About the DEH-800WP

The DanVex DEH-800WP is a professional inverter pool dehumidifier designed for the smaller-capacity end of the wall- and floor-mountable range. With 80 L/day dehumidification capacity, it covers pools up to 35 m² and rooms 80–130 m² — private residential pools, hotel pools, villa pools, wellness centres, gym pools, small SPA facilities, boutique food production, museums, wine cellars, and other compact commercial environments where moisture control runs continuously alongside corrosion resistance, air-quality control, and low noise.

Most dehumidifiers on the market perform a single function: removing moisture. The DEH-800WP was designed around a different question — what does the air in a residential pool hall, hotel SPA, or museum actually need? The answer: moisture control, active sterilisation, real-time air quality monitoring, corrosion resistance against chlorine and chemical vapours, and energy efficiency — all integrated into a single quiet unit.

The DEH-800WP shares an identical full-feature specification with its larger sibling, the DEH-1200WP — same compressor type, same air purification, same sensors, same connectivity. The two differ only in capacity and the size of the space they cover.

Full Inverter System: Compressor + EC Fan + EEV

The core of the DEH-800WP is a fully inverter-based refrigeration system — three components working together rather than independently:

• Inverter compressor — varies speed continuously based on real humidity readings. No on/off cycling, no humidity spikes, no peak-current surges on every restart.
• Inverter EC fan — adjusts airflow independently of the compressor, optimising performance at each operating condition rather than running at a fixed speed.
• Electronic expansion valve (EEV) — replaces a fixed capillary tube or thermostatic expansion valve (TXV) with precise electronic control of refrigerant flow, improving efficiency by 15–20%.

Combined effect: up to 40% less electricity consumed compared to fixed-speed units running the same duty cycle. Below 36 dB(A) at 1 metre — quieter than a normal conversation, comparable to a library. This makes the DEH-800WP particularly suitable for residential and hospitality environments where audible compressor cycling would be disruptive. It also holds humidity stable without fluctuations and runs continuously 24/7, with the compressor driver cooled by additional refrigerant flow.

E-Coating: Corrosion Protection That Matters

The electrochemical anti-corrosion coating (E-Coating) on the evaporator and condenser is one of the most consequential features of the DEH-800WP — and the least visually obvious.

Standard aluminium heat exchangers in pool environments can begin corroding within 1–3 years under chlorine vapour exposure. In heavy-use commercial pools, in conditions of elevated chlorine concentration, or in similarly aggressive environments, corrosion can appear within months. The same applies to salt spray in coastal facilities, acids and cleaning agents in food production, and solvent vapours in industrial settings.

E-Coating — the same technology used in automotive manufacturing — creates a sealed protective layer that resists:

• Chlorine and chloramine vapours (swimming pools)
• Salt vapours and spray (coastal facilities, salting lines, fish processing)
• Organic acids, oils, and cleaning agents (food and beverage production)
• Industrial solvents and chemical vapours (manufacturing, laboratories)

UV Steriliser + Anion Generator: Active Air Purification

UV Sterilisation

A UV-C lamp in the airflow path eliminates bacteria, mould spores, and viruses as air passes through the unit — without chemicals, replaceable filters, or additional equipment. Particularly effective in:

• Pool environments — bacteria from pool water become airborne and recirculate through the room. UV neutralises them at source.
• Food production — reduces microbial contamination risk in processing and packaging areas.
• Medical and pharmaceutical — supports clean-room and hygiene protocols.
• Museums and archives — prevents mould forming on paper, canvas, textiles, and wood.

Anion Generator (Ioniser)

The ioniser produces negatively charged ions that bind to airborne allergens, fine dust, and bacteria, causing them to precipitate out of the air. In pool facilities this reduces chloramine irritants — the compounds responsible for eye and skin discomfort in swimmers — that standard ventilation alone cannot fully address.

5-in-1 Air Quality Sensor: What It Measures and Why

Standard dehumidifiers measure one thing: humidity. The DEH-800WP monitors five parameters simultaneously, all readable on the unit display, in the mobile app, and through Modbus RTU RS-485 to the facility BMS:

• CO₂ — a direct indicator of ventilation adequacy. Levels rise rapidly in occupied pools and gyms; the reading is displayed, logged, and can trigger an alert when fresh-air ventilation is insufficient.
• PM2.5 (fine particles) — particles below 2.5 microns — mould spores, bacteria fragments, chloramine aerosols. Elevated PM2.5 in a pool hall is an early warning of microbial activity or chemical off-gassing, detectable before it becomes visible or hazardous.
• TVOC (total volatile organic compounds) — chemical vapours from cleaning products, pool chemicals, adhesives, and coatings. High TVOC is a health hazard and accelerates heat exchanger corrosion.
• Relative Humidity (RH) — the primary control parameter, measured precisely and continuously.
• Temperature (T°) — ambient temperature monitoring for operational optimisation.

Built-in monitoring eliminates the need for external hygrostats, transducers, and dedicated air-quality sensors — reducing installation cost and integration complexity.

Hot Gas Defrost: 3 Minutes, from +5°C

Below +18°C, a conventional dehumidifier’s evaporator begins to ice up. Conventional defrost methods — passive (compressor off, fan running) or electric heater — take 20–30 minutes, during which dehumidification stops entirely. In an unheated pool hall in winter, that is a meaningful gap.

The DEH-800WP uses Hot Gas Defrost: warm refrigerant gas routes directly over the evaporator surface. The cycle completes in 3 minutes. The unit operates continuously and effectively at temperatures from +5°C — covering unheated pool halls, cold storage, early spring and late autumn operation, and logistics facilities where ambient temperatures drop below normal heated-building ranges.

Installation: Wall or Floor — One Unit, Two Options

• Wall mounting — bracket included in the standard package. All service components accessible via the front panel; maintenance without removing the unit from the wall. Particularly suitable for residential and hospitality settings where keeping the floor clear matters.
• Floor installation — 6 adjustable aluminium feet for levelling on uneven surfaces.

The powder-coated steel casing with internal pyramid-shaped acoustic foam keeps operating noise below 36 dB(A). Both installation options use the same unit — the choice is made on site, no separate SKU or configuration.

Connectivity and BMS Integration

• Wi-Fi — remote control, monitoring, and alerts via mobile app from anywhere.
• Modbus RTU RS-485 — full integration into building management systems (BMS / SCADA).
• Both protocols active simultaneously — no configuration trade-off.

Set targets, review logs, receive alerts, and adjust parameters remotely. For residential installations, Wi-Fi alone is usually sufficient — the unit can be monitored and controlled from a smartphone without any additional infrastructure. For hotels, wellness centres, and other facilities with BMS infrastructure, the DEH-800WP integrates directly without additional gateways.

Technical Specifications — DEH-800WP

FAQ — DEH-800WP

Related Models & Series

• DanVex DEH-WP Series overview — comparison, application guide, market positioning
• DanVex DEH-1200WP — 120 L/day, pools up to 60 m², rooms 110–240 m²
• Ducted dehumidifiers — DD / DD-F / DD-FX for integrated HVAC and large facilities