Through-the-wall & PTAC

Through-the-wall air conditioners, matched to your wall sleeve

A through-the-wall unit has to fit the sleeve already in your wall, and its own size does not tell you which sleeve that is. We list 81 through-the-wall, PTAC and window-or-wall units from 9 brands (57 in stock right now), with the sleeve its maker says each one fits (73 of the 81 publish one), its heat option, its voltage where the listing states it, and the live price.

The sleeve in your wall

Its inside width, measured with the old unit out.

Heat
Outlet voltage

Friedrich Uni-Fit: fits 24½, 26 and 27 in. sleeves

Friedrich says the Uni-Fit fits existing 24½, 26 and 27-inch sleeves, and lists these makers' sleeves (25½ to 27 inches wide) as compatible: Amana, Carrier 51S and 52F, Fedders/Emerson, Friedrich WallMaster (WSE), GE/Hotpoint, Whirlpool, Frigidaire and White-Westinghouse. A trim ring covers gaps of up to 1 inch at the sides and ½ inch at the top, and in an existing sleeve Friedrich's manual has you replace the old rear grille with the one in the kit. A new installation needs Friedrich's USC or USEZ sleeve, sold separately. Source: Friedrich Uni-Fit brochure (sleeve table)

Keystone through-the-wall: fits 25½ to 27 in. sleeves

Keystone's installation manual lists the existing sleeves it fits, from Frigidaire, GE/Hotpoint, Whirlpool, Fedders/Emerson, Sears/Kenmore, Carrier and Friedrich (25½ to 27 inches wide), and the old rear grille is replaced by the one in the kit. Keystone's own sleeve for a new installation is the KSTSLV1, sold as a 26-inch sleeve (its spec sheet gives 25½ x 15¼ x 17½ in.), for walls up to 17¾ inches thick. Source: Keystone installation manual

Whirlpool through-the-wall: fits a 26 in. standard sleeve

Whirlpool's manual gives its standard sleeve as 26 inches wide, 15¾ high and 16¾ deep, and asks you to check that another maker's sleeve suits the unit before installing. A universal interior trim kit for an existing standard sleeve comes with it; new sleeves are sold separately. Source: Whirlpool installation manual

Perfect Aire through-the-wall: fits 25½ to 27 in. sleeves

Perfect Aire says this 24-inch unit fits standard wall sleeves, and its manual's chart lists sleeves 25½ to 27 inches wide (asking you to confirm yours with its maker); an interior trim kit is included. Its own sleeve for a new installation is the PAWS1, sold separately. Source: Perfect Aire product page

LG through-the-wall: fits 26 in. standard sleeves (25½ to 27 in.)

LG's manual lists the existing sleeves it fits (25½ to 27 inches wide, from Frigidaire, GE/Hotpoint, Whirlpool, Fedders/Emerson, Carrier and Friedrich), but LG strongly recommends a new LG sleeve and says an existing sleeve's rear louvers must be redirected. LG's own sleeve is the AXSVA1, or the AXSVA4 with a stamped grille (about 25⅞ x 15½ x 16¾ in.). Source: LG owner's manual (hosted by P.C. Richard)

TCL through-the-wall: needs a sleeve at least 26 x 15¾ in.

TCL says its through-the-wall units fit standard 26-inch sleeves: its manual asks for a sleeve (not supplied by TCL) at least 26 inches wide and about 15¾ inches high, and TCL strongly recommends insulating the gap if the sleeve is slightly larger. A sleeve shallower than 20 inches still works, but the unit then sits further out into the room. Source: TCL: choosing a wall sleeve

Friedrich WallMaster: fits 27 in. sleeves

Made for existing 27-inch sleeves, including Fedders A sleeves and, with Friedrich's baffle kit, the deeper Fedders B; it mounts flush with the outside wall. A new installation needs Friedrich's WSE or WSEZ sleeve (27 x 16¾ x 16¾ in.), sold separately. Source: Friedrich WallMaster product page

Friedrich Kuhl: fits a window, or a Friedrich Kuhl sleeve of its size

Its cabinet is its sleeve: it goes in a window, or through a wall in an opening sized for its chassis (Q, S, M or L). Friedrich says its sleeve sizes have not changed in over 45 years, so a new Kuhl fits an existing Friedrich sleeve of the same size. Its side air intakes must stay clear, so the wall can be no thicker than Friedrich's limit for that size (8½ in. for Q, 7⅜ in. for S and M, 15⅛ in. for L). Source: Friedrich Kuhl brochure (sleeve sizes)

Friedrich PTAC: fits a standard 42 x 16 in. PTAC sleeve

Fits standard 42 x 16-inch PTAC sleeves, other makers' included, without a baffle kit as long as the sleeve is no deeper than 13¾ inches (a deeper sleeve needs one). A new installation needs Friedrich's PDXWS sleeve and an outdoor grille, sold separately. Source: Friedrich PTAC brochure

