Ventilation & Heating
September 24, 2026

HRV vs DVS vs SmartVent: which home ventilation system is best in NZ?

By Jordan Statham, Director and Registered Electrical Inspector at The Conduction Company. EWRB registration I272615.

An installer sliding a filter into a home ventilation unit in a roof space

Blog Categories

EV, Hot Water & Home Systems
Inspection, Testing & Certification
Costs, Quotes & Choosing an Electrician
Ventilation & Heating
Data, TV & Networking
Switchboards, Wiring & Safety

Not sure which ventilation system suits your home?

The Conduction Company will assess the house and recommend the right system, whether that is SmartVent, DVS, or something else entirely.

Book an assessment

If you are comparing HRV, DVS, and SmartVent, here is the short version: all three are proven home ventilation systems in New Zealand, and the best one is the one that suits your home's layout, your moisture problem, and your budget, not the one with the biggest ad spend.

We are The Conduction Company, an Auckland electrical contractor based in Onehunga. We install and service ventilation systems across Auckland, so this comparison comes from fitting these units in real homes, not from a brochure. Here is how the three stack up, in plain terms.

The main difference between HRV, DVS, and SmartVent

The main difference between HRV, DVS, and SmartVent is how they move air. HRV and DVS are best known for positive pressure systems, which draw filtered air from the roof space and push it into the home to reduce condensation. SmartVent offers both positive pressure and balanced pressure (heat recovery) systems, where a balanced system extracts stale air and recovers heat from it. The Conduction Company installs SmartVent, and its staff have installed and repaired HRV, DVS, SmartVent, and many other ventilation products in previous roles. For most Auckland homes the right choice comes down to whether you mainly need to fix condensation or you want year-round filtered fresh air with heat recovery.

HRV vs DVS vs SmartVent vs Better Vent, side by side

The estimates below are for standard installation of a home ventilation system. The Conduction Company confirms final pricing after a property assessment.

The Conduction Company's comparison of HRV Classic, DVS EC Automatic Plus, SmartVent, and the Better Vent standard 4-outlet system.

System type. HRV Classic is best known for positive pressure. DVS EC Automatic Plus is positive pressure. SmartVent does positive pressure and balanced pressure, meaning heat recovery. Better Vent is positive pressure.

Air source. HRV Classic and DVS both draw roof cavity air. SmartVent draws roof cavity air on the positive pressure range, and its balanced systems bring in filtered outside air and extract stale air. Better Vent draws roof cavity air, the same class of system as the other three.

Filter and change interval. HRV Classic uses a nanofibre "HRV Classic Filter". HRV publishes no filter grade, and claims filtration down to 0.4 microns. It is changed every 2 years, and HRV states filter changes are required to maintain the warranty. DVS uses an "EcoStatic" New Zealand wool filter. DVS publishes no filter grade and no numeric filtration claim, and strongly recommends annual replacement. SmartVent uses an F7, changed every 6 to 12 months. Better Vent uses an F8, changed every 2 years, with the filter about $55 including GST.

Controller. HRV Classic has a touchscreen controller. DVS has a simple controller, with limited smart home integration. SmartVent has a controller with app connectivity, sensors and settings that can be split by room. Better Vent has none, just an on and off wall switch.

Sensing. HRV Classic senses temperature only, using two temperature sensors, in the wall controller and the roof space. DVS depends on the model: the EC Automatic Plus senses temperature only, and the EC Climate Controlled, higher up the same range, adds humidity. SmartVent senses temperature and humidity. Better Vent senses temperature only, driving summer and winter modes.

Warranty. HRV Classic is 60 months from installation, conditional on filter changes every two years by authorised HRV personnel using genuine HRV filters, at the client's expense. DVS is 5 years on site parts and labour from the day of installation, and DVS states a non-genuine filter may void it. SmartVent is 5 years, conditional on genuine parts. Better Vent is 6 years, valid even on third-party filters.

Indicative installed price, including GST. The Conduction Company does not install HRV, so we publish no installed price. Clients, and staff who fitted HRV in previous roles, report it above SmartVent and DVS. DVS is priced by DVS directly, and The Conduction Company publishes no DVS installed price. SmartVent is $2,500 to $5,500 for positive pressure, and $6,500 to $10,200 for balanced heat recovery, which is The Conduction Company's own Auckland installed pricing. Better Vent is $2,600 for a 3-bedroom, 4-outlet single-storey home, which is Better Vent's own published price, not a Conduction Company estimate.

