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Without proper ventilation, an airtight building would get uncomfortable quite quickly. This is why it's so important to include HVAC and ventilation strategies in any new build and retrofit / renovation.

An air tight building means:

• reduced air leakage
• reduced heat loss
• reduced moist air in assemblies.

A well ventilated air tight building means:

• Better regulation of humidity
  
• More consistent temperature for heating and cooling
  
• Better drying potential for interior materials.
  

A well ventilated, air tight building is more comfortable and longer lasting.

The performance of the Heating, Ventilation and Air Conditioning must be balanced with the modelled and tested performance of the building. The 'right sizing' of systems in the building will save money, energy and maintenance costs.

Designers, energy advisors, builders and HVAC technicians need to work closely to come up with the best building strategies and most appropriate systems.