Ventilation/dehumidification — the silent 24/7 load, with heat recovery. Part of the glass family — like our glass BESS, biogas plant and CHP.
The heat-recovery unit (plate or rotary) reclaims heat from the warm, humid exhaust air and transfers it to the cold fresh air — designed at ~65 % at the reference site.
If the exchanger fouls or the bypass damper sticks, recovery drops below 30 % and ventilation heat loss doubles (chain K01). The AI detects this from the exhaust/discharge temperature spread.
Dehumidification with heat recovery (the ventilation standard for indoor pools, 36,000 m3/h):
Overview: The Glass Pool → · Markets: pool markets →
Monitored: continuously · temperatures on all four air connections
The scenario: A thin film builds on the plates. Recovery efficiency drops slowly and the heating coil simply compensates, so the loss migrates into the heat demand instead of into an alarm.
Method proven on a live European reference aquatic center; presented anonymously.
Estimate from metered / design values. Zero-grid-import windows are real (metered).
Grounded in the applicable national standards for pool water treatment, plant energy performance and building energy performance. Same knowledge base as the European reference site; presented anonymously.
The applicable standard defines the target hall climate: air temperature 30 °C ± 2 K, relative humidity 55 % ± 5 %. Outdoor-air rate at least 30 m³/h per person at full occupancy, at least 4 L/(s·m² of water surface) in base mode. For a hall with 355 m² water surface: 4 × 355 × 3.6 = 5,112 m³/h minimum; in practice The applicable standard recommends ~16,000 m³/h for comfort and pollutant removal (trihalomethanes). Heat recovery via plate exchanger at 65-75 % efficiency is standard.
Basis: the applicable national standard
The applicable standard governs ventilation with hygiene requirements. For pool halls: filter class F7 minimum, 6-month service interval. Plate heat-recovery exchangers must be able to drain condensate. Hygiene inspection every 2 years (logged in the maintenance record). Pool-specific: because of chloramines, corrosion-resistant materials (V4A stainless, plastic) are required in the exhaust stream; aluminium exchangers are not permitted in the pool-hall exhaust air.
Basis: the applicable national standard
When hall humidity is too high (rH > 65 %) the traditional fix is raising the outdoor-air rate — which doubles the heat loss in winter. The modern approach is a dehumidifying heat pump (sorption wheel or reversible compressor) that removes water directly from the hall air without raising outdoor air. Investment 30-80 k€ depending on size, payback 4-7 years. On a hall running 16,000 m³/h in cold winters a sorption wheel can save 30-50 % of the ventilation heating energy.
Basis: the applicable national standard
the pool operating guideline fixes the order for refurbishments: 1) reduce losses (envelope, pool cover, insulate the surge tank, ventilation heat recovery), 2) recover heat (heat recovery, waste-water heat, filter backwash as a heat-pump source), 3) generate efficiently (heat pump > CHP > gas). This hierarchy is decisive for public grant applications: funders check whether losses were reduced before the generation investment. Concretely: insulate the surge tank, add an outdoor-pool night cover and service the ventilation heat recovery before or together with the heat-pump installation.
Basis: the applicable national standard.10
Stromfee.US licenses the pool & wellness HVAC AI — proven in Europe, deployed on your existing plant. Single property, portfolio or chain.
Request software license →