Who installs it. HRV uses its own sales and service team. DVS is installed by DVS and independent electricians, and DVS sells and prices its own systems. SmartVent uses a national network of accredited installers, and The Conduction Company is a SmartVent accredited installer. Better Vent installs its own system.

Best suited to. HRV Classic suits homeowners who want the biggest brand name and an in-house call centre. DVS suits older or traditional Auckland homes that want a simple, affordable fix for condensation. SmartVent suits homes that want quiet ducting, room-by-room control, an upgrade path, or balanced heat recovery. Better Vent suits a single-storey home wanting a basic 4-outlet positive pressure system at a fixed published price, with an on and off switch.

How The Conduction Company built this table: the HRV, DVS, SmartVent, and Better Vent specifications all come from each manufacturer's own published documents, and the tiers compared are the HRV Classic, the DVS EC Automatic Plus, the SmartVent positive pressure system we quote most often, and the Better Vent standard four-outlet system. The SmartVent price is The Conduction Company's own Auckland installed pricing including GST. DVS prices its own systems, and the Better Vent price is Better Vent's own published figure. Only SmartVent and Better Vent publish a filter grade at all, so a grade cannot be compared across all four systems, and we state what each manufacturer publishes rather than fill the gap with a number nobody has published. One thing worth knowing before you choose on filter grade alone: a finer filter resists airflow harder, and it is air volume that dries a house out, so a finer filter trades away the thing that fixes dampness. For the full pricing breakdown, read our guide to home ventilation system costs in NZ.

HRV

Probably New Zealand’s most recognised brand, thanks to aggressive marketing.

Pros:

  • Strong brand recognition among homeowners.
  • Good after-sales service with a call centre and dedicated service technicians.
  • Simple-to-use touchscreen controllers.
  • Bundle options (air conditioning, water filtration, insulation).

Cons:

  • Expensive. Staff at The Conduction Company have installed HRV in previous roles, and found it priced higher than SmartVent and DVS.
  • High repair costs. Clients tell The Conduction Company that HRV parts and repairs come in disproportionately expensive.
  • Lower component quality. Ducting and some smart tech features are weaker.
  • Sales pressure. Clients tell us about heavy upselling and frequent follow-up calls.

What are the disadvantages of an HRV system?

The disadvantages clients report to The Conduction Company are price, repair costs, and sales pressure. Staff who fitted HRV in previous roles found it dearer than SmartVent and DVS. Clients also tell us that parts and repairs cost more than expected, and that the follow-up calls do not stop.

HRV relies heavily on sales reps (who can sometimes push upsells you may not actually need). The main complaint we hear regarding HRV is that they will not stop calling.

Summary:

Good brand awareness but costly. The clients who come to The Conduction Company tell us the negatives, mainly expense and heavy sales pressure, outweigh the positives.

Take a good look at the HRV reviews online before committing, especially if you’re comparing Smart Vent vs HRV for performance and price.

The Conduction Company does not install HRV, so we publish no installed price for it. Clients who have priced HRV, and staff who fitted it in previous roles, consistently report it above SmartVent and DVS.

‍

DVS

The "original" positive pressure system in New Zealand. Staff at The Conduction Company have installed and repaired DVS in previous roles, so the pros and cons below come from units they have worked on.

Pros:

  • NZ-owned brand (always nice supporting local).
  • Reliable and simple, well-suited for older homes.
  • Affordable pricing.
  • Not a ‘pushy’ sales approach like HRV.

Cons:

  • Limited smart home integration.
  • Less modular if you want to upgrade later.
  • Noisy air outlets on basic models.
  • Basic air filters which cannot be easily upgraded.
  • After-sales support can vary.

Is a DVS system worth it for my home?

For an older Auckland home with a condensation problem, The Conduction Company rates DVS good value. It is simple, reliable, and affordable. Staff at The Conduction Company have installed and repaired DVS in previous roles, which is where that view comes from. It is worth less if you want app control, room-by-room settings, or an easy upgrade path later.

Summary:

If the choice was only between HRV and DVS, The Conduction Company would pick DVS every time. When homeowners ask us is DVS or HRV better, DVS often wins on affordability and a simpler setup.

Their approach isn’t the most modern or tech-forward, but if you’re comparing the difference between HRV and DVS, DVS tends to perform better for older or traditional homes.

