Waking Up to Streaming Windows?
Water pooling on the sills. Black mould in the corners. That damp smell that won't shift. In Ireland's climate, condensation isn't just annoying — it's damaging your property and your health.
SEAI Grant Eligible
Optim Vent
Damp. Cold. Stale. Draughty.
It Ends Here.
One unit per room. No ductwork. Fresh, warm, filtered air — offices, clinics, retail, and homes.
Trusted in Irish homes and businesses nationwide
| SEAI Grant Eligible
The Challenge
Is Your Building Breathing Properly?
Older homes, airtight new builds, busy offices, cramped treatment rooms — poor ventilation causes the same problems everywhere. These are the issues we hear about every day.
Losing Heat Every Time You Open a Window?
Whether it's a draughty 1970s semi or a busy GP waiting room, opening windows in an Irish winter means money out the door. With energy costs 40% above the EU average, it shouldn't be a choice between fresh air and affordable heating.
Is Poor Air Quality Affecting Health?
Someone in Ireland is hospitalised for asthma every 7 minutes. Stale indoor air — CO2, dust mites, VOCs from furniture — is a silent contributor in bedrooms, classrooms, and waiting rooms alike. Staff, patients, and families all breathe the same air.
Draughty Trickle Vents Letting in Cold Air?
Trickle vents let in cold, unfiltered air and kill your heating. On a windy night, they're worse than useless. In older buildings without them, people just open windows and lose even more heat.
Optim Vent solves all four — without compromise.
See the solution The Solution
One System. All Four Problems Solved.
Condensation
Moisture Extraction
Optim Vent continuously extracts humid air, keeping moisture in check automatically. Wake up to clear, dry windows and walls — no more repainting mouldy corners. Even in the wettest Irish winter.
Heat Loss
97% Heat Recovery
A ceramic core captures warmth from outgoing air and pre-warms incoming air to near room temperature. Continuous ventilation without opening a window or watching your bills climb.
Poor Air Quality
F7 Filtration
Every breath of incoming air passes through an F7 filter before it reaches your lungs. Dust, pollen, allergens — captured. Clean air for bedrooms, consulting rooms, and reception areas alike.
Draughty Trickle Vents
Controlled Ventilation
Optim Vent delivers a continuous, controlled supply of filtered, pre-warmed air. Proper ventilation that works with your heating, not against it — in any building.
Customer Stories
What Our Customers Say
Real experiences from homeowners and businesses who transformed their spaces with Optim Vent.
Condensation completely gone
We had terrible condensation every winter — water streaming down the windows, mould creeping into the corners. Since we got the Optim Vent put in, it's completely gone. The house feels fresher and, to be fair, our heating bills have dropped noticeably too.
Asthma symptoms improved
My daughter has asthma and was always struggling. The air filtration has made a real difference — she's sleeping better and using her inhaler far less. The fact that we can keep windows closed during pollen season and still have fresh air... I wish we'd done it years ago.
€40/month savings
I was a bit skeptical about the savings claims, if I'm honest. But our gas bill is down about forty euro a month since we got them in. And the house is actually warmer because we're not opening windows anymore. In Galway, keeping windows shut in winter is worth the price alone.
Whisper quiet operation
What surprised me most was how quiet it is. I was worried about fan noise, but you genuinely can't hear it running. We leave it on 24/7 and the air quality in the house has been transformed. Even the kids are sleeping better.
Transformed a dental practice
We run a small dental practice in a 1990s building — the waiting room was always stuffy, and we had condensation on the windows every morning. Since we got Optim Vent installed in three rooms, the air quality is noticeably better and patients have commented on it. Great investment for any practice.
Mould gone after years of trying
Our house was built in 1983 and we've battled damp and mould for years — tried dehumidifiers, trickle vents, painting over it with anti-mould paint. Nothing lasted. Optim Vent has been in six months now and the mould hasn't come back. We should have done this years ago.
