Dantherm CDP50T Through The Wall Dehumidifier – Professional Pool Environment Humidity Control 🌊

Transform your indoor pool environment with the Dantherm CDP50T, Denmark’s premium through-the-wall dehumidifier engineered for superior moisture control. Extracting up to 52 litres per day, this professional-grade unit combines whisper-quiet operation with energy-efficient performance, making it the ideal choice for indoor pools, spa facilities, and therapy pools where precise humidity control is essential.

The CDP50T represents the pinnacle of Scandinavian engineering in pool dehumidification technology. Unlike standard dehumidifiers, this through-wall design offers space-saving installation with the main unit mounted in an adjacent equipment room, keeping pool areas uncluttered while delivering powerful, consistent humidity control.

Key Benefits:

• Exceptional Capacity: Removes 52 litres daily (2.1L/hour) at optimal conditions
• Ultra-Quiet Operation: Just 44 dB(A) – quieter than normal conversation
• Space-Efficient Design: Through-wall mounting keeps equipment rooms tidy
• Energy Efficient: Advanced R407C refrigerant system with SEC rating of 0.48 kWh/L
• Commercial Quality: Built to withstand harsh pool environments with epoxy-coated coils
• Intelligent Control: Adjustable humidity settings from 40-99% RH with automatic operation

📋 Complete Technical Specifications

Performance Data

Specification	CDP50T Details
Model	Dantherm CDP50T Through-Wall
Dehumidification Capacity	52 litres/day (2.1 L/hour)
Air Flow Rate	680 m³/hour
Operating Temperature Range	10°C to 36°C
Humidity Range	40-100% RH (adjustable 40-99%)
Sound Level	44 dB(A) at 1 meter
Refrigerant	R407C (0.9kg) – Ozone friendly
Protection Class	IPX4
Filter Type	PPI 15

Electrical Specifications

Electrical Data	Value
Power Supply	230V / 1 Phase / 50Hz
Power Consumption	1.5 kW (maximum)
Current Draw	6.6 Amps (maximum)
Recommended Fuse	13A motor-rated
Heat Output	2.53 kW to air (dehumidification process)
SEC Rating	0.48 kWh/L at 28°C, 60% RH

Physical Dimensions

Dimension	Measurement
Width	1148 mm
Height	700 mm
Depth	304 mm
Weight	66 kg
Wall Opening Required	760mm (width) × 395mm (height)
Condensate Drain	3/4″ BSP connection

📄 Technical Documentation & Downloads

Access comprehensive product documentation to support your installation and maintenance:

📄 Dantherm CDP Service Manual (opens in new tab)
Complete 36-page technical manual covering installation procedures, electrical wiring diagrams, control panel operation, maintenance schedules, troubleshooting guides, and spare parts lists. Essential reading for installers and service technicians.

📄 CDP Dehumidifier Product Brochure (opens in new tab)
Product range overview with detailed specifications for all CDP models, optional accessories guide, LPHW and electric heating options, and application recommendations. Perfect for comparing models and planning your installation.

💡 7 Standout Features That Make The CDP50T Exceptional

1. Through-Wall Installation Innovation 🏗️

Benefit: Mounts directly through the wall between your pool room and equipment room, keeping noisy components away from swimmers while maximizing floor space. The split design means cleaner aesthetics and easier maintenance access.

2. Whisper-Quiet 44dB Operation 🔇

Benefit: At just 44 decibels, this is quieter than a normal conversation or library environment. Ideal for therapy pools, hotel spas, and residential installations where peace and relaxation are paramount.

3. Professional-Grade Construction 💪

Benefit: Epoxy-coated evaporator and condenser coils resist chlorine corrosion, while powder-coated metal parts withstand harsh pool environments. Built in Denmark to last decades, not years.

4. Intelligent Defrost System ❄️

Benefit: Advanced temperature monitoring prevents ice buildup on the evaporator, ensuring consistent performance even when ambient temperatures drop to 10°C. The system automatically switches to hot-gas defrost mode when needed.

5. Energy-Efficient R407C Refrigerant System ⚡

Benefit: Modern refrigeration technology delivers a Specific Energy Consumption (SEC) of just 0.48 kWh per litre extracted – significantly lower running costs compared to older dehumidifier models.

6. Adjustable Humidity Control 🎯

Benefit: Set your desired humidity level anywhere from 40-99% RH via the integrated control panel. The unit automatically cycles on/off to maintain your exact target, with built-in hysteresis preventing short-cycling.

7. Comprehensive Connectivity Options 🔌

Benefit: Modbus RTU (RS-485) for Building Management System integration, USB port for data logging, external RH/T sensor compatibility, alarm outputs, and optional heating coil control. Future-proof your installation.

