BuzzSkito Mosquito & Tick Control Specialists · Published July 21, 2026
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What the Longray TS35A Actually Is
The Longray TS35A is a gasoline-powered pulse-jet thermal fogger — the flagship of the class of foggers a serious homeowner or small operator can actually buy, and the machine that most closely mirrors what professional mosquito crews carry into the field. When people picture “fogging for mosquitoes” — the technician walking a treeline trailing a rolling cloud of white fog that hangs in the shrubs — this is the category of tool doing it. Longray is a long-established name in the fogger world, which matters more than it sounds: for a machine you intend to run season after season, the availability of barrels, coils, and spare parts is a real part of the value.
What separates it from the plug-in electric foggers most homeowners start with is the engine. A pulse-jet has no fog-path pump and no electrical tether. That gives it three advantages that define who should buy it: it is cordless and roams an entire property, it heats fast, and it produces a genuinely large volume of dense fog. Those are acreage advantages. On a small lot near an outlet, they are wasted.
How a Pulse-Jet Thermal Fogger Works
The physics is genuinely interesting, and understanding it explains both the strengths and the risks. A pulse-jet engine burns a gasoline–air mixture in a rapid series of tiny detonations — dozens per second — inside a resonating combustion chamber, the same principle that powered early pulse-jet aircraft. That combustion superheats a long metal barrel. Fog solution is then metered into the hot barrel, where it flash-vaporizes; the instant that vapour hits cooler outside air it condenses into an ultra-fine mist of roughly 5–30 micron droplets.
Two things follow from that. First, the droplets are far smaller than any pump sprayer or backpack unit can make — fine enough to behave almost like smoke, drifting and swirling through vegetation rather than falling straight down. Second, because the fog is created by heat rather than a mechanical pump, there are no moving parts in the fog path to wear out, which is why professional-grade pulse-jets are so durable. The trade-off is right there in the description: gasoline combustion and a barrel hot enough to flash-vaporize liquid means this is a machine with a real fire and burn profile, not a garden gadget.
Why Thermal Fog Is So Effective Against Mosquitoes
Thermal fogging works because it goes exactly where mosquitoes hide. Adult mosquitoes do not spend the day in the open — they rest in cool, shaded, humid microhabitats: the undersides of leaves, the dense interior of shrubs and hedges, ivy and ground cover, tall grass, and the shaded structure under decks and around sheds. A coarse droplet from a pump sprayer largely rains down onto the tops of surfaces. A 5–30 micron thermal-fog droplet does something different: it drifts into that layered canopy, swirls around foliage, and settles onto the hidden undersides where a blood-seeking female is actually sitting.
Combine that penetration with the sheer number of droplets a thermal fogger puts into the air and you get rapid, wide-area knockdown of the adult population — which is precisely why thermal fogging is a staple of municipal and professional mosquito programs, and why it is the classic tool for clearing a large space before an outdoor event. If you want the deeper comparison of trap-and-kill devices against area treatment, our best mosquito trap guide covers where each approach fits.
Coverage, Droplet Size, and Output — What the Numbers Mean
Thermal foggers are volume machines. A full tank of a unit in the TS35A class will treat a large residential lot up to a small acreage in a single fill, with real-world coverage swinging widely based on your flow-rate setting, walking speed, and how densely you choose to treat. That scalability is the whole point of buying a pulse-jet: at a moderate flow setting you can lay down fog over an acre or more of open ground quickly. It is also the clearest signal of who should not buy one — if your property is small enough that coverage was never in doubt, the coverage you are paying for is coverage you will never use.
On droplet size, finer is not automatically better; it is situational. The 5–30 micron range a thermal fogger produces is ideal for outdoor penetration and drift-through-foliage coverage. It is less controllable than the adjustable droplet of a ULV cold fogger, and it is the wrong tool for enclosed indoor spaces where a near-invisible, precisely-sized cold-fog droplet is safer and cleaner. Choose the machine to match the space.
Oil-Based vs Water-Based Solution
This is where many first-time buyers go wrong. Thermal foggers like the TS35A are designed primarily around oil-based (petroleum or food-grade carrier) fog solutions, because oil vaporizes cleanly in the hot barrel and produces the dense, long-hanging fog thermal machines are prized for. Some thermal units accept water-based solution with a dedicated water-fog adapter, but water-based fogging is fundamentally the job of a ULV cold fogger, not a thermal one. Running the wrong carrier can produce weak fog, clog the barrel, or — more importantly in Canada — constitute an off-label and therefore illegal application. The pesticide label, not the machine manual and not this article, is the legally binding authority on what carrier and method are permitted.
