Fresh filter. Full airflow. Dry windows again.
Reply within one working day, often the same morning.
Somewhere in your roof is a machine you bought to fix the damp – and most likely, nobody has touched it since installation day. It still hums. The little light still glows. But its filter clogged years ago, so it’s pushing a fraction of the air it should through a mat of dust, and the condensation it was meant to stop is quietly creeping back onto the windows. The system didn’t fail. The filter just finished, and nobody was told.
We service and replace filters for every main ventilation system in New Zealand – HRV, DVS, SmartVent, Moisture Master and more – regardless of who sold or installed it. We install SmartVent systems ourselves, so we know these machines from the roof down, and as the heat pump arm of trusted local trade team Budget Electrical, our registered electricians treat that wired appliance in your ceiling with the respect it’s due.
A positive-pressure system has one job: push clean, drier air into your home, continuously. The filter is the only thing standing between your hallway ceiling diffuser and everything floating around your roof space - and when it clogs, the system works harder to deliver less, and what it delivers isn't clean. A fresh, correct-grade filter isn't maintenance trivia. It is the system.
No musty hallway. No streaming windows. No filter three years past its date.
Ventilation filters are designed to be replaced every 12 months – up to 24 on some systems – and almost nobody remembers, because the unit is in the roof and out of mind. Every year past its date, the filter traps more of the dust, pollen and roof-space debris it was built to catch, until the fan is straining to push air through what is effectively a felt blanket.
You’ll feel it before you see it: the musty smell comes back, winter mornings put condensation back on the glass, the airflow at the ceiling diffusers fades to a whisper, spring allergies get worse instead of better, and the filter warning light has been glowing so long it’s become furniture. None of that means your system is broken – it usually means the filter is simply finished.
We fit the correct replacement filter for your exact model – including the F7 and F8 fine-particle grades that catch dust and pollen properly – for HRV, DVS, SmartVent, Moisture Master and the other main systems. While we’re up there we clean the diffusers, confirm the airflow has actually come back, and reset the filter warning light so it’s tracking honestly again. The roof space is our office; you don’t climb anywhere.
A single-filter system service costs $[confirm] including GST; larger homes often run dual-filter systems, from $[confirm] – we’ll tell you which yours is when you book. And because the whole problem with ventilation filters is remembering, we record the date and remind you when the next one’s due.
Roof spaces are hard on machines. Fan bearings wear and get noisy, ducting gets kinked, crushed or pulled apart – quietly venting your warm filtered air into the roof instead of the bedrooms – condensation pools in low duct runs, temperature sensors drift, and controllers end up on the wrong seasonal settings for years. A full service covers all of it: fan and motor checked, every duct run inspected and re-seated, sensors tested against real temperatures, controller set up properly for the season, and minor repairs done on the spot.
Book the full service rather than just a filter when the symptoms outlast a fresh filter: the system has become louder than it used to be, airflow stays weak, the controller shows errors, or the house stays damp while the unit hums away happily. Those are fan, duct or sensor problems – and they get diagnosed properly, not guessed at.
One more thing most people forget: that unit in the ceiling is a wired appliance. Our technicians are AC-qualified and our electricians are registered, so the electrical connections get checked by someone actually qualified to check them – one visit, both trades, from the Budget Electrical family.
Here’s the honest hierarchy. Most neglected systems revive completely with a new filter, a fan clean and a duct check – that’s the happy majority, and it’s the cheap outcome. A smaller group needs a real repair: a failed fan motor, a dead controller, a duct run that needs replacing. And a system from the 2000s with obsolete parts sometimes isn’t worth another dollar – in which case we tell you that before you spend one.
Then there’s the house that has simply outgrown its system – extensions added, family grown, or a unit that was undersized on day one, still damp with everything technically working. That’s when it’s worth looking at a modern SmartVent home ventilation system with proper sensors and dew-point control. That’s our installation page; this page is about keeping what you already own alive as long as it deserves to be.
