other
  • Quietest verified: Keystone 43 against 53 dB(A)

Keystone · 3 in stock

Frigidaire · 2 in stock

10,000 BTU

The two cheapest, head to head
  • Cheapest prices within 5% or $20 of each other
  • Best CEER within 0.5 of each other
  • Quietest verified ratings within 3 dB(A)

Keystone · 2 in stock

Frigidaire · 3 in stock

12,000 BTU

The two cheapest, head to head
  • Frigidaire's cheapest is $52 less
  • Best CEER within 0.5 of each other

Keystone · 2 in stock

Frigidaire · 3 in stock

14,000 BTU

The two cheapest, head to head
  • Frigidaire's cheapest is $102 less
  • Quietest verified ratings within 3 dB(A)

Keystone · 1 in stock

Frigidaire · 2 in stock

18,000 BTU

The two cheapest, head to head
  • Frigidaire's cheapest is $132 less
  • Best CEER within 0.5 of each other
  • Quietest verified ratings within 3 dB(A)

Keystone · 3 in stock

Frigidaire · 3 in stock

Only Keystone sells 24,000 BTU in stock; only Frigidaire sells 5,000 and 6,000 BTU.

Prices are live retailer offers and change often. compare.ac may earn a commission on purchases, at no cost to you; it never changes the price you pay or how we compare.

Recall check

Models a CPSC notice names are left out of the comparison above, and their purchase links stay paused.

How we compare two brands

  • Only new units we can find in stock with a live price, at the same size. A brand's average says more about its size mix than about the brand.
  • A price difference counts when it is at least 5% and at least $20, and only between models that install the same way (a do-it-yourself kit is never priced against an installer-fitted system).
  • Efficiency is compared on one scale (CEER) and counts at a gap of 0.5 or more; noise counts at 3 dB(A) or more, using only ratings checked against the retailer's specification for the exact model.
  • Warranty terms are as each listing states them. Models named in a CPSC recall are never compared or sold here.
Read our full methodology

Keystone vs Frigidaire: common questions

Is Keystone or Frigidaire cheaper?
It depends on the size. Comparing each brand's cheapest new, in-stock model at the same size, Frigidaire's cheapest model costs less at 12,000 BTU ($398 against $449.99), 14,000 BTU ($448 against $549.99) and 18,000 BTU ($548 against $679.99) and the two are within 5% or $20 at 2 sizes. These are live retailer prices and change often.
Which is more energy efficient, Keystone or Frigidaire window air conditioners?
Comparing the best CEER rating each brand publishes for its in-stock models at the same size, their best ratings are within 0.5 at 3 sizes. A higher CEER means less electricity for the same cooling. Not every listing publishes a rating, so a size with a rating on one side only is not compared.
Which is quieter, Keystone or Frigidaire?
Comparing the lowest indoor noise rating at each size both sell, counting only ratings we have checked against the retailer's specification for the exact model (its minimum noise level), Keystone has the quieter model at 8,000 BTU (43 against 53 dB(A)) and their quietest models are within 3 dB(A) at 3 sizes. A gap under 3 dB(A) is too small to hear reliably, so we call it a tie.
What sizes do Keystone and Frigidaire window air conditioners come in?
In stock right now, Keystone sells 8,000, 10,000, 12,000, 14,000, 18,000 and 24,000 BTU and Frigidaire sells 5,000, 6,000, 8,000, 10,000, 12,000, 14,000 and 18,000 BTU. So only Keystone sells 24,000 BTU and only Frigidaire sells 5,000 and 6,000 BTU. Size the unit to the room first: an oversized unit short-cycles and leaves the air cool but damp.
Do Keystone and Frigidaire make inverter window air conditioners?
Keystone has 4 inverter models in stock, and Frigidaire has 6, going by each listing and the maker's model numbers. An inverter compressor slows down instead of switching on and off, which is usually quieter and more efficient at part load.
Which has the longer warranty, Keystone or Frigidaire?
As the retailer listings state it, in-stock Keystone models cover the compressor for 1 to 4 years depending on the model (11 of 12 listings state a term) and Frigidaire models for 1 year (11 of 15). Where a listing names no separate compressor term, its general or parts term is what covers the compressor. Some terms require registering the unit, and a maker can require professional installation to honor its warranty, so read the warranty document before you buy.
Have any Keystone or Frigidaire window air conditioners been recalled?
CPSC recall 25-320 (June 2025) was issued for the risk of mold exposure; it names 2 Frigidaire models we track (GHWQ105WD1 and GHWQ125WD1). Those are left out of this comparison and not sold here. Check the model number on your own unit's label against the notice.

Go deeper

Is Keystone a good brand? Every Keystone air conditionerIs Frigidaire a good brand? Every Frigidaire air conditionerBest window ACWindow vs portableWhat size do you need? Sizing calculator

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