What You Can Legally Fog in Ontario and Canada
This is the section US-based fogger reviews skip entirely, and it is the one that matters most. The fogger itself is unregulated hardware — what you put in it is tightly regulated on two levels:
- Federal (PMRA). Every pesticide used in Canada must be registered with Health Canada’s Pest Management Regulatory Agency and carry a PCP registration number. Products are classed Domestic, Commercial, or Restricted. Homeowners may only use Domestic-class products, the label is legally binding, and — critically — the label must specifically permit thermal fogging and the carrier you are using.
- Provincial (Ontario). Ontario’s cosmetic pesticides ban (O. Reg. 63/09 under the Pesticides Act) prohibits many lawn-and-garden pesticide uses outright, with defined pathways for health-protection uses such as West Nile virus mosquito control. Commercial-class residual products — the ones professional companies apply — require an Ontario exterminator licence.
- The import trap. The vast majority of “fogging concentrates” marketed to thermal-fogger owners online are US products that are not PMRA-registered. Importing and using them here is illegal, unregistered product can be seized at the border, and applying it voids any legal protection if something goes wrong.
The practical takeaway: buying the machine is the easy part; sourcing a PMRA-registered, thermal-fog-labelled, Domestic-class product to run through it legally is the genuine constraint for a Canadian homeowner. For the broader picture of what is and isn’t registered here, our backpack sprayer guide walks through the same PMRA and Ontario framework in detail.
Safety: Respect the Machine
A pulse-jet thermal fogger demands a level of caution a garden sprayer does not. It runs on gasoline and produces a barrel hot enough to flash-vaporize liquid, so the fire and burn risk is real and non-negotiable:
- Never fog near open flame, dry brush, or flammable structures. Keep a fire extinguisher within reach, and let the barrel cool completely before storing the unit.
- Protect your airway and skin. The fog is a fine pesticide aerosol you must not inhale — wear proper respiratory protection, sealed eye protection, chemical-resistant gloves, and long sleeves.
- Clear the zone. Keep people and pets out of the treated area until the fog has settled and the re-entry interval on the product label has passed.
- Fog only in calm conditions. Never fog toward your house, a neighbour’s property, or a water body, and stop if the wind picks up — fine fog drifts easily.
How to Decide: Is a Pulse-Jet Fogger Right for Your Property?
Because this is a high-ticket purchase, it is worth being clear-eyed about who genuinely benefits. Match your situation to the tool:
- Large or remote property (buy the pulse-jet). Acreage, cottages near water, campgrounds, hobby farms, barns, and commercial grounds are exactly what a cordless, high-volume thermal fogger is built for. Nothing a homeowner can otherwise buy covers that scale as fast.
- Frequent treatment or event work (buy the pulse-jet). If you fog often, or you need rapid same-day knockdown before weddings, parties, and outdoor events across a big space, the machine earns its keep.
- Small-to-mid suburban lot near an outlet (buy electric instead). An electric thermal fogger does this job for a fraction of the price, fuel, and PPE — see our review before overspending.
- Consistent residual barrier coverage (choose a sprayer or a service). If your real goal is weeks of protection rather than instant knockdown, a battery backpack sprayer or professional barrier spray is the better mechanism.
- Indoor or enclosed-space fogging (choose ULV cold). Heat and gasoline have no place indoors; a ULV cold fogger is the correct, safer tool there.
Put simply: buy the TS35A for scale, mobility, and knockdown power. Do not buy it as a premium substitute for a job a $150 tool already does well.
What You’re Actually Paying For
A pulse-jet fogger sits at the top of the price range for consumer-accessible fogging equipment, and the honest question is which parts of that premium earn their cost for your use. You are paying for cordless gasoline mobility (worth a lot on acreage, nothing on a small lot near a plug), for large fog volume and fast heat-up (worth a lot if you treat big or often), and for durable, well-supported professional-grade build (worth a lot if you plan to run it for years). What you are not buying is longer-lasting protection — residual is a product property, not a machine feature — or any advantage indoors, where cold ULV is safer and better.
Factor in the running costs a spec sheet won’t: gasoline, a legal supply of PMRA-registered fog solution, and proper PPE on every single use. For a large-property owner treating frequently, that total still comes out ahead of the alternatives. For a typical suburban homeowner, it rarely does — which is the honest pivot to the comparison below.