The easy win either way: bundle it. We’re servicing heat pumps across the region every week, so the ventilation filter and the heat pump can share one visit and one callout – and landlords get dated service records for the Healthy Homes file, with a reminder when the next filter’s due so this never gets forgotten again.
Most ventilation systems get touched exactly once – on installation day. After that they run unwatched for a decade, breathing through the same filter, while the brand that sold them would rather sell you a new system than service the old one. Here’s our answer to that.
HRV, DVS, SmartVent, Moisture Master – we service what’s already in your roof, whoever sold it. We’re not here to talk you out of a working system and into a new one; replacement only ever comes up when the honest maths says so.
A ventilation unit is a wired appliance in your ceiling: airflow on one side, electricity on the other. Our AC-qualified technicians and registered electricians check both in the same visit – fan, ducts, sensors and the connections behind them.
Every service ends with a dated record of the filter fitted and everything checked – tidy for landlords’ Healthy Homes files – and we remind you when the next filter is due. The whole failure mode of ventilation systems is forgetting; we make forgetting impossible.
Every 12 months is the honest rule for most systems – some models stretch to 24 months depending on the filter grade and how dusty the roof space is. In practice, most filters in Manawatū ceilings are years overdue, because the unit is out of sight and the reminder system is a small light everyone ignores. If you can’t remember when yours was last changed, that is the answer – and when we replace it, we record the date and remind you when the next one’s due.
A single-filter system service is $[confirm] including GST, and dual-filter systems (common in larger homes) from $[confirm] – we’ll confirm which yours is when you book. That covers the correct-grade filter, fitting, diffuser clean, airflow check and resetting the filter light. If the technician finds anything beyond the filter – a tired fan, damaged ducting – you get a price before any extra work happens.
All of them. HRV and DVS are brand names that have become shorthand for home ventilation, and we service every main system sold in New Zealand – HRV, DVS, SmartVent, Moisture Master and others – including systems whose original installer is long gone. We’re independent, so the advice is about your system, not about switching you to ours.
The musty smell returns, condensation starts reappearing on winter windows, the airflow at the ceiling diffusers feels weak or nonexistent, the system sounds like it’s working harder than it used to, spring allergies get worse instead of better, and the filter warning light has been on so long you’ve stopped seeing it. Any one of those is reason enough to book; two or more means the filter finished a while ago.
Start with the filter – an overdue filter throttles the airflow that does all the work, and it’s the cause more often than everything else combined. If a fresh filter doesn’t fix it, the usual suspects are ducting that’s come apart or kinked in the roof (the system ventilates your roof cavity instead of your rooms), drifted sensors, or wrong controller settings. And occasionally the system was simply too small for the house – at which point it’s a home ventilation conversation, not a servicing one. We diagnose which it is before anyone spends real money.
If you’re comfortable in your roof space and can source the correct-grade filter for your exact model, yes – it’s not forbidden knowledge. What the DIY route misses is everything around the filter: the fan condition, duct runs that may have come apart, sensor accuracy, controller settings and the electrical connections – plus knowing the filter is genuinely the right grade rather than “one that fits”. Most people decide crawling through ceiling insulation is worth $[confirm] to skip. Either way, put a date on it.
Service it first – most “dead” systems come back to life with a filter and a clean, and that’s the cheap outcome. Repair makes sense while parts are available and the fan and ducting are sound. Replacement earns its keep when parts are obsolete, the system was undersized from day one, or the house has grown past it – and if that’s the honest answer, we’ll show you the modern SmartVent options with real numbers rather than keep billing you to prop up a relic.
Across the whole region – Palmerston North, Feilding, Ashhurst, Levin, Marton, Bulls, Foxton, Shannon, Woodville, Pahiatua and the surrounding Manawatū, Horowhenua, Rangitīkei and Tararua districts. Same filters, same pricing, same team – often on the same visit as a heat pump service.