Applications Residential

This applies to both single family & multiple occupant dwellings.

Multiple occupant buildings such as townhouses, units and apartments will often have a common exhaust system connecting multiple dwellings. Air Leaks on these exhaust systems cause a lack of air flow especially at the far reaches of the duct run which results in a build-up of moisture and odours. This build-up can lead to corrosion and Air Quality issues including the growth of Mould, Yeast and Bacteria. There is also a rise in energy usage which must be met by the Body Corporate.

Why Aeroseal?

Are you looking for ways to reduce your home’s energy costs, improve indoor air quality (IAQ), fix your ventilation issues and extend equipment life? What is often neglected is the ductwork delivering your air. Unless a duct has been hand sealed across every possible joint there is every chance that there is a myriad of small leaks and possibly some major ones. This leakage wastes fan power, conditioned air and may allow the ingress of unconditioned outside air or air from other sources. Aeroseal seals leaks from the inside out. It can reduce leakage by 90%, saving up to 30% of HVAC Energy. It can seal leaks up to 15mm (5/8”) throughout a system regardless of construction, installation & access.

Residential problems caused by leaky duct work include:

  • Inadequate air flow to some zones
  • Comfort issues with cold or hot spots
  • High Electricity Bills
  • Increased Cooling or Heating Capacity Needs
  • Unexplained odours or fumes
  • Poor or Inconsistent Exhaust from Toilets, Bathrooms or Laundries
  • Inadequate Moisture Management

But there’s a simple solution to this costly problem. You can reduce your energy and equipment repair costs resulting from compromised ductwork with the most advanced duct sealing in the industry - Aeroseal Certified Duct Diagnostics and Sealing.

Cleaning of ducts may be required before the Aeroseal process takes place if there is a build-up on the ducts of greater than 3mm.


We can investigate & seal all types of HVAC Ducts & Systems

Air Conditioning ducts including:

  • Supply Air Ducts and Plenums
  • Return Air Ducts and Plenums
  • Ventilation Ducts including
  • Toilet, Bathroom & Laundry Exhaust Duct
  • Car park Exhaust Duct


Aeroseal is the most effective, affordable, and viable method of sealing duct leaks. Just like anywhere else, ducts in residential buildings leak.

Leaking ducts cost you money via:

Increased Energy Consumption

With fan power representing 40-50% of HVAC energy usage, leakage costs can be significant due to the increase in fan speed to compensate for leakage; even 15% leakage can lead to an increase in system fan power of 40%. The performance of variable speed drives on fans is increased when leaks are reduced. If conditioned supply air is lost to the atmosphere it must be replaced with unconditioned outside air which must be heated or cooled & dehumidified to maintain conditions. This adds additional load to the air conditioning plant increasing power usage.

Thermal Loss – Comfort Issues

When supply air escapes, variations in temperature between rooms and floors occur affecting comfort levels in the space. The system is unable to supply sufficient air quantity to the far reaches of the duct run if air is leaking and pressure is lost due to small holes in the duct. This results in tenant comfort issues and complaints of stuffiness in occupied spaces.

Indoor Air Quality Issues

Lack of sufficient air flow, infiltration of outside or contaminated air from unexpected sources such as garages or laundries can all lead to Indoor Air Quality issues. Ventilation systems in Multi-Tenant buildings are designed with sufficient air to remove the build-up of odours and moisture from areas such as Toilets, Bathrooms and Laundries. If this moisture is not removed it may lead to the growth of Mould, Yeast & Bacteria which can be detrimental to the health of occupants.

Equipment Overload

Your system will run longer and harder than specified to compensate for air loss pressure drop, additional loads and temperature fluctuations; this could lead to increased maintenance costs and premature component replacement.

Building Code Issues

Leakage could lead to ventilation building code issues relating to lack of adequate exhaust in Toilets, Bathrooms & Laundries, along with excessive fan power use. This may lead to an increase in moisture build-up causing corrosion and Indoor air quality issues.


When purchasing and operating your air conditioning system you will be concerned with on-going running costs. Air leaks in ducts represent a large waste of energy with potential comfort and air quality issues. The computerized duct leakage system performed by Aeroseal Duct Sealing will illustrate the duct leakage before and after sealing. This information can be used to calculate your reduction in energy costs. The benefits of improved comfort and Indoor Air Quality are something that only you can calculate. To positively seal all potential leaks in a new system involves a great deal of care during both manufacture and installation. There is still the potential that there will be an issue on site. The Aeroseal process can be used before commissioning to give the best opportunity to seal the entire system in position from the inside out. In the current era of high efficiency design and equipment, NABERS, Green Star and Commercial Building Disclosure, air leaks in ductwork are an unsustainable loss which must be rectified.

Until now there has not been an effective, efficient and affordable way to seal leaks. The Aeroseal process has now changed that. Remember Aeroseal “seals from the inside”.


Could you find and seal the leaks in these ducts?