Fogger vs Professional Barrier Spray for a GTA Property
A thermal fogger and a barrier spray solve different problems, and the smartest large-property owners often use both. Fogging delivers fast adult knockdown across a big area — perfect for the evening of an event. Barrier spray deposits a residual film on vegetation that keeps killing mosquitoes that land on the leaves for 21–30 days, covers the whole yard, and — unlike any fog — also controls ticks. Here is how the options stack up:
| Solution | Best at | Duration | Tick coverage |
|---|---|---|---|
| Pulse-jet thermal fogger | Fast large-area knockdown | Knockdown (residual = product) | Limited |
| Electric thermal fogger | Small-yard knockdown near an outlet | Knockdown (residual = product) | Limited |
| Battery backpack sprayer | DIY residual barrier on a lot | Days–weeks (product) | Yes, with the right product |
| Professional barrier spray | Whole-yard residual control | 21–30 days | Yes — full coverage |
For a genuinely large or remote property, a Longray for knockdown plus barrier work for the residual is a defensible stack. For a typical Mississauga, Brampton, or Oakville backyard, professional barrier spray alone usually delivers longer-lasting, tick-inclusive control for less first-year cost than a pulse-jet fogger plus fuel, product, and PPE — and hands you back every weekend the fogger would have eaten.
Frequently Asked Questions
Is the Longray TS35A thermal fogger worth it in Canada?+
For anyone treating a large property, acreage, a cottage, or a commercial site on a recurring basis, the Longray TS35A pulse-jet is worth it — it is the machine that most closely mirrors the professional thermal foggers pest crews actually run. Its gasoline pulse-jet engine flash-heats solution into a dense, driftless fog of roughly 5–30 micron droplets that hangs in the air and coats the shaded, layered vegetation where mosquitoes rest during the day. That is a genuine step above the plug-in electric foggers most homeowners start with. It is not the right buy for a small suburban lot treated twice a season — a battery backpack sprayer or an electric fogger does that job for far less money and hassle. Buy the TS35A when the scale of the property, or the frequency of treatment, justifies a professional-grade tool.
What is a pulse-jet thermal fogger and how does it work?+
A pulse-jet (or "pulse-detonation") thermal fogger burns a gasoline–air mixture in dozens of tiny detonations per second inside a resonating combustion chamber, exactly like the engines on early pulse-jet aircraft. That combustion superheats a barrel; fog solution is metered into the hot barrel, flash-vaporizes, and condenses on contact with cooler outside air into an ultra-fine thermal fog. The result is a huge cloud of tiny 5–30 micron droplets — far finer than any pump sprayer produces — that drifts through vegetation and settles onto leaf undersides and hidden surfaces. The pulse-jet design has no moving pump parts in the fog path, which is why professional-grade units like the Longray are so durable and produce such consistent output.
Longray TS35A vs an electric thermal fogger — which should I buy?+
They serve different buyers. An electric thermal fogger (Black Flag, Burgess, and similar plug-in or corded units) is cheaper, quieter, needs no gasoline, and is genuinely fine for a small-to-medium yard treated occasionally — but it is tethered to an outlet or extension cord, heats more slowly, and produces a smaller fog volume. The gasoline pulse-jet Longray TS35A is cordless, roams anywhere on the property, heats fast, and throws a far larger, denser fog cloud that covers acreage and dense hedgerows an electric unit cannot reach. If your property is small and near an outlet, buy electric. If it is large, remote, or you treat often, the pulse-jet earns its premium. Our companion best thermal fogger guide compares the whole class side by side.
Thermal fogger vs ULV cold fogger — what is the difference?+
A thermal fogger uses heat to create fog, producing an extremely fine, visible, smoke-like cloud (roughly 5–30 microns) that excels outdoors at penetrating dense vegetation and covering large open areas. A ULV (ultra-low-volume) cold fogger uses high-pressure air instead of heat, producing a slightly larger, adjustable, near-invisible droplet (often 5–50+ microns) with no fire risk and no visible fog. Thermal wins outdoors for reach, penetration, and sheer coverage; ULV wins for indoor and enclosed spaces, precise droplet control, and water-based products that heat would degrade. Many operators own both. Our ULV cold fogger guide breaks down when to choose cold over thermal.
What can I legally put in a thermal fogger in Ontario / Canada?+
Only a pesticide registered by Health Canada's Pest Management Regulatory Agency (PMRA) that carries a Pest Control Products (PCP) number and is labelled for the use and application method you intend — and only if it is Domestic class for homeowner use. Commercial and Restricted class products require a licensed exterminator. Ontario's cosmetic pesticides ban (O. Reg. 63/09 under the Pesticides Act) further restricts many lawn-and-garden uses, with specific pathways for health-protection uses such as West Nile virus mosquito control. Critically, the product label must permit thermal fogging and specify an oil-based or fog-compatible carrier — many US "fogging concentrates" heavily marketed to thermal-fogger owners are not PMRA-registered and are illegal to import or use here. The machine is unregulated hardware; what you put in it is not.
