Heat Recovery Ventilation Systems Sydney
                     Heat Recovery Ventilation
Energy-Efficient Fresh Air Solutions
Building Performance & Sustainability
What is Heat Recovery Ventilation?
A mechanical ventilation system that removes stale indoor air while recovering its heat 
energy to precondition incoming fresh outdoor air.
• Continuous fresh air supply without heat loss
• Works with heat exchangers to transfer thermal energy
• Ideal for airtight, modern buildings
• Available as HRV (heat recovery) or ERV (energy recovery)
How HRV Systems Work
• Warm, moist air extracted from interior spaces
• Air passes through heat exchanger core
• Heat transfers to incoming cold outdoor air
• Stale air exits; fresh, pre-warmed air enters
• No mixing of indoor and outdoor air streams
HRV vs ERV Systems
HRV (Heat Recovery)
Recovers heat only. Best for cold climates. Preheats incoming air in winter.
ERV (Energy Recovery)
Recovers heat and moisture. Better for humid climates. Works year-round.
Energy Efficiency Benefits
• Recovers 80-90% of heat from outgoing air
• Significantly reduces heating and cooling loads
• Lower energy bills and operating costs
• Maintains consistent indoor temperature
• Reduces HVAC system workload by 25-40%
Indoor Air Quality Improvements
• Continuous replacement of stale indoor air
• Advanced filtration removes allergens and pollutants
• Reduced CO₂, odors, and volatile organic compounds
• Better health outcomes for occupants
• Alleviates allergy and asthma symptoms
Moisture & Comfort Control
• Maintains optimal indoor humidity levels (30-60%)
• Prevents mold growth and moisture damage
• Eliminates drafts and temperature inconsistencies
• Creates consistent comfort throughout the home
• Protects furnishings and structural integrity
Key System Components
• Heat Exchanger: Core that transfers thermal energy
• Supply & Exhaust Fans: Manage airflow direction
• Ductwork: Distributes air to/from rooms
• Filtration: Removes dust and allergens
• Control Unit: Manages system operation
Installation Requirements
• Best for airtight homes (less than 3 ACH50)
• Requires ducting in walls and ceilings
• Central unit placement (attic or utility room)
• Professional commissioning and balancing
• Regular maintenance and filter replacement
Applications
Residential
Passive houses, new construction, energy-efficient retrofits
Commercial
Office buildings, schools, hospitals with high occupancy
Cold Climates
Regions with heating demands; exceptional heat recovery
Maintenance & Operation
• Replace filters every 6-12 months
• Annual system inspection and cleaning
• Monitor pressure gauges for proper balance
• Seasonal adjustments for humidity control
• Professional commissioning after installation
Key Takeaways
• HRV/ERV systems recover 80-90% of thermal energy
• Significant energy savings on heating and cooling
• Dramatically improved indoor air quality
• Better moisture and humidity control
• Essential for sustainable, airtight buildings
Your Trusted Passive House Builder
In Sydney Australia