Compare
How Does Optim Vent Compare?
See how Optim Vent stacks up against the solutions people typically try first.
| Feature | Open Windows | Extractor Fan | Dehumidifier | Trickle Vents | Optim Vent |
|---|---|---|---|---|---|
| Removes condensation | Partially | Partially | Yes | Partially | Yes |
| Prevents mould | No | No | Partially | No | Yes |
| Recovers heat | No | No | No | No | 97% |
| Filters air | No | No | No | No | F7 |
| No draughts | No | Yes | Yes | No | Yes |
| Running cost/year | €0 + heat loss | ~€30 | ~€150 | €0 + heat loss | ~€10 |
| Noise level | Wind / traffic | Loud | Moderate | Draughts | < 33dB |
Removes condensation
Open Windows Partially
Extractor Fan Partially
Dehumidifier Yes
Trickle Vents Partially
Optim Vent Yes
Prevents mould
Open Windows No
Extractor Fan No
Dehumidifier Partially
Trickle Vents No
Optim Vent Yes
Recovers heat
Open Windows No
Extractor Fan No
Dehumidifier No
Trickle Vents No
Optim Vent 97%
Filters air
Open Windows No
Extractor Fan No
Dehumidifier No
Trickle Vents No
Optim Vent F7
No draughts
Open Windows No
Extractor Fan Yes
Dehumidifier Yes
Trickle Vents No
Optim Vent Yes
Running cost/year
Open Windows €0 + heat loss
Extractor Fan ~€30
Dehumidifier ~€150
Trickle Vents €0 + heat loss
Optim Vent ~€10
Noise level
Open Windows Wind / traffic
Extractor Fan Loud
Dehumidifier Moderate
Trickle Vents Draughts
Optim Vent < 33dB
Features
Why People Choose Optim Vent
Advanced heat recovery technology designed for Irish buildings and weather conditions.
Energy Efficiency
Up to 97% Heat Recovery
Whether it's a busy office, a consulting room, or an older home, Optim Vent's ceramic heat regenerator captures warmth from outgoing stale air and transfers it to incoming fresh air. You get continuous ventilation without the energy penalty of open windows. At 7.8W, it costs less than a phone charger to run.
- Up to 30% reduction in heating bills
- Fresh air pre-warmed to near room temperature
- Works in Ireland's coldest winters
- Antibacterial ceramic core with 10-year treatment
Health & Comfort
Filtered Fresh Air, Every Breath
Every breath of incoming air passes through an F7-rated particle filter, capturing dust, pollen, and common allergens. Unlike opening windows, Optim Vent gives you fresh air without pollen, traffic pollution, or outdoor allergens — in homes, clinics, or workplaces.
- F7 filtration captures 85%+ of airborne particles
- Ideal for hay fever and allergy sufferers
- Pollen season without closing yourself in
- Auto-shutter prevents draughts when off
Condensation Control
Say Goodbye to Condensation
Condensation on windows, damp patches, and mould are signs of trapped moisture — and they're worst in older buildings with poor ventilation. Optim Vent continuously extracts humid air while its CO2 and humidity sensors automatically adjust ventilation — keeping every room dry, at whisper-quiet levels under 33dB.
- Eliminates window condensation
- Prevents mould and mildew growth
- Built-in humidity and CO2 sensors
- Under 33dB — quieter than a library
Savings Calculator
How Much Could You Save?
Get a personalized estimate of your potential heating bill savings with Optim Vent — whether for your home or business.
€50€150/month€400
Adjust the options and click
Calculate My Savings
* Savings estimates are based on typical Irish properties and may vary. Actual savings depend on usage patterns, property characteristics, and local energy prices.
How It Works
Simple 3-Step Process
Getting Optim Vent installed is straightforward — whether it's one room or an entire building. We handle everything from assessment to installation.
