The claim of type agnosticism
The Passivhaus standard is presented as applicable to any building type. Its criteria are expressed as performance limits — annual heating demand, primary energy, airtightness, overheating frequency — rather than as prescriptive constructions, and on that basis the claim is defensible.
But the thresholds themselves, the default assumptions embedded in the Passivhaus Planning Package, and the empirical evidence base behind both, derive overwhelmingly from dwellings in a heating-dominated Central European climate. That is not a criticism of the standard. It is a description of where its calibration came from, and it matters as soon as the building in question is not a dwelling.
What transfers and what does not
The building physics transfers. Heat loss through a wall does not depend on whether the space behind it is a bedroom or a classroom, and the fabric-first logic of the standard holds regardless of use.
What does not transfer is the boundary conditions. For a dwelling, PHPP supplies defaults for occupancy density, internal gains, hot water demand and use pattern that are well evidenced and rarely worth arguing with. For a hotel, those defaults describe nothing: occupancy is intermittent and highly variable, internal gains are dominated by equipment rather than people, and hot water demand peaks in a way no residential profile anticipates.
The engineering work therefore relocates. It stops being a question of how to meet the target and becomes a question of what the target is actually being calculated against — and that is a judgement exercise carried out by the design team, not a lookup.
The consequences for building services
Two follow directly.
The first is that very low heating loads make plant selection harder. A building with a heating demand at the Passivhaus threshold may need so little installed capacity that commercially available equipment cannot modulate down to it, and the plant spends its life cycling. The problem is not achieving the load; it is serving it well.
The second is that ventilation becomes the primary system rather than a secondary one. Mechanical ventilation with heat recovery carries both the air quality duty and a significant part of the thermal duty, which raises the consequences of duct routing, pressure drop and commissioning accuracy well above what they would be in a conventionally serviced building.
Airtightness is a services problem
The airtightness criterion is verified by measurement, not by calculation, and building services are the most common source of failure. Every duct, pipe, cable and flue that crosses the airtight line is a potential leak, and the detailing has to be resolved during design rather than negotiated on site after a failed test.