Breathe Easy with Clean Ventilation Systems
Your ventilation system is your home’s lungs — quietly circulating air every day. Over time, dust, mould, and allergens build up inside, affecting your family’s health and your home’s comfort.MiHT restores your system to peak condition, so you can breathe easy again.
Is Your Ventilation System Spreading Contamination Through Your Home?
New Zealand homes are among the most airtight in the Southern Hemisphere -- which is great for energy efficiency, but creates a serious problem when ventilation systems are not maintained. Dust, mould spores, and allergens build up inside ducts and filters over time. And every time the system runs, it pushes that contamination through every room in the house.
This is what we call the Healthy Home Blindspot.
The invisible circulation of allergens and pollutants through a system that was designed to protect your family's health. Most homeowners never notice it happening, because the system still turns on, the air still moves, and everything appears to be working. But appearances are not the same as performance.
Signs you may be experiencing the Healthy Home Blindspot:
A professional ventilation service removes the source of contamination -- cleaning ducts, filters, fans, and housings so your system does what it was designed to do: protect the air your family breathes.
Choose the Right Service for a Healthier, Fresher Home
Clean ventilation systems are vital for maintaining healthy indoor air quality. Our expert services ensure your home breathes fresh, filtered air.
Positive Pressure Ventilation System
Replace filters, clean fans and ducts, and maintain exterior grilles to ensure your system pushes in fresh air, not attic dust.
Balanced Ventilation System
Service includes thorough duct cleaning, filter clean or replacement, and airflow checks for optimal performance. We clean the core to maximize heat recovery and prevent energy waste
Extractor & Exhaust Systems
Rangehoods and inline fans. Remove grease, mould and moisture build‑up to keep your kitchen and bathrooms fresh and safe.
Positive Pressure Ventilation System
Positive pressure ventilation systems (like HRV®, DVS®, and other brands) are common in New Zealand homes, but most people don’t realise how dirty they get inside.
These systems work by gently pushing dry air from your roof space into your home to reduce condensation and improve air quality. But over time, filters clog, fans collect dust, and performance drops, leaving your home vulnerable to stale air, allergens, and musty smells.
Our professional clean restores your system’s airflow, improves indoor air quality, and ensures your home stays fresh and dry year-round.
We Don’t Just Clean — We Deep Clean
Most services just change the filters. We go deeper.
We open the unit, vacuum the fan, clean the housing, and inspect the intake area for pests, mould, or blockages. Filters are cleaned or replaced depending on the model, and we clean the ceiling diffusers so fresh air flows freely into every room.
We Check Airflow & Pressure
We make sure your system is still doing what it should, gently pressurising your home so moisture doesn’t build up.
If something’s off, we’ll tell you. You’ll get full transparency and peace of mind that your ventilation is actually working as designed.
We Inspect the Whole System
We inspect the ductwork for leaks, disconnections, or moisture issues, and clean the supply vents throughout the home.
It’s more than just a filter swap, it’s a full service to keep your system running right and your home breathing clean air.
We Show You the Results
Every service includes before & after photos and a detailed airflow report, so you can see what was done and why it matters.
Balanced Ventilation System
Balanced ventilation systems; like Smartvent, Lossnay, and Cleanaire units, are designed to keep your home filled with fresh air while retaining warmth. They work by exchanging stale indoor air with filtered outdoor air, often using a heat exchanger to reduce energy loss.
But over time, filters clog, fans slow down, and the core can accumulate dust, mould, or debris; reducing performance and spreading contaminants instead of removing them.
Our professional clean restores your system’s efficiency, improves airflow, and ensures your home gets the fresh, filtered air it was designed for, without the energy waste.
We Clean the Heat Exchange Core
The heart of a balanced system is the core, and it needs regular cleaning to work properly.
We remove and clean the core (where accessible), flush out any dust or buildup, and check for mould or moisture. This restores airflow and ensures you're getting the energy recovery you paid for.
We Replace or Clean Filters
We clean or replace both the supply and exhaust filters depending on system type.
A clogged filter means restricted airflow and stale indoor air, we ensure fresh, filtered air flows in and stale air flows out, as designed.
We Check & Clear the Drain
Most balanced systems collect condensation. If the drain is blocked, it can overflow or cause internal mould.
We flush and clear the drain line and trays to keep things flowing and prevent issues before they start.
We Inspect, Test & Balance
We check all vents, ducts, and intake/exhaust hoods — inside and outside your home.
