Great question. A layered approach can help strengthen vulnerable windows without overhauling your home.

• Use adjustable window security bars on sliding windows to block the track. Many install with tension or brackets and adjust to fit.
• Add window guards for rooms where fall prevention matters. Look for versions with quick-release features where emergency egress is required.
• Install sliding window lock clamps or pins to secure the sash and limit how far it opens.
• Consider restrictors to maintain ventilation while limiting opening distance.
• Reinforce existing latches with secondary locks for vertical or horizontal windows.

No setup can guarantee prevention, but combining hardware and good placement can help deter attempts. Always follow instructions and keep escape routes accessible.

Pricing varies by design and features, so it helps to compare what you need to what each item offers.

• Material and build: Heavier steel or iron and thicker tubing typically cost more than lighter builds.
• Adjustability and size range: Wider extension ranges and extra segments add complexity.
• Mounting style: No drill tension bars versus screw in brackets and included hardware can affect price.
• Safety features: Quick release mechanisms on guards for emergency egress may add cost.
• Finish and durability: Powder coated or stainless finishes for humid areas can be a premium.
• Pack quantity and specialty use: Multi packs or AC specific bars may be priced differently.

Installation labor also varies; many options are DIY friendly.

There are a few hardware solutions you can use together for added deterrence. Choose what fits your window type.

1. Block the track with an adjustable security bar on horizontal sliders. Place it snugly at the bottom or midway for ventilation.
2. Add lock clamps or pins to the sliding rail to prevent the sash from moving.
3. Use a sash or restrictor lock on vertical windows to limit lift.
4. Fit a window guard where fall prevention is a concern, selecting quick release where required.

Measure carefully, install per instructions, and test that you can still exit in an emergency. No single device is foolproof, but combining them can help reduce unauthorized opening.

Restrictors limit how far a window can open, which can help deter quick, opportunistic attempts and support child safety or ventilation goals.

• What they do well: Keep a partial opening, reduce leverage, and add a hurdle to forced entry.
• Where they fall short: They are not primary locks and may not resist sustained force or tools.
• Best use: Pair with a core lock or a security bar on sliding tracks, and consider a guard on higher risk windows.

Installation quality and the window frame condition matter a lot. Restrictors are most effective as part of a layered setup rather than a standalone solution.

You can add security without removing the AC by focusing on the remaining open gap and the sash.

1. Measure the clear opening above or beside the AC to find the span you need.
2. Use a short range lock bar designed for windows with ACs, or an adjustable bar that fits the smaller space.
3. Position the bar in the track against the moving sash to block sliding.
4. Add a secondary sash lock or clamp to reinforce the existing latch.

Do not block emergency egress where required, and keep AC airflow unobstructed. Results vary by window style and installation, so test for a snug fit and easy removal if needed.