Ventilation Experts in Whangārei

Lossnay Ventilation
Systems Whangārei

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Lossnay Ventilation Systems Whangārei

Northland's damp climate is hard on buildings and the people inside them. Condensation, mould, and stale air are common - and standard ventilation solutions don't always cut it. Lossnay heat recovery ventilation brings in fresh, filtered outdoor air continuously while retaining the energy already in your home, making it one of the most effective ventilation options available for our climate.

At Positive Electrical, we supply and install Lossnay systems for homes and businesses across Whangārei and Northland - new builds, renovations, retrofits, and commercial fit-outs.

Get a free, no-obligation estimate today.

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09 438 8832

We’re available 24/7, 365 days a year.

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 Trustindex verifies that the original source of the review is Google. We have used Positive Electrical & Solar to work on faults in an old house that we bought. Being an older home, this presented many challenges but the team were thorough & knowledgeable, keeping us up to date the whole time. We are very pleased with the workmanship, and that they could fix all of the problems. I would highly recommend the team at Positive to anyone & will be using them again in the future.
  
 
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About the Lossnay system

Lossnay is Mitsubishi Electric’s heat recovery ventilation system. Most ventilation systems work by simply pushing air in or pulling air out – which means any heat already in your home goes with it. Lossnay works differently.

Inside every Lossnay unit is a heat exchanger core. Warm stale air leaving your home and cool fresh air coming in pass through this core at the same time. As they do, the heat from the outgoing air transfers across to the incoming air, warming it up before it enters your home. The two airstreams never mix – you get fresh outdoor air, pre-warmed by the heat you’ve already paid for. In summer the process works in reverse, with the cooler indoor air taking the edge off incoming warm outdoor air before it enters.

Depending on the model, Lossnay recovers between 86% and 93% of the heat energy from outgoing air – making it one of the most energy-efficient ventilation systems available in New Zealand.

Key features

Heat and moisture recovery

Recovers 86–93% of heat energy from outgoing air depending on model and fan speed.

Continuous fresh air supply

Removes CO2, odours, and pollutants while bringing in filtered outdoor air.

Quiet operation

As low as 14dBA, suitable for bedrooms, offices, and living areas.

Residential and commercial configurations

From single-room wall-mounted units to whole-building ducted systems.

Supports Healthy Homes compliance

Relevant for rental properties across Northland.

Wi-Fi control available

Monitor real-time heat recovery rates and receive filter maintenance reminders via app.

Getting your Lossnay system installed

Whether you’re at the design stage of a new build, mid-renovation, or looking to improve an existing property, we tailor our approach to your situation. Here’s how it works:

Free assessment

We assess your property – or work with your plans if you’re in the design or build phase – looking at layout, insulation, moisture levels, and ventilation needs to recommend the right Lossnay configuration.

Recommendation and quote

You get a clear, detailed quote for the most suitable system. No hidden costs, just straight advice on what will work for your space and budget.

Professional installation

Our qualified team installs your Lossnay system to manufacturer and industry standards, handling all ducting, unit placement, and electrical connection in one visit.

Handover and support

We walk you through the system, tidy up, and stay available for servicing or questions down the track.

Comparing ventilation systems for Northland properties

Different ventilation systems suit different properties and budgets. Here’s a straightforward comparison to help you understand the options:

System	How it works	Best for	Northland suitability	Consideration
Lossnay (Heat Recovery Ventilation)	Exchanges stale indoor air with fresh outdoor air, recovering 86–93% of heat energy through a heat exchanger core. Filters allergens and pollutants.	New builds, renovations, commercial buildings, rentals, allergy sufferers	Well suited – does not rely on roof cavity conditions, handles humidity effectively	Higher upfront cost than some alternatives; more complex to retrofit into finished homes
Positive pressure (HRV, DVS)	Draws air from the roof cavity and pushes it through the home to displace moist air	Existing homes with accessible roof cavities in drier inland areas	Variable – roof cavity air quality affects performance; less predictable in coastal or high-humidity areas	Performance depends on roof cavity conditions, which vary across Northland
Extract-only ventilation	Extracts moist air from wet rooms such as bathrooms and kitchens	Spot ventilation in wet rooms as a supplement to a whole-home system	Useful as part of a broader ventilation strategy	Does not supply fresh air to the rest of the home
Natural ventilation	Relies on open windows and passive airflow	Mild climates, properties where occupants actively manage airflow	Limited during Northland winters when homes are closed up	Inconsistent – depends on occupant behaviour and outdoor conditions
Passive stack ventilation	Uses temperature and pressure differences to move air without mechanical assistance	Heritage buildings, low-energy projects	Unreliable in Northland’s mild, humid climate	Difficult to control; airflow rates can be unpredictable

What does a Lossnay system cost?