Does the Longray TS35A use oil-based or water-based fog solution?+
Thermal foggers like the TS35A are designed primarily for oil-based (petroleum or food-grade carrier) solutions, because oil vaporizes cleanly in the hot barrel and produces the dense, long-hanging fog thermal machines are known for. Some thermal foggers accept water-based solutions with a special water-fog adapter or nozzle, but water-based fogging is generally the job of a ULV cold fogger, not a thermal unit. Always match the carrier to both the machine's manual and the pesticide label — running the wrong carrier can produce poor fog, clog the barrel, or be an off-label (and in Canada, illegal) application. When in doubt, the PMRA-registered product label is the legally binding authority.
How much area does the Longray TS35A cover per tank?+
Coverage depends entirely on your flow-rate setting, walking speed, and how densely you treat, but as a working guide a full tank of a machine in this class treats a large residential lot to a small acreage in a single fill, and operators commonly cite output rates that cover an acre or more of open ground quickly at a moderate flow setting. The honest answer is that thermal foggers are volume machines built for scale — if your property is small enough that coverage was never a question, you are likely buying more machine than you need. For genuine acreage, cottages, campgrounds, barns, and commercial grounds, that coverage-per-tank is exactly the point.
Is a gasoline thermal fogger safe to use — what are the risks?+
Used correctly, yes, but a pulse-jet thermal fogger demands respect that a garden sprayer does not. It runs on gasoline and produces an extremely hot barrel and open-flame-adjacent combustion, so there is a real fire and burn risk: never fog near open flame, dry brush, or flammable structures, keep a fire extinguisher handy, and let the barrel cool fully before storing. The fog itself is a fine pesticide aerosol you must not inhale — wear proper respiratory protection, eye protection, gloves, and long sleeves, and keep people and pets out of the treated zone until the fog settles and the re-entry interval on the label has passed. Fog only in calm conditions, never toward your house, neighbours, or a water body.
Why does thermal fog work so well against mosquitoes?+
Because it goes where mosquitoes actually are. Adult mosquitoes spend the day resting in cool, shaded, humid vegetation — the undersides of leaves, dense shrub interiors, ivy, tall grass, and the shaded structure under decks and around sheds. A coarse pump-sprayer droplet rains down onto the tops of surfaces; an ultra-fine 5–30 micron thermal fog droplet drifts, swirls, and penetrates into that layered canopy, coating the hidden undersides where a blood-seeking female is hiding. That penetration and the sheer particle count are why thermal fogging can knock down an adult mosquito population fast over a large area, and why it is a staple of professional and municipal mosquito programs.
How long does thermal fog protection last?+
A thermal fog is mainly a knockdown tool — it excels at rapidly killing the adult mosquitoes present at the moment you fog, which is why it is the go-to for a same-evening event like a wedding, BBQ, or party. Residual duration depends entirely on the product you fog, not the machine: a straight knockdown product may give little lasting residual, while a residual-labelled product can extend protection for some days. This is the key difference from a professional barrier spray, which deposits a longer-lasting residual film on foliage that keeps killing mosquitoes that land for weeks. Many large-property owners fog for immediate knockdown before an event and rely on barrier treatment for sustained control.
Where can I buy the Longray TS35A in Canada?+
The Longray TS35A and its pulse-jet siblings are sold through Amazon.ca and specialist pest-control equipment suppliers, with Amazon typically offering the most straightforward Canadian shipping and return path. Longray is a long-established fogger brand, so parts, barrels, and consumables are reasonably available — an important consideration for a machine you intend to run for years. Confirm current Canadian availability and pricing before buying, and make sure the listing is the Canadian-market unit rather than a US grey-market import, which can complicate warranty and parts support.
Should I buy a Longray fogger or hire a professional mosquito service?+
Run the honest math on scale and product access. A pulse-jet fogger is a serious investment, and the product you can legally load as a homeowner is Domestic class — weaker than the commercial-class residual products licensed professionals apply. For a genuinely large or remote property you treat frequently, owning a Longray can make sense, especially for same-day knockdown before events. For a typical GTA yard, professional barrier spray delivers longer-lasting, commercial-class residual coverage, controls ticks as well as mosquitoes, and hands you back your weekends — usually for less first-year cost than a pulse-jet fogger plus fuel, product, and PPE. The two are not mutually exclusive: some acreage owners fog for knockdown and hire out the residual barrier work.
Related Reading
- Best Thermal Fogger Canada — Full Class Compared
- Best ULV Cold Fogger Canada — Thermal vs Cold
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- Best Pest Control Equipment Canada — The Full Hub
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