Staying cool in summer can be a challenge for homes with crank or casement windows, as traditional window air conditioners are rarely compatible. This guide explores the top air conditioners for crank windows, installation options, key considerations, and expert tips—helping American homeowners find an ideal cooling solution. Discover which AC units work best, how to install them, energy efficiency insights, and innovative alternatives for every budget.
| Category | Details |
|---|---|
| Best AC Types for Crank Windows | Vertical (casement) window ACs, portable ACs, mini-splits |
| Typical Cooling Capacity | 5,000–14,000 BTU (room size specific) |
| Average Cost Range | $250–$2,500 installed (varies by unit type) |
| Professional Installation Required? | Usually for mini-splits, self-install for most window/portable units |
| Energy Efficiency Options | Look for Energy Star, inverter models, programmable settings |
What Are Crank Windows? Key Features & Challenges
Crank windows, also known as casement windows, open outward with a hand-crank mechanism and typically swing to one side. Their vertical orientation and lack of a conventional sill make it tough to fit traditional horizontal window ACs. These windows are valued for ventilation and tight seals but can complicate home cooling strategies.
Common Cooling Challenges With Crank Windows
Homes with crank windows face unique hurdles when adding air conditioning:
- Standard window ACs do not fit: Traditional box units are designed for double-hung windows with vertical sashes, not the narrow, tall shape of casement windows.
- Maintaining window operation: Many AC solutions partially block window function or venting.
- Weatherproofing: A poor fit can create air leaks, reducing energy efficiency and comfort.
Successfully cooling rooms with crank windows requires specialized units or creative installations.
Best Types Of Air Conditioners For Crank Windows
There are three main categories of air conditioners that work well with crank or casement windows:
Vertical or Casement Window Air Conditioners
These are specifically designed for narrow, tall window openings—making them the closest fit for crank windows. They stand upright, usually 20–24 inches tall and less than 16 inches wide, and feature adjustable panels to seal gaps.
Popular models:
- Frigidaire FFRS0822SE (8,000 BTU)
- PerfectAire 3PASC10000 (10,000 BTU)
- Koldfront CAC8000W (8,000 BTU)
Vertical window ACs cool spaces up to 450 square feet and often offer easy DIY installation.
Call 888-906-9139 for Free Local HVAC Quotes – No Obligation, Just Savings!
Portable Air Conditioners With Window Kits
These stand-alone units vent hot air through a flexible hose and a window adapter kit, which works with many crank windows. Installation involves cutting a Plexiglas panel or using a kit to fill the open window, then fitting the exhaust hose through a secured opening.
- Black+Decker BPACT12WT (12,000 BTU)
- Whynter ARC-14S (14,000 BTU dual hose)
- Honeywell MO08CESWK (8,000 BTU)
Portable ACs can fit almost any window style, including crank, but take up floor space and need regular draining in humid climates.
Ductless Mini-Split Air Conditioners
This type does not require any window and instead mounts a discreet fan unit high on the wall, with a small conduit passing through an exterior wall. Mini-splits are the best choice for unobstructed views, high efficiency, and multi-room cooling.
- Pioneer WYS012-17 (12,000 BTU, Energy Star)
- MRCOOL DIY-12-HP-115B25 (12,000 BTU, DIY-friendly)
- Daikin 17 Series (9,000–24,000 BTU)
Mini-splits are pricier but offer quiet operation, heating, and strong energy savings.
How To Select The Best Air Conditioner For Crank Windows
Cavity Measurements & Sizing
Start by measuring your window opening’s height, width, and sill depth; compare these to the unit specs. For portable ACs, assess the available space near an outlet and a window. Mini-splits need a clear stretch of exterior wall.
Cooling Capacity (BTUs Needed)
Choose a model with the right BTUs for your room:
| Room Size (sq. ft.) | Recommended BTU |
|---|---|
| 100–250 | 5,000–6,000 |
| 250–400 | 7,000–8,500 |
| 400–550 | 10,000–12,000 |
| 550–750 | 14,000+ |
Oversized units cost more and cycle inefficiently, while units too small cannot cool effectively.
Call 888-906-9139 for Free Local HVAC Quotes – No Obligation, Just Savings!
Key Features To Look For
- Adjustable louvers and fan speeds for targeted comfort
- Digital thermostat for precise control
- Remote control, timer functions, and sleep mode for convenience and energy savings
- Dehumidification mode for extra climate control
- Energy Star certification for lower utility bills
Window and portable ACs often have filters that are easy to access and clean, an essential feature for allergy sufferers.
Installation & Security Considerations
Crank window installations may require custom panels or kits. For ground-floor windows, consider security brackets to prevent removal or intrusion. With mini-splits, professional installation is best, especially for electrical and refrigerant handling.
How To Install An Air Conditioner In A Crank Window
Installing A Vertical (Casement) Window AC
- Remove the screen, crank open the window fully, and dry-fit the AC.
- Open or remove the window sash as needed. Place the AC upright on the window sill with the accordion panels extending vertically to fill side gaps.
- Use a support bracket if recommended. Casement ACs are tall and heavy; this stabilizes the unit.
- Seal remaining gaps with included foam, weatherstripping, or acrylic panels. Secure with screws as shown in the manual.
- Test for security and turn on the unit.
Some units require minor window modifications—review manufacturer instructions carefully for warranty compliance.