There’s no single price, because no two installations are the same. The key factors that affect cost include:

Property size and layout. Larger or more complex floor plans require more ducting and potentially multiple units.
New build, renovation, or retrofit. Systems planned during the design or build phase are generally more cost-effective to install than retrofits into finished spaces.
Residential or commercial. Commercial configurations are larger and more involved, and priced accordingly.
Access and ceiling space. Good roof or ceiling access makes installation quicker and more straightforward.
Electrical work. All Lossnay installations require connection by a registered electrician - we handle this as part of the job.

Why Whangārei chooses Positive Electrical for Lossnay installation

Lossnay ventilation across Whangārei and Northland

We install Lossnay systems for homes and businesses throughout Whangārei and the surrounding Northland region, including Kamo, Onerahi, Ruakākā, Waipū, Mangawhai, Dargaville, and surrounding areas.

Frequently Asked Questions

What is Lossnay and how is it different from HRV or DVS?

Lossnay is Mitsubishi Electric’s heat recovery ventilation system. Unlike positive pressure systems such as HRV or DVS, which push air from the roof cavity into the home, Lossnay continuously exchanges indoor and outdoor air through a heat exchanger core – recovering 86–93% of the heat energy in the process depending on the model. The two technologies work differently and suit different properties and budgets.

Is Lossnay suitable for existing homes or only new builds?

Lossnay can be installed in new builds, renovations, and existing properties. Working at the design or build stage gives more flexibility with ducting placement, but our team has experience retrofitting systems into finished homes with minimal disruption.

Will a Lossnay system help with mould and condensation?

Lossnay reduces indoor moisture by continuously replacing stale, humid air with fresh filtered outdoor air. Combined with adequate heating and insulation, it can significantly reduce condensation and mould – a particular consideration in Northland’s damp coastal climate.

Can Lossnay help meet Healthy Homes ventilation requirements for rental properties?

A Lossnay system can form part of a compliant ventilation solution under the Healthy Homes Standards. Get in touch and we can advise on what’s required for your specific property.

Does Lossnay work alongside a heat pump?

Yes – the two systems complement each other well. A heat pump manages temperature; Lossnay keeps the air fresh without losing the energy the heat pump has put into it. Because incoming air is pre-warmed by the Lossnay core, your heat pump also has to work less hard to reach the desired temperature.

How much energy does a Lossnay system use?

Lossnay systems use low-wattage fans and recover the majority of heat from outgoing air, keeping running costs low. Contact us for specifics based on the model suited to your property.

Is Lossnay suitable for commercial buildings?

Yes, Mitsubishi Electric offers commercial Lossnay configurations for offices, retail, hospitality, schools, medical facilities, and other commercial premises. We design and install systems tailored to the building’s size and requirements.

How often does a Lossnay system need servicing?

We recommend an annual service for residential systems. The core element should be checked and cleaned regularly to maintain performance and air quality. Commercial systems may require more frequent attention depending on usage.

How long does installation take?

Most residential installations can be completed within one to two days depending on the complexity of the ducting. We’ll confirm the timeframe as part of your free quote.

Do I need a separate electrician?

No – as a registered electrical contractor, Positive Electrical handles all electrical work as part of the installation.

Book your Lossnay installation in Whangārei today

Dealing with mould, condensation, or poor air quality in your home or workplace? Positive Electrical installs Lossnay heat recovery ventilation systems for homes and businesses across Whangārei and Northland - from new builds and renovations through to commercial fit-outs and retrofits.

You'll get a free assessment, a clear quote with no hidden costs, and installation by our qualified local team who handle ducting and electrical connection in one job. And once it's in, we're here for servicing and support whenever you need us.

Get a free estimate online, or call us on 09 438 8832 to talk it through.

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