Design without compromise – Keeping IEQ and architecture aligned
Early involvement of architects in building projects is vital—not only to design high-performing buildings, but also to ensure high indoor environmental quality (IEQ) for the people inside. Yet when design ambitions are compromised late in the process, it affects more than just aesthetics – it can directly affect the building's technical systems. Although ventilation accounts for a small fraction of overall construction costs, it is often sub-optimised because HVAC decisions can be pushed to the end of the project, leaving building occupants to pay the price in compromised indoor environmental quality.
It starts with one holistic vision from the architect
In early project phases, the architect has a strong, holistic vision. They balance building aesthetics in the urban context (how the building looks and fits into its surroundings) with creating spaces that serve multiple purposes (how space is used and utilised).
Architectural intent focuses on human-centric design and user experience, creating spaces that maximise indoor environmental quality (IEQ). Often, architects translate a client's vision into a sustainable, energy-efficient concept operating within technical, economic, and functional limitations.
Early on, architects treat all parameters holistically – blending aesthetics, function, energy and IEQ into one single vision.
From concept to construction – How vision can turn into compromise
Although the architect starts as the project lead, control shifts towards general contractors and project managers as construction approaches. They gain strong influence over technical details and building system selections.
During this shift, design and engineering can become disconnected. Technical building systems (HVAC) can be calculated in isolation rather than integrated into the early architectural concept. Late engineer involvement can lead to clashes between design aesthetics and technical equipment needs.
Consequently, late-stage optimisation becomes hidden cost-cutting. Decisions happen too late in the process and turn into simple budget cuts. Key indoor environmental features – such as thermal comfort, acoustic quality, daylighting control and optimal indoor climate – can be the first to be compromised.
The risk is that when building technical systems are implemented separately, IEQ can become detached from the original architectural vision.
Bridging the gap between architecture and engineering
To prevent the downward spiral and protect both architectural intent and indoor environmental quality (IEQ), project workflows must change from a linear, phase-to-phase way of working to early multi-disciplinary alignment – a so-called integrated design.
An integrated design process brings architects, builders, engineers and ventilation specialists to the table from day one and keeps them there through the last day of construction. Continuous, parallel collaboration and teamwork across disciplines can ensure technical requirements are shaped alongside the visual concept.
Key choices must be made early and collaboratively: early cross-disciplinary alignment, non-negotiable IEQ parameters, early digital simulations and protecting architectural vision through precise engineering and smart technology.
The invisibility of IEQ in architecture and ventilation systems
A hidden IEQ paradox exists: a low-cost item like ventilation can cause massive, long-term damage to the indoor climate when sub-optimised at the very end of building construction.
Because the ventilation systems that secure indoor climate (air quality, thermal comfort, acoustics, daylight, and more) are largely invisible, they are easy to overlook early on, leading to costly and uncomfortable problems later. It is difficult to visualise invisible air, yet it remains the most vulnerable element of any building. By the time occupants realise a space is uncomfortable, the original design ambition may already be long gone.
To protect architectural vision, engineering systems and people's wellbeing, the focus must be on interdisciplinary tools and early-phase alignment – ensuring project quality and environmental ambitions survive all the way to completion.
"The bitterness of poor quality remains long after the sweetness of low price is forgotten." — Benjamin Franklin, Founding Father, diplomat and scientist