DVS prices and sells its own systems, so The Conduction Company publishes no installed price for DVS. Running cost is about $15 to $30 a month including GST, in line with any positive pressure system of this type.

‍

SmartVent

A modern, flexible, NZ-owned brand focused on modular systems and smart tech.

Pros:

  • Highly modular (easy to upgrade to add heating, CO₂ monitoring, summer kits, etc).
  • Offers both positive pressure and balanced pressure systems.
  • Energy-efficient EC fans.
  • Smart controls and smartphone app connectivity.
  • Acoustic insulated ducting (specific to SmartVent) = super quiet operation.
  • Sensors and controllers are independent and customisable by room.

Cons:

  • Wireless sensor technology (new) has had minor teething issues, but SmartVent is refining it.
  • SmartVent works through a network of independent electricians and contractors, meaning installation quality can vary.

They have a different business model compared to HRV and DVS. They rely heavily on the installers to sell, install, and maintain systems.

One of the huge benefits to this model is low sales pressure.

If an installer believes that a ventilation system might not be the correct solution to your problem, they can offer alternatives. (Unlike DVS or HRV who are only interested in selling you an HRV or DVS.)

Ensuring that you select a SmartVent installer that is knowledgeable, accredited, and has excellent reviews, is a must.

If you are planning a SmartVent home ventilation installation in Auckland, choosing a trusted professional is essential.

Learn more about our approach to SmartVent installations and why Auckland homeowners trust The Conduction Company to get it right the first time.

SmartVent offers the best performance when combined with ventilation installation across Auckland that improves airflow and reduces indoor moisture buildup.

Summary:

Hands down, the best system, IF you choose the right installer. That is our view at The Conduction Company, based on the systems The Conduction Company installs across Auckland and its staff's experience with HRV and DVS in previous roles.

Fantastic performance, flexibility, and value for money. SmartVent easily outpaces HRV and DVS in modern ventilation solutions. Many Smart Vent reviews also highlight its quiet operation and modular design, making it one of the top-rated systems among local homeowners.

The estimates below are for standard installation of a home ventilation system. The Conduction Company confirms final pricing after a property assessment.

A SmartVent positive pressure system typically lands between $2,500 and $5,500 including GST installed, and a balanced pressure heat recovery system between $6,500 and $10,200, which is The Conduction Company's own Auckland installed pricing.

Which should I pick?

For a typical Auckland home with a damp, condensation problem, The Conduction Company usually finds a positive pressure system from DVS, HRV, or SmartVent is enough. If you want fresh filtered air all year and better retained warmth, we recommend a balanced pressure (heat recovery) system as the stronger long-term solution. We assess each home before recommending a system, because roof space, insulation, and how you use the home all change the answer.

If you are weighing up a balanced pressure or heat recovery setup, talk to us about the right system for your home.

Is positive or balanced pressure better?

Neither is better outright. The Conduction Company recommends positive pressure for most Auckland homes with a condensation problem, because it is simpler, cheaper, and it dries the house out. We recommend balanced pressure heat recovery for newer, tighter homes that want filtered fresh air and retained warmth all year.

What About Other Brands?

Be cautious, but be specific.

Small ventilation brands come and go, and when one disappears the client is left with a system nobody supports and no parts on the shelf. That is the real risk with an unfamiliar brand. Ask any installer how long the manufacturer has been in the New Zealand market, who stocks the parts, and who services the unit if the installer moves on.

SmartVent, DVS, and HRV all clear that bar. They have long track records, ongoing product development, product support, and replacement parts readily available.

One other brand comes up often enough in Auckland that it deserves a straight answer rather than a blanket warning.

What about Better Vent?

Better Vent is a positive pressure system that draws air from the roof cavity, the same class of system as SmartVent, DVS, and HRV positive pressure units. The Conduction Company does not install Better Vent, and clients do ask us to compare it, so here is what the two systems do on paper.

Better Vent publishes a price of $2,600 including GST installed for a three-bedroom, single-storey home with four outlets, running on a single EC motor. It uses an F8 filter on a two-year change interval, and the filter is about $55 including GST. There is no controller. It runs from an on and off wall switch, with summer and winter modes that switch on temperature. The warranty is six years, and Better Vent designs, sells, installs, and warrants the system itself, so one company holds the whole chain.

