Double thermal wall
Two walls with an insulating air gap between them — the same principle as a thermo-pane window, applied to your vent.
Thermo-Trap installation · Ottawa & Gatineau
Replace old vent covers with Thermo-Trap.
Every vent is a hole in your wall. Thermo-Trap opens under airflow and seals airtight when idle, so the air you paid to heat or cool stays in, and drafts and pests stay out. Installed properly, backed by a 15-year guarantee.
5,000+ Thermo-Traps installed over 15 years
25% of a home's energy loss is air leakage — Hydro-Québec
80% of those leaks exit through vents
R-0 insulation value of a standard vent cover
Year-round upgrade
One replacement. Better vent performance in every season.
Old vent covers leak air, wear out, and leave your home exposed — in every season, not just winter. One Thermo-Trap replacement fixes that for good.
Winter: less cold backflow
Summer: less AC loss
All year: pest defense
Always: airtight seal at rest
The numbers
Your vent covers are quietly the biggest air leak in your house.
These aren't our numbers. They come from Hydro-Québec and a nine-month independent temperature study of the product.
25%
of a home's energy loss comes from air leakage, according to Hydro-Québec.
80%
of those leaks exit through ventilation outlets — dryer, range hood, bathroom fan, and air exchanger vents.
1950
is when the standard single-cover vent was designed. It hasn't changed since — and it has an insulation value of R-0.
~$80/yr
in energy is wasted by a single standard vent cover, every year, from air infiltration alone.
Temperature study
2,000 readings over nine months. The difference is night and day.
Temperatures were logged 16 inches inside the duct — behind a standard vent cover and behind a Thermo-Trap — for nine months, over 2,000 readings.
Standard louvers are thin, uninsulated, and often sit partly open from wind or lint — so outside air pours straight into the metal duct and drives the temperature up and down. In winter that moisture freezes at the opening, then thaws and refreezes, making the leak worse over time.
Install videos
Watch our Thermo-Trap installs step by step.
These three clips show exactly what sets us apart: we clean the dryer vent path, spray-foam seal the opening, and finish with clean exterior caulking. We install our own high-quality product and back every install with an unbeatable warranty.
Dryer vent cleaning
We start by fully cleaning out the vent path so the system is safe, clear, and ready for a proper upgrade.
Perimeter spray-foam sealing
We spray-foam seal every opening around the vent before trim goes on, so the airtight layer sits behind the finished face.
Final exterior caulking
We finish with clean perimeter caulking so the exterior seal is weather-tight, durable, and neat against the siding.
Thorough workmanship, premium product, unbeatable warranty.
Tap any video to watch it full screen.
How it's built
A double-walled thermal trap — built like a thermo-pane window.
Thermo-Trap isn't a better flap. It's a different design entirely, patented in Canada and the US and approved by CSA Group.
The porch principle
The outer trap shields the inner one from weather entirely — like a porch built in front of an entry door. Wind, rain, and cold never reach the seal.
Opens fully, seals at rest
Louvers swing fully open under airflow — no strain on your dryer or fan — then close 100% airtight the moment the appliance stops.
Solar-panel-grade material
Made of tough, recyclable polypropylene — the same material as rooftop solar panels. Guaranteed 15 years against fading, cracking, and drying out.
The difference
Our vents vs. the vent your home came with.
Every vent is a hole in your wall. The only question is what's covering it. Here's the difference in plain terms.
The vent cover your home came with
- Single-cover design unchanged since 1950 — insulation value R-0
- Thin plastic louvers that warp and crack in the cold
- Sticks open with lint, letting winter air blow into the duct
- Gaps big enough for birds, mice, and wasps
- Wastes roughly $80 per year, per vent, in lost energy
Thermo-Trap
- Double thermal wall with an insulating air gap — like a thermo window
- The only vent of its kind approved by CSA Group — and patented
- 100% insulated and 100% sealed when at rest
- Opens fully under airflow — no strain on your appliances
- Physically blocks birds and rodents from entering
- Keeps the air you paid to heat or cool inside, year-round
“As a construction contractor for 35 years, Thermo-Trap is the product I'd been waiting for. It's proof against insects, birds, mice, heat, cold, and UV — and it will last a good twenty years on your house. With the energy savings, the investment generally pays for itself in a few years.”
