Table of Contents
- An operating theatre typically demands 20–25 ACH of laminar or turbulent supply, much of it outdoor air, while isolation rooms need inward directional pressure and high outdoor-air fractions to contain airborne pathogens. Heating, cooling, humidifying and moving that air is the dominant energy cost in a surgical suite — frequently higher per square metre than the rest of the hospital combined. Every exhausted cubic metre carries away conditioned energy that make-up air must replace. Air-to-air recovery recovers a large part of that energy before the air leaves the building.
- In a theatre or positive/negative isolation room, the governing rule is simple: supply air must never receive moisture, particles or pathogens from the exhaust. That rules out any device where the two streams share a medium. A plate heat exchanger is the natural fit because the supply and exhaust run on opposite sides of a solid plate — there is no mixing path, so sensible-only recovery is inherently safe. Sensible-only recovery also avoids condensate pathways that a latent (enthalpy) device would create in the supply, which matters where any condensate is a contamination risk. HEPA/ULPA filters sit upstream or downstream of the core as the design requires, and the recovery device is positioned so it never compromises the pressure cascade.
- Rotary wheels are not banned everywhere in a hospital. They are reasonable in non-critical support spaces, public areas, and staff break rooms where contamination sensitivity is low and the extra latent recovery is welcome. A purge sector reduces vapour and particle carryover, and a sealed bearing with a cleanable desiccant coating keeps maintenance straightforward. But for the theatre itself and for isolation, the consensus among infection-control engineers is to keep the streams separate — plate recovery, not a wheel. Where a wheel is used, document the purge fraction and carryover test results for the commissioning file.
- Hospital recovery projects typically show a simple payback of two to four years, driven by the constant 24/7 load and the high cost of conditioned outdoor air. The saving compounds when the recovered energy also trims chiller and boiler capacity, sometimes allowing a smaller plant. Sizing follows the same rules as any high-OA application: target 60–75% sensible effectiveness, watch the pressure drop against the fan power, and add a bypass for mild seasons. If your schedule is not yet finalised, our selection guide explains the trade-offs, and we can size a core from your airflow and temperature data.
- QIYU supplies plate, rotary and heat-pipe air-to-air cores suitable for healthcare ventilation, with separation assured where infection control demands it. Tell us your theatre or ward airflow, pressure class and target effectiveness and contact us for a sized quote — WhatsApp +86 15753355505, US tel +1 (915) 295-3666, or email kuns913@gmail.com. We help you choose the right model or engineer a custom recovery package.
Hospitals ventilate harder than almost any other building type, and operating theatres and isolation wards sit at the extreme end: 20+ air changes per hour of conditioned air, strict directional pressure relationships, and zero tolerance for contaminated air reaching patients or staff. That intensity makes recovery valuable but also constrains it. This article covers where the load sits, why infection-control rules usually push you to plates rather than wheels, where a wheel is still acceptable, and what payback looks like in practice.
An operating theatre typically demands 20–25 ACH of laminar or turbulent supply, much of it outdoor air, while isolation rooms need inward directional pressure and high outdoor-air fractions to contain airborne pathogens. Heating, cooling, humidifying and moving that air is the dominant energy cost in a surgical suite — frequently higher per square metre than the rest of the hospital combined. Every exhausted cubic metre carries away conditioned energy that make-up air must replace. Air-to-air recovery recovers a large part of that energy before the air leaves the building.
In a theatre or positive/negative isolation room, the governing rule is simple: supply air must never receive moisture, particles or pathogens from the exhaust. That rules out any device where the two streams share a medium. A plate heat exchanger is the natural fit because the supply and exhaust run on opposite sides of a solid plate — there is no mixing path, so sensible-only recovery is inherently safe. Sensible-only recovery also avoids condensate pathways that a latent (enthalpy) device would create in the supply, which matters where any condensate is a contamination risk. HEPA/ULPA filters sit upstream or downstream of the core as the design requires, and the recovery device is positioned so it never compromises the pressure cascade.
Rotary wheels are not banned everywhere in a hospital. They are reasonable in non-critical support spaces, public areas, and staff break rooms where contamination sensitivity is low and the extra latent recovery is welcome. A purge sector reduces vapour and particle carryover, and a sealed bearing with a cleanable desiccant coating keeps maintenance straightforward. But for the theatre itself and for isolation, the consensus among infection-control engineers is to keep the streams separate — plate recovery, not a wheel. Where a wheel is used, document the purge fraction and carryover test results for the commissioning file.
Hospital recovery projects typically show a simple payback of two to four years, driven by the constant 24/7 load and the high cost of conditioned outdoor air. The saving compounds when the recovered energy also trims chiller and boiler capacity, sometimes allowing a smaller plant. Sizing follows the same rules as any high-OA application: target 60–75% sensible effectiveness, watch the pressure drop against the fan power, and add a bypass for mild seasons. If your schedule is not yet finalised, our selection guide explains the trade-offs, and we can size a core from your airflow and temperature data.
QIYU supplies plate, rotary and heat-pipe air-to-air cores suitable for healthcare ventilation, with separation assured where infection control demands it. Tell us your theatre or ward airflow, pressure class and target effectiveness and contact us for a sized quote — WhatsApp +86 15753355505, US tel +1 (915) 295-3666, or email kuns913@gmail.com. We help you choose the right model or engineer a custom recovery package.