1. Free Assessment
We visit your business premises or home, check your ventilation needs room by room, and recommend the right configuration. No obligation — just straightforward advice.
2. Quick, Clean Installation
Each Optim Vent unit installs directly into an external wall — one core hole per room, no ductwork, no attic work. Most rooms are done in under two hours with minimal disruption.
3. Fresh Air From Day One
Start breathing cleaner air immediately. The built-in sensors adjust ventilation automatically, and the app lets you monitor air quality, set schedules, and adjust from your phone.
Technical Specifications
Built for Performance
Optim Vent is engineered to deliver exceptional results in any Irish building.
Performance
- Heat Recovery Efficiency
- Up to 97%
- Room Coverage
- Up to 500 sq ft per unit
- Filter Rating
- F7 (MERV11)
- Power Consumption
- 7.8W
Noise & Comfort
- Operating Noise
- < 33 dB(A)
App & Control
- Sensors
- Humidity, CO2, Temperature
- Control
- iOS/Android app, Wall Controller
- Connectivity
- WiFi (Alexa & Google compatible)
- Auto Mode
- Demand-controlled ventilation
Physical
- Installation
- Wall-mounted (external wall)
- Ductwork
- None required (single-room unit)
Warranty & Maintenance
- Warranty
- 5 years (extendable to 10)
- Filter Life
- 6-12 months
- Ceramic Core
- Antibacterial, 10-year treatment
- Service Interval
- 2-3 years recommended
Want the complete technical documentation?
Request Full Specifications Common Questions
Optim Vent FAQ
Everything you need to know about heat recovery ventilation for Irish homes and businesses.
What is Optim Vent and how does it work?
Optim Vent is a single-room energy recovery ventilation (ERV) unit that mounts directly into an external wall. It continuously extracts stale, humid air and brings in filtered fresh air — while recovering up to 97% of the heat that would normally be lost. No ductwork or attic installation required. It works in any building with an external wall — houses, offices, surgeries, shops, and more.
How much can I save on heating bills with Optim Vent?
Customers typically see up to 30% reduction in heating costs. By recovering heat that would otherwise escape through open windows or extractor fans, Optim Vent significantly reduces the energy needed to maintain comfortable temperatures. The unit itself costs approximately €10 per year to run (7.8W).
Will Optim Vent help with condensation and mould?
Yes, eliminating condensation is one of the primary benefits. By continuously removing moisture-laden air and replacing it with dry, filtered fresh air, Optim Vent prevents the conditions that cause condensation on windows and walls — and the mould growth that follows. Many customers report their condensation problems disappearing within weeks.
Why is there black mould in my bedroom?
Bedrooms are the worst-hit rooms for mould because you breathe out moisture all night — up to a pint per person. In a closed, unventilated room, that moisture condenses on cold walls and window reveals, feeding mould growth. Opening the window in the morning helps briefly, but the cycle repeats every night. Optim Vent breaks this cycle by continuously extracting humid air and replacing it with dry, filtered fresh air — 24/7, even while you sleep — so moisture never builds up enough to cause condensation or mould.
Do trickle vents actually work?
Trickle vents provide some background ventilation, but they have serious limitations: no heat recovery (cold air comes straight in), no filtration (dust, pollen, and pollution enter freely), and they create draughts — especially in exposed or windy locations. In Ireland's climate, many people close them to keep warm, defeating the purpose entirely. Optim Vent is the proper upgrade: it ventilates continuously with 97% heat recovery, F7 filtration, and zero draughts.
What's the difference between condensation damp and rising damp?
Condensation damp is caused by excess moisture in the air meeting cold surfaces — streaming windows, damp patches on walls, and mould in corners. It's a ventilation problem, and Optim Vent solves it by removing humid air and preventing condensation from forming. Rising damp and penetrating damp are structural issues — moisture entering through walls or foundations. If you see damp patches at ground level with a visible tide mark, or damp after heavy rain, that's likely structural and you should get a surveyor to inspect. The good news: most damp in Irish homes is condensation damp, which is the easiest to fix.