The SmartVent positive pressure system The Conduction Company quotes most often is also roof-cavity air. It uses an F7 filter on a six to twelve month change, it has a controller, and it senses both temperature and humidity. The warranty is five years. Behind it sits Simx, which stocks parts nationally and runs an accredited installer network, and The Conduction Company is one of those accredited installers.

Two things are worth knowing before you pick on filter grade alone. A finer filter does nothing for condensation, because air volume is what dries a house out, and a finer filter resists airflow harder. And every filter gets more efficient as it loads and more restrictive at the same time, so airflow falls the whole while. A filter grade describes day one, not month eighteen. The grading method has also moved on. EN 779 was withdrawn in 2018 and replaced by ISO 16890, and the same filter usually reports a lower figure under the newer method.

The thing The Conduction Company would check before you buy is humidity sensing, because it separates the tiers rather than the brands. Most entry level positive pressure systems sense temperature only, and on their published specifications that includes the HRV Classic, the DVS EC Automatic Plus, and Better Vent. DVS publishes a humidity sensing model higher up the same range, the EC Climate Controlled, and the SmartVent positive pressure system we quote senses both temperature and humidity. So ask any installer which sensors the exact model carries, because a system that reads humidity can tell how damp the house actually is, and one that reads temperature alone is working off the weather.

Is The Conduction Company Biased Towards SmartVent?

Honestly? Probably a little.

The Conduction Company is an accredited SmartVent installer, and we are upfront about that. Our staff have installed and repaired HRV, DVS, SmartVent, and many other ventilation products in previous roles, so the comparison here comes from hands-on experience with all of them, not from a brochure. We will tell you when another brand is the better fit for your home. We are an Auckland electrical contractor, not a single-brand reseller, so our job is the right system for the house, not the biggest sale.

Our staff have installed and repaired all the major systems, including HRV, DVS, SmartVent, and many other ventilation products, in previous roles.
We chose SmartVent because it's simply the best product for the price, otherwise we wouldn’t install it.

How much does a home ventilation system cost?

The estimates below are for standard installation of a home ventilation system. The Conduction Company confirms final pricing after a property assessment.

The Conduction Company installs home ventilation systems across Auckland, and a fully automatic positive pressure system generally costs between $2,500 and $5,500 including GST, installed. Basic, manually controlled systems start from as low as $1,500 including GST. The final price depends on the size and layout of your home, the system you choose, and the work needed to install it. We confirm a fixed price after assessing your property, so you know the full cost before any work starts.

Manual and automatic systems are two different things

A manual system is simply a fan with a high and a low setting. There is no controller making decisions for you, so you choose the speed yourself based on how much moisture you are seeing in the home. That is why manual systems are the cheapest option, starting from around $1,500 including GST, installed. HRV, DVS and SmartVent are all automatic systems, where a controller reads conditions and sets the fan speed for you. The Conduction Company fits manual systems where a fully automatic system is outside the budget.

The Conduction Company keeps the full pricing picture in one place. For what a replacement costs when the existing ducting can be reused, what pushes a large or complex home higher, and what the system costs to run and refilter, read our guide to home ventilation system costs in NZ.

How much does it cost to run a DVS ventilation system per day?

About 50 cents to $1 a day. The Conduction Company puts the running cost of a positive pressure ventilation system at roughly $15 to $30 a month including GST, based on the systems it installs across Auckland. A DVS unit sits in the same fan class, so it runs at a similar cost. That is 50 cents to $1 a day. The fan is the only real power draw.

We quote on facts, not guesses

Before we give you a price, we carry out a proper assessment of your property and how you'll use a home ventilation system. That way you know exactly what you're buying and the total cost, with no surprises. Clear expectations from the outset, start to finish.

Final Verdict

The Conduction Company rates SmartVent the clear winner for most Kiwi homeowners among home ventilation systems:

  • Best performance
  • Best smart tech integration
  • Best upgrade path
  • Best value for money

In the DVS vs HRV pros and cons comparison, we rate DVS the better budget choice, and SmartVent the clear all-round performer.

Choosing the right system for your home can be tricky. We handle ventilation installation across Auckland, so speak to an expert to make sure you get the best fit for your needs.

Frequently asked questions

What is the difference between HRV, DVS, and SmartVent?

HRV and DVS are best known for positive pressure ventilation, which pushes filtered air from the roof space into the home to cut condensation. SmartVent offers both positive pressure and balanced pressure (heat recovery) systems. All three are widely installed in New Zealand homes. The Conduction Company installs SmartVent. Its staff have installed and repaired HRV and DVS in previous roles.

