Mechanical Heat Recovery Ventilation

Correct Ventilation for a Dry and Healthy Home

New Zealand modern buildings and homes are now, rightly, well insulated and airtight, due to improved building materials, standards and building methods.

Controlling air movement is critical in achieving a dry, healthy, energy efficient, comfortable environment and protecting your internal furnishing integrity.

Method and Benefits

MHRV delivers outside filtered fresh air into your building without creating uncomfortable drafts and mitigates excessive demand on your heating and cooling systems.

  • The health benefits to the occupants cannot be understated.
  • Protects your internal building and furnishing investment.

Modern airtight buildings need to ventilate to remove moisture, CO2 and dirty air more than ever before. For those who have investigated ventilation, understand that MHRV is not only the best option to ensure a clean environment, but also in achieving thermal comfort

The incoming air is filtered before it is introduced into the buildings. MHRV has two airflows (supply & exhaust) that pass one another parallel within the heat-recovery heat exchanger without mixing physically. The heat from "stale" extracted outgoing air is transferred to the "fresh" air introduced from outside.

The overall MHRV process exhausts moisture laden air from wet rooms such as bathrooms, kitchen, laundries and supplies fresh air into all habitable living areas and bedrooms. Thereby replacing the need for independent bathroom and laundry extraction fans.

So Why Use Heat Recovery Ventilation Systems?

  • Introduces 24/7 fresh air without noise pollution and outside dirt & dust.
  • Ensures safe and healthy indoor air quality - low CO2.
  • Exhausts wet areas thereby reducing moisture loads.
  • A dryer home is easier to heat.
  • Removes cleaning chemical toxins and off-gas/VOC.
  • Automatic Summer bypass to keep your home cool.
  • Allows windows to be closed during inclement weather.
  • Protecting temperature loss, wind/drafts, safety, insects and pollen etc.
  • Low energy EC motors provide extremely cost effective operation.
  • Easy installation & maintenance with fully automated or user-friendly controls.

Key Factors That Provide Improved Performance

  • Insulating the ducting to high R values when outside the building envelope.
  • Individual air flow design and on-site commissioning, which includes balancing for centralised units.
  • Air-tightness to the buildings.
  • Installation procedures and detailed quality assurance.

Our Systems

We have spent many years investigating and then introducing the highest quality European MHRV available at more than competitive prices.

Being a commercially independent company we are not restricted to 'single brand choice' so our product selection and variety allows us to cover all size buildings with correct performance design, affordable investment and cost effective operation.

  • Lunos De-Centralised Systems
  • Lunos Ducted Systems
  • Alnor Central Ducted Systems
  • Awenta Central Ducted Systems
  • Lunos Extraction
  • Awenta Extraction

Expertise and Experience

The KPIs to any MHRV is correct design and the knowhow to deliver. Our design team has many years' experience and considerable time and detail is applied to each design. We provide the following services-

No obligation quotations and consultancy available based on receiving building plans.

Due to modern homes now being airtight our heating requirements are minimised. The Heating Company has concentrated on introducing unique modern “Radiant Hidden Heat” heating options that supports MHRV.

Centralised Ducted or De-Centralised Ductless Options

We can divide mechanical ventilation systems with heat recovery into two groups depending on the type of heat recovery unit and solution of air distribution ductwork.


Centralised Ventilation

Alnor, Lunos, Awenta Centralised Ducted Systems are for new builds or existing homes with ceiling voids or floor spaces. Centralised heat recovery systems are used to ventilate the whole building (house) or apartment. Such units are usually connected to a supply and extract ductwork system which distributes fresh air from outside and extracts stale air to the outside, thereby recovering heat within the home.


Decentralised Ventilation

LUNOS De-Centralised Systems offer a range for homes and apartments which have limited roof cavities. The e2 60 and eGO units sit in the external wall and work as a push-pull system with moisture sensors. The NEXXT are individual units for larger spaces. All these products are compact designs, with very low dB levels. The SILVENTO extraction fans have intelligent controls, like humidity or CO2 sensors.

For complete software flow design with marked-up floor plans including supply and install costings, or just simple advice, please do not hesitate in contacting us at THE HEATING COMPANY.

What People Say About Us

left quote

The art to getting a warm room in the morning with the unit is to give the heater at least an hour before using the shower - this works! We reset the controller to start 30 minutes earlier than before and we find the room is now nicely warmed when needed in the morning.

Martin & Denise Coles
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