Can Optim Vent replace trickle vents?
Yes — and it's a significant upgrade. Trickle vents let in cold, unfiltered air with no heat recovery. Optim Vent provides continuous ventilation with 97% heat recovery, F7 filtration that captures 85%+ of airborne particles, and automatic humidity control. There are no draughts, no noise from wind, and no heat loss. Each unit covers up to 500 sq ft and installs into the external wall with minimal disruption.
Does Optim Vent comply with Building Regulations Part F?
Optim Vent is a mechanical ventilation system that meets the ventilation requirements set out in Building Regulations Technical Guidance Document F (TGD F). It provides continuous background ventilation with heat recovery, making it suitable for both new builds and renovations where adequate ventilation must be demonstrated for building control sign-off.
How does Optim Vent improve indoor air quality?
Optim Vent uses F7-rated filters that capture 85%+ of airborne particles including dust, pollen, and common allergens. It continuously replaces stale indoor air with filtered fresh air, removing CO2 buildup, VOCs from furniture and cleaning products, and cooking odours — all without opening windows or losing heat.
Is Optim Vent good for people with allergies or asthma?
Absolutely. The F7 filtration removes pollen, dust, pet dander, and other allergens from incoming air. Unlike opening windows, which can bring in pollen and pollution, Optim Vent provides fresh air that's been thoroughly filtered. Many allergy and asthma sufferers report significant improvement in symptoms.
How quiet is Optim Vent?
Optim Vent operates at under 33dB — quieter than a library. You can run it 24/7 without noticing it, even in bedrooms and nurseries.
How is Optim Vent installed?
Each Optim Vent unit is installed directly into an external wall — one core hole per room, no ductwork, no attic work needed. Most rooms are completed in under two hours with minimal disruption. Our installers handle everything, including making good around the unit.
How much does it cost to run?
Optim Vent uses just 7.8W of power — less than a phone charger. Running 24/7, that works out to approximately €10 per year in electricity.
How many units do I need?
Each unit covers up to 500 square feet. A typical 3-bedroom semi-detached house needs 2-3 units. A small office or clinic might need 2-4 depending on room sizes. During your free assessment, we measure each room and recommend the right configuration for your property.
Can I control Optim Vent with my phone?
Yes. The app (iOS and Android) lets you monitor air quality, adjust settings, set schedules, and receive filter change reminders from anywhere. You can also control it via the wall-mounted controller, or through Alexa and Google Assistant.
Does Optim Vent work in offices, clinics, and shops?
Yes — Optim Vent is ideal for any room with an external wall. It's already installed in dental practices, GP surgeries, solicitors' offices, crèches, cafés, and retail units across Ireland. Commercial premises often have the same ventilation problems as homes — condensation, stale air, poor air quality — and Optim Vent solves them the same way, room by room, with no disruption to your business.
Is Optim Vent suitable for older buildings?
Absolutely — older buildings are often where Optim Vent makes the biggest difference. Pre-2000 homes and commercial premises typically have poor ventilation, no mechanical systems, and chronic problems with damp, condensation, and mould. Optim Vent is a retrofit solution that installs into any external wall without ductwork or structural changes, making it perfect for older properties where a full MVHR system isn't practical.
Do I need planning permission to install Optim Vent?
In most cases, no. Installing Optim Vent is considered exempted development under Irish planning regulations — it requires only a single core hole in an external wall, similar to an extractor fan. However, if your building is a protected structure or located in an architectural conservation area, you should check with your local planning authority before installation.
Your Building Shouldn't Make You Sick.
Get a free, no-obligation assessment for your home or business. We'll tell you exactly what you need, what it costs, and what SEAI grants you qualify for. Straight answers, no sales pressure.
Free Assessment
SEAI Grant Eligible
5-Year Warranty