Which home ventilation system is best for a damp house in Auckland?

For a home with condensation and moisture, a positive pressure system (DVS, HRV, or SmartVent) is usually enough to dry the air out. If you also want filtered fresh air all year and better heat retention, a balanced pressure heat recovery system is the stronger choice. The Conduction Company assesses your home first, because the right answer depends on your roof space and layout.

Is positive pressure or balanced pressure ventilation better?

Positive pressure ventilation is simpler and effective at reducing condensation. Balanced pressure (heat recovery) ventilation costs more but extracts stale air, brings in filtered fresh air, and recovers heat, so it suits homes that want year-round air quality and warmth. The best fit depends on the home, which is why we assess before we recommend.

Can The Conduction Company install any ventilation brand?

We are not beholden to any one brand in particular, and can install most brands across the range of ventilation systems available on the market. Having installed hundreds of systems across Auckland over the years, The Conduction Company has developed brand preferences based on the results we have seen for different system types. During the site assessment we'll let you know the pros and cons of each different brand, so that you'll have all the information you need to make the best brand choice for your property and budget.

How much does a home ventilation system cost in Auckland?

The Conduction Company installs home ventilation systems across Auckland, and a fully automatic positive pressure system generally costs between $2,500 and $5,500 including GST, installed. Basic, manually controlled systems start from as low as $1,500 including GST. The exact price depends on the size and layout of your home and the system you choose. We confirm a fixed price after assessing your property. This is an estimate, not a quote. Final pricing is confirmed after a property assessment.

Does installing a home ventilation system need an electrician?

A ventilation system is wired into your home's electrical supply, so the electrical connection is prescribed electrical work in New Zealand and should be done by a registered electrician, who issues the required certification once it is complete. The Conduction Company is a registered Auckland electrical contractor, so the install and the wiring are handled by one team.

What are the disadvantages of an HRV system?

Clients tell The Conduction Company that the main disadvantages of HRV are cost, expensive parts and repairs, and persistent sales calls. Staff who installed HRV in previous roles found it priced above SmartVent and DVS. Compare quotes and read the HRV reviews before you commit.

Is a DVS system worth it for my home?

For an older Auckland home with condensation, The Conduction Company rates DVS worth it. It is simple, reliable, and affordable. Staff at The Conduction Company have installed and repaired DVS in previous roles, which is where that view comes from. It is worth less if you want app control, room-by-room settings, or an easy upgrade path later on.

How much does it cost to run a DVS ventilation system per day?

About 50 cents to $1 a day. The Conduction Company puts the running cost of a positive pressure ventilation system at roughly $15 to $30 a month including GST, based on the systems it installs across Auckland. A DVS unit sits in the same fan class, so it runs at a similar cost. The fan is the only real power draw. Filters cost around $100 including GST, roughly once a year.

What does a DVS system do?

A DVS system is a positive pressure ventilation system. It draws air from the roof space, filters it, and pushes it into the home, so damp indoor air is replaced and condensation drops. Staff at The Conduction Company have installed and repaired DVS in previous roles, mostly in older homes with a moisture problem.

What is a balanced pressure ventilation system?

A balanced pressure system, also called heat recovery, extracts stale air from the home and brings in filtered fresh air, recovering heat from the air on its way out. The Conduction Company installs balanced SmartVent systems across Auckland, and they suit newer, tighter homes that want fresh air and retained warmth all year.

Are home ventilation systems worth it?

For a damp Auckland home, yes. The Conduction Company fits ventilation systems that cut condensation on windows, reduce mould, and make a house easier to heat, for about $15 to $30 a month including GST to run. They are worth less in a dry, well insulated home that already has good extraction.

What is the difference between a manual and an automatic ventilation system?

A manual system is simply a fan with a high and a low setting, and you choose the speed based on how much moisture you are seeing in the home. HRV, DVS, and SmartVent are automatic systems, where a controller reads conditions and sets the fan speed for you. Manual systems are the cheapest option, starting from around $1,500 including GST, installed, and The Conduction Company fits them where a fully automatic system is outside the budget.

Related Posts

Check out some blog posts under the same category

An electrician fitting a white dome security camera into a ceiling.
September 17, 2026

Is It Better to Have Wired or Wireless Security Cameras?

Checking an electrician's registration on the EWRB public register from a phone
September 16, 2026

How Do You Check an Electrician Is Registered in NZ?