Description
The Smoke Pencil puffer stick is an air leak detector tool used to identify drafts in the home or building. Pull the trigger on the smoke puffer and see how the smoke moves to show the air movement. You control the amount of smoke by using the trigger. The smoke is a perfectly mixed non-toxic sweet smelling Glycol, Glycerin and water solution vapor. It comes with one 3oz non-toxic smoke fluid bottle. Simple to use, from HVAC technicians, Energy Raters/Energy Auditors, Fire Proofing Engineers, to DIY Homeowners
Features:
- Air leak detector
- 3oz Non-toxic smoke pencil
- LED tip flashlight built-in
- Works with optional blue adapter tip
- Operates on 6AA batteries
- Multi-function trigger controls smoke quantity
- Safe to take on a plane or shipped air-carrier
- Trigger locking pin for toolbox storage
- Robust impact-resistant molded body
- Pocket -size dimensions for easy stowage
- Dimensions: 5" x 4" x 2"
- Comes with direction sheet
Transportation Note: Other types of smoke sticks and smoke puffers have very dangerous chemicals or flammables in them. Most of these other smoke sticks can’t even be brought on a plane or sent via Air Package Carrier or US mail because of the dangerous chemicals they contain. This Smoke Pencil is different since it operates on a harmless glycol, glycerin and water vapor. Also the smoke fluid comes in a small 3 oz. bottle that is the allowable size by TSA.
Direction Sheet
Smoke Fluid MSDS Sheet
Watch: Smoke Pencil Demonstration
What Is a Smoke Pencil Air Leak Detector?
A smoke pencil air leak detector is a handheld diagnostic tool used to locate drafts and visualize airflow in homes and buildings. It works by releasing a thin stream of visible, non-toxic vapor that reacts instantly to air movement. When the smoke bends, wavers, or gets pulled in a specific direction, it reveals exactly where air is leaking or moving through gaps in the building envelope.
The Smoke Pencil Pro is designed for both professionals and homeowners who need a simple, reliable way to identify problem areas. HVAC technicians use it to diagnose duct leaks and airflow issues. Energy auditors rely on it during home performance testing to pinpoint inefficiencies around windows, doors, insulation gaps, and penetrations. It’s also useful for general troubleshooting anywhere air movement matters.
Unlike traditional smoke sticks that may contain flammable or hazardous chemicals, this tool uses a safe glycol and glycerin-based vapor. That makes it suitable for indoor use and compliant with transport regulations. With a controlled trigger and built-in LED tip, it gives you precise visibility so you can quickly find leaks, make targeted repairs, and improve overall energy efficiency.
How the Smoke Pencil Detects Drafts and Air Leaks
The Smoke Pencil works by making invisible air movement visible. When you press the trigger, the device releases a controlled stream of non-toxic vapor. As that smoke exits the tip, it immediately reacts to pressure differences and airflow in the surrounding space.
In a sealed area with no air movement, the smoke will rise or drift slowly. But near a leak, the behavior changes. The smoke may get pulled toward a gap, pushed away from a surface, or move in a steady direction. These subtle shifts show you exactly where air is entering or escaping, whether it’s around window frames, electrical outlets, duct joints, or attic penetrations.
This method is especially effective because it provides real-time feedback. Instead of guessing where a draft might be coming from, you can see the airflow pattern instantly and follow it back to the source. That makes it easier to confirm problem areas, test repairs, and verify that sealing or insulation work has actually stopped the leak.
The adjustable trigger gives you control over how much smoke is released, allowing for both quick checks and more detailed inspections. Combined with the built-in LED tip, you can clearly track airflow even in tight or low-light spaces like crawlspaces, basements, and mechanical rooms.
Key Features of the Smoke Pencil Pro
The Smoke Pencil Pro is built to be practical in the field while giving you precise control during inspections. Each feature is designed to make airflow detection easier, safer, and more reliable.
Non-Toxic Smoke Fluid for Safe Indoor Use
The device uses a glycol and glycerin-based vapor that is non-toxic and safe for indoor environments. This allows you to test airflow in occupied spaces without introducing harmful chemicals, making it ideal for homes, offices, and job sites.
Built-In LED Tip for Better Visibility
A small LED light at the tip helps illuminate the smoke stream, so you can clearly track airflow even in dim or enclosed areas. This is especially useful when working around ductwork, behind appliances, or inside mechanical rooms.
Adjustable Trigger for Precise Smoke Control
The multi-function trigger lets you control how much smoke is released. Use a light press for subtle airflow detection or a stronger press when you need a more visible stream to track larger leaks.
Compact, Pocket-Sized Design
With its small footprint, the Smoke Pencil Pro is easy to carry and store. It fits comfortably in a toolbox or pocket, so it’s always within reach during inspections or service calls.
Durable, Impact-Resistant Construction
The molded body is built to handle real-world job conditions. It stands up to drops, bumps, and regular use without compromising performance.
Battery-Powered for Cordless Operation
Powered by 6 AA batteries, the unit operates without cords or external power sources. This makes it easy to use anywhere, from tight crawlspaces to large commercial buildings.
Travel-Safe and Jobsite Friendly
Unlike many traditional smoke tools, this device uses a non-flammable fluid in a TSA-compliant size. It can be transported safely by air or shipped without restrictions, making it a practical option for professionals on the move.
Frequently Asked Questions
How accurate is a smoke pencil for detecting air leaks?
A smoke pencil is highly effective for pinpointing air movement in real time. While it doesn’t measure airflow quantitatively, it clearly shows the direction and presence of leaks, making it ideal for identifying gaps, drafts, and problem areas during inspections.
Is the smoke from the Smoke Pencil safe to use indoors?
Yes, the smoke is made from a non-toxic blend of glycol, glycerin, and water. It’s safe for indoor use in homes and commercial spaces when used as directed, without introducing harmful or flammable chemicals.
How long does the 3oz smoke fluid bottle last?
The lifespan depends on how often and how heavily the device is used. For typical inspections, a 3oz bottle can last through multiple jobs, especially when using the adjustable trigger to control the amount of smoke released.
Do I need professional experience to use a smoke pencil effectively?
No, the Smoke Pencil is designed to be simple and intuitive. Homeowners can use it to find drafts around windows, doors, and outlets, while professionals can use it for more advanced HVAC diagnostics and energy audits.