Before and after
Professional installations with a cleaner, tighter finish.
Real local installs — the visual difference as well as the functional one.
Before
After
Soffit dryer vent rebuild
An open hole with a taped foil duct sagging out of the soffit, replaced with a louvered Thermo-Trap on a sealed mounting plate, flush to the panel.
Before
After
Wall intake vent replacement
A worn fresh-air intake that drafted constantly, replaced on a proper mounting block, fully caulked, with a trap built for intake airflow.
Before
After
Clogged oven hood vent swap
Caked shut with grease and dust, with failing caulking — swapped for a sealed louvered unit that opens under airflow and closes tight when the hood is off.
Before
After
Insulated soffit box, colour-matched in black
A grimy, lint-packed, uninsulated hood replaced with our insulated soffit box, colour-matched in black so it disappears into the soffit.
Extremely impressed with the work — I'd definitely recommend it to my neighbours.
Happy and impressed with the product, and very happy with the installation.
Know the job, very professional, trustworthy and hard working team.
Install progress
How an install actually comes together.
A recent brick-home job photographed step by step — side-by-side exhaust openings, finished with vents colour-matched in black so they sit cleanly against the stone.
Rough openings
Both ducts exposed with open gaps around the brick — this is where conditioned air escapes and pests get in.
Foam-sealed perimeter
Every gap around both ducts gets sealed with expanding foam before anything is covered up, so the airtight layer is behind the vent, not just around it.
Vents mounted
Black mounting plates and louvered Thermo-Trap units screwed down over the sealed openings.
Finished pair
A matched set that blends into the brick, with louvers that open under airflow and drop closed on their own.
On-site installation
We show up professionally and on time.
Purple Property Services installs Thermo-Trap locally across Ottawa-area neighbourhoods. A local install team, not a distant distributor — real on-site assessments, a scheduled arrival we keep, and clean professional work from start to finish.
If you haven't heard of us, that's because we're new to Ottawa — not new to the work. Thermo-Trap was invented by our grandfather, and over the past 15 years our family has installed more than 5,000 of them across Quebec and Ontario. Read our story.
Products
Exhaust vent and intake vent.
Two models — one for air leaving the house, one for fresh air coming in.
Exhaust vent
Exhaust vent
Used on vents that push air out of the house.
- What it's for: Dryer exhausts, bathroom fans, kitchen hoods, central vacuum outlets, and HRV exhausts.
- Benefits: Helps stop drafts and cooling loss, keeps out birds and rodents, and stays airtight when not in use.
- Specs: CSA approved, fits standard 4-inch, 5-inch, and 6-inch vent ducts, and built for Canadian year-round conditions.
Intake vent
Intake vent
Used on vents that pull fresh air into the house.
- What it's for: HRV and air exchanger intake vents.
- Benefits: Lets fresh air in while helping reduce drafts and backflow.
- Specs: Designed specifically for intake airflow, fits standard 4-inch, 5-inch, and 6-inch vent ducts, CSA approved, patented in Canada and the US, with a 15-year factory warranty.
Thermo-Trap isn't sold in stores.
Installation must be done by a certified Thermo-Trap distributor and installer — that's what keeps the system truly airtight and the 15-year warranty valid. Purple Property Services is the certified installer for the National Capital Region, and replacement parts are always available through us.
We handle the full install and supply everything needed: the right Thermo-Trap unit, mounting plate or block, sealants, fasteners, and finishing materials for your vent type.
Soffit vents
Soffit vents get our insulated soffit box — 100% insulated, 100% sealed.
Vents that exit through the soffit face a problem wall vents don't: moist exhaust air hits freezing winter air right at the eave. We install every soffit vent inside a colour-matched, fully insulated soffit box built to stop that.
Inside the box
This is what we install above your soffit.
Every box is packed with closed-cell foam insulation around the duct collar before it goes up. The insulation keeps the vent and the air inside it above freezing, and the sealed shell stops conditioned air from escaping into the attic or outside.