Adapting A Portable AC Vent For Crank Windows
- Measure the window opening and cut a rigid Plexiglas, acrylic, or polycarbonate sheet to fit.
- Drill a hole for the exhaust hose (typically 5–6 inches diameter).
- Mount the hose adapter securely and close or latch the window against the filler panel for a tight seal.
- Use weather-seal tape around the edges to minimize drafts.
This approach works for almost all portable ACs, with adjustable kits also available for easier setup.
Mini-Split Installation For Crank Window Rooms
Mini-split AC installation involves wall-mounting the indoor unit and routing lines through an exterior wall, connecting it to a compressor outside. Most homeowners hire a licensed HVAC contractor for this work, ensuring efficient, high-performance cooling.
Energy Efficiency Tips For Crank Window Air Conditioning
- Choose Energy Star models to reduce energy bills by 10–30%.
- Add weatherstripping around the AC and window gaps.
- Close window shades during peak sunlight.
- Set AC timer functions or use programmable smart plugs.
- Clean or replace air filters monthly for optimum airflow.
- Use ceiling fans in tandem to circulate cooled air.
Properly sealed and maintained units avoid waste and deliver the best comfort for crank window setups.
Frequently Asked Questions About AC Units For Crank Windows
Can A Standard Window Air Conditioner Be Installed In A Crank Window?
No. Traditional window air conditioners are designed for double-hung horizontal sashes and will not fit in the vertical, narrow frame of most casement windows. Attempting to force an improper fit risks damage, leaks, and safety hazards.
Call 888-906-9139 for Free Local HVAC Quotes – No Obligation, Just Savings!
Are Casement Window AC Units Safe?
Casement or vertical ACs are designed for safe and secure installation in crank windows, provided you follow the manufacturer’s instructions and use all support brackets and seals. Properly installed, they are as stable as any standard window unit.
What’s The Quietest Air Conditioner Option?
Ductless mini-split systems are the quietest option—most indoor units generate only 19–30 decibels, well below the noise of a typical conversation. Quality portable and casement window units also offer low-noise modes.
How Can A Portable AC Be Ventilated Through Crank Windows?
Use an adapter panel cut to fit the opened space, with a vent hose port, and secure it in place with weather-seal tape or foam. Do not vent portable ACs into attics or other interior spaces, which can cause excess heat and moisture buildup.
Are There Affordable Options For Renters?
Portable ACs offer the most flexibility for renters)—they require almost no window modification and can travel with you. Some vertical window ACs can be installed without drilling, using supplied tension brackets and foam gaskets. Always check your lease before adding any unit that requires permanent changes.
Top-Rated Air Conditioners For Crank Windows: 2025 Reviews
| Brand & Model | Type | BTU | Features | Price Range |
|---|---|---|---|---|
| Frigidaire FFRS0822SE | Casement Window AC | 8,000 | Remote, timer, washable filter, Energy Star | $500–$650 |
| Whynter ARC-14S | Portable Dual Hose | 14,000 | Dehumidifier, digital controls, auto drain | $450–$600 |
| Pioneer WYS012-17 | Mini Split | 12,000 | Inverter, heating, remote, timer | $900–$1,300 (plus install) |
| Koldfront CAC8000W | Casement Window AC | 8,000 | 3 fan speeds, 4-way louver, sleep mode | $400–$600 |
| Black+Decker BPACT12WT | Portable AC | 12,000 | Remote, LED display, caster wheels | $350–$500 |
Selecting the best AC for a crank window depends on your room size, budget, and priorities. Vertical window ACs are a direct fit, portable ACs work in any room, and mini-splits offer whole-home versatility.
Creative Alternatives To Air Conditioners In Crank Window Homes
If a window AC or portable unit isn’t practical, consider these alternatives:
- Evaporative Coolers (Swamp Coolers): Use water to cool air but are best for dry climates.
- Window Fans: Use high-velocity fans with custom panels for better ventilation.
- Central Air System Upgrades: Add room vents or ductless zones.
- Thermal Curtains & Blinds: Reduce solar heat gain and keep rooms cooler passively.
- Portable Spot Coolers: Direct cold airflow in small sleeping or office areas without permanent installation.
Tips For Maximizing AC Performance In Casement Window Rooms
- Seal all installation gaps with foam, caulk, or panels.
- Insulate the Plexiglas or adapter kit when using portable ACs.
- Close doors to unused rooms to concentrate cooling.
- Keep the AC filter and coils clean for consistent airflow.
- Upgrade to smart thermostats or plugs for better scheduling and automatic shut-off.
Following these steps helps maintain comfort while reducing operating costs.
Call 888-906-9139 for Free Local HVAC Quotes – No Obligation, Just Savings!
Professional Advice: When To Call An Expert
Contact a licensed HVAC professional when installing mini-split AC systems or making structural changes to your home’s windows. Expert help ensures safety, compliance with building codes, and optimal long-term performance. For most portable and vertical window units, careful DIY installation works well, but don’t hesitate to seek guidance if unsure.
Final Checklist: Air Conditioning For Crank Windows
- Measure your window accurately before shopping for an AC.
- Compare casement window ACs, portable ACs, and mini-splits for your space and needs.
- Follow all installation guides and hone energy efficiency practices.
- Explore creative alternatives if permanent installation isn’t possible.
- Seek professional installation when necessary for safety and performance.
With the right approach, staying cool in homes with crank windows is not only possible, but comfortable and energy-savvy.