Amana PTAC: fits Amana's 42 x 16 in. PTAC sleeve

Uses Amana's 42 x 16-inch wall sleeve (the industry-standard size) with an outdoor grille. Amana does not state which other makers' sleeves it fits, so check an existing sleeve and grille with Amana before you buy. Source: Amana PTAC wall sleeve page

Frigidaire PTAC: fits a 42 x 16 in. PTAC sleeve

Made for a 42 x 16-inch PTAC sleeve, 13¾ inches deep inside. For a replacement, Frigidaire's installation guide lists which other makers' sleeves it fits, and a Frigidaire sleeve used with another maker's grille needs its baffle kit. Source: Frigidaire FFRP122HT3 spec sheet (hosted by AMG Air)

  • Frigidaire FFRP122HT3 12,000 BTU PTAC heat pump

    Frigidaire

    FFRP122HT3 12,000 BTU PTAC heat pump
    PTAC11,800 BTUHeat pumpVoltage not stated

    Fits a 42 x 16 in. PTAC sleeve · chassis 42 x 16 x 21.75 in

    Not in stock at a retailer we track right now

Sleeve fit not confirmed

We could not confirm which sleeve sizes these units fit from their makers' own documents, so we do not guess. Check the maker's installation manual against the inside width and height of your sleeve before you buy.

73 of 81 units belong to a range whose maker publishes its sleeve fit. Fit statements come from the maker's own documents named beside each range, checked September 28, 2026. Prices are live retailer offers; compare.ac may earn a commission on purchases, at no cost to you.

Before you buy

Measure the sleeve, not the old unit

1. Measure the opening

Slide the old unit out and measure the inside of the sleeve: width first, then height and depth. Common residential widths are about 24½, 26 and 27 inches; a PTAC sleeve is 42 inches wide.

2. Match the maker's fit, not the chassis

A chassis is smaller than the sleeve it is made for. LG's units measure about 24 inches wide but are made for 26-inch standard sleeves, and Friedrich's 24¼-inch Uni-Fit chassis for sleeves from 24½ to 27 inches. Use the fit statement beside each unit.

3. Check the outlet

The outlet is already in the wall too. A 115-volt unit uses a standard outlet; a 230-volt unit needs a 230-volt outlet on its own circuit. PTACs run on 208/230 or 265 volts. Where a listing does not state its voltage, check it before you buy.

The best through-the-wall AC, one pick per brand PTAC units: heat pump or electric heat, 208/230 or 265 volts Through-the-wall ACs with heat: heat pump or coil, and the cost an hour Which wall units are heat pumps, and when they switch to electric heat Work out the BTU your room needs

Common questions

Through-the-wall air conditioners, answered

What size wall sleeve do I have?

Slide the old unit out and measure the inside of the sleeve: its width, then its height and depth. Or read the model number on the old unit's rating plate and look up the sleeve its maker specifies. Residential through-the-wall sleeves are commonly about 24½, 26 or 27 inches wide; PTACs in hotels and apartments use a 42-inch sleeve.

Will a new through-the-wall air conditioner fit my old sleeve?

Only if its maker says it fits that sleeve, and the unit's own size is not a guide. LG's through-the-wall units measure about 24 inches wide yet are made for 26-inch standard sleeves, and Friedrich's 24¼-inch Uni-Fit chassis is made for sleeves from 24½ to 27 inches. Match your sleeve's width, and where the maker gives them its height and depth, against the fit statement shown for each unit here, and expect to swap in the rear grille or trim kit that comes with the new unit.

What is the difference between a through-the-wall air conditioner and a PTAC?

A through-the-wall unit is a room air conditioner made to sit in a wall sleeve and vent out of the back, usually on a standard 115-volt or a 230-volt outlet. A PTAC (packaged terminal air conditioner) is the larger unit used in hotels and apartments: it fits a 42-inch sleeve with an outdoor grille, usually heats with electric heat or a heat pump, and runs on a dedicated 208/230-volt or 265-volt circuit.

Do I need a professional to install a through-the-wall air conditioner?

Not to replace one. Sliding a new unit into an existing sleeve it fits is a job you can do yourself (they are heavy, so plan on two people), with no refrigerant work. A new installation means cutting an opening through an exterior wall and fitting a sleeve, which is contractor work and usually needs a building permit. A PTAC also needs its own 208/230-volt or 265-volt circuit, which is an electrician's job if it is not already there.

What voltage does a through-the-wall air conditioner need?

Match the outlet already in the wall. A 115-volt unit uses a standard household outlet, while a 230-volt (208/230) unit needs a 230-volt outlet on its own circuit, which has a different plug shape. This page shows each unit's voltage only where its listing states it, so check the listing when it says the voltage is not stated.