Then we test airflow, check fan operation, and ensure the system is correctly balanced, bringing in and exhausting air at the right volumes.
We Show You the Results
Every job includes a visual inspection report, airflow test, and before/after photos, so you know exactly what was cleaned and how the system is performing.
Extractor & Exhaust System Cleaning
Bathroom fans, laundry extractors, and kitchen rangehoods are essential for removing moisture, odors, and airborne grease, but they get filthy fast.
Blocked or greasy fans can’t do their job properly. That leads to mouldy bathrooms, smelly laundry rooms, and a greasy film in your kitchen, all while making the fans louder and less efficient.
Our deep clean restores airflow, removes built-up grime, and helps your exhaust systems do what they’re meant to: keep your home fresh, dry, and safe.
We Clean Bathroom and Laundry Fans
We remove the ceiling grille, vacuum out the dust, lint, and mould, and clean the fan blades and housing.
Where accessible, we also vacuum the first part of the duct to ensure air is flowing freely. It’s a quick job, but the difference is noticeable.
We Degrease Kitchen Rangehoods
We remove and soak the metal mesh filters in degreaser, replace disposable charcoal filters if required, and clean the hood interior and fan chamber.
We finish by wiping down the surfaces and checking fan operation, so you get a clean, quiet, high-performing hood that removes smoke and smells properly.
We Inspect and Test
We check for blocked vents, mould buildup, worn motors, or loose fan mounts. We’ll test airflow and let you know if your fan or hood isn’t doing its job properly.
We Show You the Results
We check all vents, ducts, and intake/exhaust hoods, inside and outside your home.
Then we test airflow, check fan operation, and ensure the system is correctly exhausting air at the right volumes.
We Offer Multi-Fan Discounts
Cleaning two or more exhaust systems? Combine your bathroom fan, laundry fan, and rangehood into one visit and save with our bundled pricing.
How Your Home Breathes: The Critical Role of Clean Ventilation.
Your home’s ventilation system quietly controls air quality, humidity, and comfort. When it’s clean, your home breathes effortlessly — circulating fresh air, reducing allergens, and preventing moisture build-up. When it’s dirty, those benefits reverse. MiHT keeps your home’s lungs healthy, season after season.
FAQs
Find answers to common questions about our ventilation system cleaning services.
Our service is a deep clean, not just a quick filter swap. The specifics depend on your system:
Positive Pressure Systems: We conduct a full system overhaul. This includes opening the main unit, vacuuming the fan and housing, replacing or cleaning filters, cleaning all ceiling diffusers, and inspecting the intake and ductwork. We finish by testing airflow and system pressure to ensure it’s working correctly.
Balanced Systems (HRV/ERV): We focus on restoring efficiency. This involves removing and cleaning the heat exchange core, replacing or cleaning both supply and exhaust filters, flushing the condensation drain, and inspecting all ducts and vents. We conclude by testing and balancing the airflow to maximize energy recovery.
Extractor & Exhaust Fans: We target the removal of grease, lint, and mould. This includes degreasing rangehood filters, cleaning fan blades and housings, and vacuuming accessible ducting.
For every job, we provide before-and-after photos and a service report so you can see the results for yourself.
We recommend a professional deep clean every 12 to 24 months.
However, you may need more frequent cleaning if your home has pets, smokers, or allergy sufferers, or if you live in an area with high pollen or construction dust. Regular maintenance is key to ensuring healthy air and preventing costly future repairs.
Yes. A dirty system doesn't just work poorly—it circulates dust, mould, and allergens through your home. Investing in a professional clean is worth it for:
Your Health: Drastically improves indoor air quality.
Your Wallet: A clean, efficient system uses less energy and can lower your power bills.
Your Home: Prevents moisture and mould damage while extending the life of your system.
Your Peace of Mind: Our 100% Clean Satisfaction Guarantee ensures you get real, measurable results.
A clean system is the foundation of a healthy home. The key benefits include:
-Fresher, Cleaner Air by removing pollutants.
-Moisture and mould Control by ensuring proper airflow.
-Improved System Performance and energy savings.
-Quieter and More Reliable Operation.
While homeowners can handle basic tasks like wiping down grilles, a professional service is essential for the parts you can't see or safely access.
Our technicians use specialized tools to deep-clean internal components like fans, heat exchange cores, and ductwork. We also perform technical tests for airflow and pressure that require professional equipment. A DIY clean simply can't match the thoroughness or safety of a professional service.
Still have questions?
Reach out to our team for more information.