- 100% insulated around the entire duct connection
- 100% sealed — no gaps into the soffit or attic
- Keeps the vent from freezing shut in winter
Colour matched
Matched to your soffit, not stuck onto it.
Each box is colour-matched to the soffit it's mounted on — white on white, black on black — so the finished install looks like part of the house instead of an add-on.
- Colour-matched to your existing soffit panels
- Clean, flush mounting at the eave
- Louvers open under airflow and seal closed at rest
What happens without one
An unprotected soffit vent leaks drafts in and freezes itself shut.
Without an insulated box, cold air drafts straight through the soffit vent into your home. Worse, the warm moist exhaust freezes on the cold metal at the eave — and that repeated freeze-and-thaw warps the vent, duct, and soffit over time. It's damage you can't see from the ground.
Why people install it now
Avoid the $250 - $500 exterminator call for a single vent problem.
Thermo-Trap helps prevent birds, rodents, and other pests from getting into vents in the first place. It is a cleaner long-term fix than waiting for a problem that usually costs more under pressure.
The payback math
It typically pays for itself in about two to three years — then keeps saving for twenty.
A standard vent cover wastes roughly $80 a year per vent in lost energy. Across a typical home that adds up to thousands of dollars over the life of the vents. Replace them with Thermo-Trap and the install usually pays for itself within about two to three years — on a unit built to last around twenty. Your free assessment includes a savings estimate for your home.
Service area
Thermo-Trap installations across the National Capital Region.
Serving homeowners in Ottawa, Gatineau, Hull, and nearby communities looking for a better long-term vent solution.
- Ottawa
- Gatineau
- Hull
- Aylmer
- Kanata
- Nepean
- Orleans
- Barrhaven
- Stittsville
- Gloucester
- Westboro
- Chelsea
- Manotick
- Vanier
- Rockcliffe
- Greely
If you're nearby and don't see your area listed, reach out. We likely cover it.
FAQ
Questions people ask before installing Thermo-Trap.
Quick answers to the most common ones. Anything else, call or text 613-315-5458 and we'll walk you through it.
Can I buy a Thermo-Trap and install it myself?
No. Thermo-Trap is not available in stores — installation must be done by a certified Thermo-Trap distributor and installer in your area. That's what guarantees an airtight result and keeps the 15-year warranty valid. Purple Property Services is the certified installer for Ottawa and Gatineau, and replacement parts are always available through us.
Which vents can it be installed on?
Dryer exhausts, kitchen range hoods, bathroom fans, central vacuum outlets, and air exchanger (HRV) intakes and exhausts. It's compatible with standard duct sizes, and the reversible model is designed specifically for air intakes.
Will it restrict airflow or strain my dryer?
No. The louvers swing fully open under airflow, so your dryer or fan works no harder than it does now. Because the sealed trap keeps the duct drier and cleaner, dryer run times can actually drop — by up to 50% in some cases when the install guidelines are followed.
What is it made of, and where is it made?
Thermo-Trap is designed and manufactured in Quebec from tough, recyclable polypropylene — the same material used in rooftop solar panels. It's proof against insects, birds, rodents, heat, cold, and UV, and it's patented in Canada and the US.
How long does it last?
The product is guaranteed up to 15 years against discoloration, cracking, and drying out, and a unit will typically last around twenty years on your home. If one fails under normal use within 15 years of our installation, we replace it at no cost.
What does it cost?
It depends on how many vents you have and what type they are, so we quote after a free on-site assessment — exact pricing, no obligation. As a benchmark: a standard vent cover wastes roughly $80 a year in energy, so most installs pay for themselves in about two to three years.
Is it easy to clean?
Yes. The trap is designed to be cleaned easily without removing or breaking anything. We'll show you exactly how during the installation.
Is it really CSA approved?
Yes — Thermo-Trap is approved by CSA Group and is the only vent of its kind with that approval. You can verify the product, its specifications, and the warranty on the official manufacturer site at thermo-trap.net.
Free consultation
Book your assessment and upgrade your vents for year-round benefits.
We will review your vent setup, estimate potential savings, and give you a clear quote for installation.