What Is A Ventilation System?

A ventilation system enables a constant supply of air into a home. Its job is to draw in and filter a constant supply of fresh air from outside the home, while exhausting stale/damp air back out. With a high-quality ventilation system, you can expect 3–4 air changes per hour and fresh, filtered air 24/7.

How Does A Ventilation System Work?

A ventilation system works by mechanically forcing out the old, stale, dusty air and replacing it with fresh, new air. This can either be done by exhausting air (negative pressure systems) or supplying air (positive pressure systems) to a room or building.

HRV Ventilation System

What Are The Different Types of Ventilation Systems?

  • Whole Home Ventilation Systems

These units are installed in your roof space and change the air in your home to expel excess moisture, toxins and odours. Incoming air is filtered to remove dusts, pollens and other contaminants, for a fresher and healthier home. Incoming air is warm and dry in winter and cool and dry in summer, which prevents mould, mildew and window condensation all year round.

  • Sub Floor Ventilation Systems

Sub floor ventilation can remove ground moisture from underneath raised floors, creating a drier and warmer sub floor area. Pest and building inspectors recommend sub floor ventilation to reduce termite risk.

  • Heat Transfer Systems

Rooms that get more sun or have a heat source are generally warmer than those without. A heat transfer system can ensure other rooms in your home are as warm and cosy as your sunlit lounge. Heat transfer systems balance the temperature in your home by evenly distributing energy from a heat source, such as a fireplace or heater, throughout your home.

  • Night Time Cooling Ventilation Systems

A night time cooling ventilation system draws fresh cool air from your southern eve (the coldest side of your home) and filters it into your bedrooms so that you can sleep well on hot, sticky and/or humid nights.

  • Wardrobe, Cupboard and Basement Ventilation Systems

We can tailor a ventilation solution for any situation, including wardrobe extraction, cupboard extraction and basement ventilation.

What Are The Benefits of a Ventilation System?

  • reduce allergies and asthma
  • have a fresher, cleaner-smelling home that is free from odours
  • use free energy efficient heat to warm and dry your home (temperature difference of 4 degrees in winter and 8 degrees in spring and autumn).
  • free natural night time cooling
  • reduce your electricity bills
  • cost-effective and permanent mould removal
  • significantly reduce moisture and resulting mildew, condensation, dampness and odours

How Do I Know If A Ventilation System Is Right For Me?

If you have any of the following, a ventilation system will be a welcome addition to your home:

  • asthma, allergies or hay fever
  • a mouldy home or a damp home or musty odours
  • condensation
  • a cold home
  • a hot home
  • unbalanced temperatures
  • a stuffy home or poor indoor air quality

My Upstairs Gets Hot

If the upstairs of your house gets hot, a solar roof ventilation and exhaust fan unit will ventilate your roof and cool your home in summer. It will also reduce moisture levels and condensation in your roof cavity in winter. Up to 20 times more effective than a whirlybird, these units are specifically designed for Australian roofs and can operate without mains electricity.

Solar powered roof ventilation provides you with a more comfortable indoor living space and saves you hundreds of dollars on cooling costs each year, assuming you use air conditioning.

How Does A Solar Roof Ventilation System Work? 

The roof ventilation unit and exhaust fan prevents heat build-up in your roof space and reduces the heat load on your ceiling, preventing heat from penetrating into your living space. This results in lower roof space temperatures as well as lower internal temperatures.

For roof ventilation systems to effectively remove heat or moisture, replacement air has to be accessible, which we commonly access via eave vents or ceiling vents. Heat or moisture can also be extracted directly through air-conditioning ducting.

Reducing Running Costs on Your Air Conditioner

After installing a whole-of-house ventilation system or a solar roof ventilation system, the efficiency of your existing air conditioning system will improve. Your air conditioner won’t need to work as hard when operating (because the temperature inside your home will already be closer to your desired temperature) and the actual running time will be reduced, as you won’t need to run the air con as often.

What Are The Best/Most Effective Brands Of Ventilation Systems?

We tend to preference HRV for Whole-Of-House Ventilation Systems. Designed and made in New Zealand, these are particularly effective at removing moisture and relieving allergies and asthma.

We’ve done our research and found that for Solar Roof Ventilation systems, the SolarWhiz is very effective at extracting heat, whilst reducing your cooling costs.

TheEnergyExperts.com.au can guide you in choosing the right ventilation or heat extraction system for your home. Get in touch so we can get a better understanding of your specific issues.

How Much Does It Cost To Run a Ventilation System?

A whole-of-house ventilation system costs very little to run (around $100/year).

A heat extraction system is very cheap to run (in fact, it’s free if you choose the solar powered option). You can opt to include a night operation kit, which continues to extract the hot air out of your roof cavity overnight. This has a very low running cost (approximately $50/year).

How Do I Know What’s A Good System And What’s Not?

You certainly get what you pay for with a solar powered ventilation system. The trick is to buy a unit that’s made by a company that has been manufacturing solar ventilation systems for at least 10 years.

You’ll want to choose a company that has an established network for warranty, support and technical assistance and case studies to back up each of its claims.

It’s also important to choose a product that’s designed for Australian roofs and conditions and is constructed from high quality materials specifically selected to prevent rust and electrolysis in harsh environments. You’ll also want a solution that has a motor which is a sealed unit to avoid dust build up, which can have an adverse effect on performance.

It’s important to choose a ventilation solution that clearly outlines the volume of air that their units move. There’s no way to determine a products’ effectiveness without this information. Look at the brochure to see how many fans are required to effectively remove the heat from a 200m2 roof cavity. An effective ventilation system will use just 1 fan.

Who Should I Choose To Install My System? 

We recommend having your ventilation system installed by a company that’s been installing systems for at least 5 years, is endorsed by the Asthma Council Sensitive Choice program and which offers a money-back guarantee on the elimination of mould, mildew and condensation.

Ventilation System Quotes

TheEnergyExperts.com.au fast-track the ventilation quotes process for you by sourcing multiple competitive quotes on your behalf from local, professional companies.

We’ve cherry picked installers in your area that have a reputation for excellence and who are very competitively priced.


Contact TheEnergyExperts.com.au to receive a free quote / initial consultation about ventilation systems, solar panels, battery storage, solar hot water, heat pumps, solar pool heating, LED lighting or insulation for your home or business.

We cover the following areas: Sydney, St George and Sutherland Shire, Illawarra, Wollongong, Shellharbour, Kiama, Shoalhaven, NSW South Coast, Macarthur, Wollondilly, Southern Highlands, Goulburn, Canberra, Central West, Central Coast, Newcastle and NSW Mid North Coast.