A Word About Mass Balance Equations

Why green buildings often prove a bit tricky!

 

Making IAQP Simple — Not Complicated

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One of the most common reasons engineers hesitate to design indoor air quality (IAQ) systems using ASHRAE 62.1’s Indoor Air Quality Procedure (IAQP) is the perception that mass balance equations are complex, time-consuming, and risky.

In reality, this complexity is often overstated.

The IAQP does not require new or unusual inputs. It relies on the same fundamental data already used in every conventional HVAC design:

• Occupancy

• Space usage

• Ventilation rates

• Equipment loads

• Contaminant sources

The difference is simply that IAQP evaluates air quality performance, rather than assuming that higher volumes of outside air automatically deliver better outcomes.

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Yes, the calculations are more detailed.
No, they are not more difficult.

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Removing the Barrier Entirely

To make IAQP design as straightforward as possible, we remove the burden from the engineering team.

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We do this in two ways:

1. Dedicated IAQP Software for Engineers
We provide engineers with purpose-built software that performs the mass balance calculations automatically. Inputs are familiar. Outputs are clear. Results are defensible and aligned with ASHRAE 62.1.

2. We Do It For You - At No Cost
When AtmosAir is specified, our technical team can complete the IAQP modelling on the engineer’s behalf - quickly, accurately, and free of charge.

 

This eliminates:

• Additional design time

• Calculation risk

• Learning curve concerns

 

Engineers remain in full control of the HVAC design, with validated IAQP results provided as part of the documentation set.

The Outcome: All the Benefits, None of the Friction

By making IAQP easy to apply, engineers and project teams unlock:

• Up to 50% reduction in outside air

• Smaller HVAC equipment

• Lower cooling loads

• Reduced CapEx and OpEx

• Improved IAQ, health, and productivity

• Simplified pathways to LEED, WELL, and FitWel credits

This is not about adding complexity to HVAC design.
It’s about using better tools to design smarter buildings.

Designed to Help Engineers Succeed

IAQP is not experimental. It is a recognised ASHRAE pathway.
The calculations are not difficult. They are simply more precise.

Our role is to make sure precision does not become a barrier to better outcomes.

Cleaner air. Lower energy. Easier design.