🌊 Pool & Room Suitability Guide

Recommended Pool Sizes

The CDP50T is engineered for medium to large indoor pools and high-humidity environments:

Pool Volume	Pool Surface Area	Suitability
Up to 35m³	Up to 20m²	✅ Excellent
35-50m³	20-30m²	✅ Very Good
50-70m³	30-40m²	✅ Good (optimal conditions)
70m³+	40m²+	⚠️ Consider CDP70T model

Pool dimensions based on 30°C pool temperature, 28°C air temperature, 60% target RH

Room Volume Coverage

Optimal Coverage: 150-250 m³ room volume
Maximum Coverage: Up to 300 m³ (depending on moisture load)

Best Applications:

• ✅ Residential indoor pools (6m × 4m typical)
• ✅ Small hotel pool facilities
• ✅ Therapy and hydrotherapy pools
• ✅ Spa treatment rooms
• ✅ Wellness center pool areas
• ✅ Holiday park indoor pools

⏱️ Dehumidification Performance Estimates

Typical Drying Times

Understanding how quickly the CDP50T can reduce humidity helps with planning and expectations:

Starting Humidity	Target Humidity	Room Volume	Estimated Time*
80% RH	60% RH	150 m³	4-6 hours
80% RH	60% RH	200 m³	6-8 hours
80% RH	60% RH	250 m³	8-10 hours
70% RH	55% RH	150 m³	2-3 hours
70% RH	55% RH	200 m³	3-4 hours

⚠️ Important Disclaimer: These are estimates based on optimal conditions (28-30°C, moderate moisture load, properly sealed room). Actual performance varies with room temperature, infiltration rates, pool water temperature, bather load, and ventilation. Initial drying periods may be longer.

Continuous Operation Performance

Condition	Expected Moisture Removal
Average Pool Use (4 hours/day)	30-40 litres/day
Heavy Pool Use (6+ hours/day)	45-52 litres/day
Optimal Conditions (30°C, 60% RH)	52 litres/day (maximum capacity)
Lower Temperatures (15°C)	25-30 litres/day (reduced capacity)

💰 Running Cost Analysis

Energy Consumption Comparison

Understanding your running costs helps justify the investment in quality equipment:

Scenario	Daily Usage	Power Consumption	Daily Cost*	Annual Cost*
Light Use	8 hours/day	12 kWh	£3.36	£1,226
Moderate Use	12 hours/day	18 kWh	£5.04	£1,840
Heavy Use	18 hours/day	27 kWh	£7.56	£2,759
Continuous	24 hours/day	36 kWh	£10.08	£3,679

*£0.28 per kWh (UK average 2025)

Cost Comparison vs. Alternatives

Solution	Annual Running Cost	Upfront Cost	5-Year Total
CDP50T Dehumidifier	£1,800*	£2,500**	£11,500
Basic Consumer Unit	£2,200*	£800	£11,800
Pool Cover Only	£0	£1,500	£1,500
Excessive Ventilation	£3,500+	£3,000+	£20,500+

*Estimated moderate use scenario (12 hrs/day)
**Typical retail price – contact for current pricing

💡 Key Insight: While a pool cover reduces moisture, it doesn’t eliminate it. The CDP50T combined with a quality pool cover provides optimal humidity control with lower running costs than ventilation-only solutions.

🔧 Installation Requirements & Considerations

Installation Clearances

For optimal performance and serviceability:

• Minimum clearance from ceiling: 225 mm
• Minimum clearance from floor: 225 mm
• Wall thickness requirement: Suitable for walls 100-300mm thick
• Wall opening dimensions: 760mm (W) × 395mm (H)
• Service access: Allow 500mm front access for filter maintenance

What’s Included

✅ CDP50T dehumidifier unit
✅ Through-wall mounting brackets
✅ Wall suspension bar
✅ Wall mounting spacers (2x)
✅ Installation manual

What You’ll Need (Not Included)

• Through-wall duct kit with grille (order separately – essential for installation)
• 3/4″ BSP drainage pipe and fittings
• Electrical supply cable (2.5mm² minimum)
• 13A motor-rated fuse/MCB
• Optional: Condensate pump (if gravity drainage not possible)

Professional Installation Recommended

⚠️ Important: This is a through-wall installation requiring structural modifications, electrical connection, and refrigerant system knowledge. Professional installation by a qualified HVAC technician is strongly recommended to ensure:

• Correct structural support
• Proper electrical safety
• Optimal airflow and performance
• Warranty compliance
• Building regulation compliance

🛡️ Warranty & Quality Assurance

2-Year Manufacturer Warranty:

• Year 1: Parts AND labour coverage
• Year 2: Parts coverage

Quality Certifications:

• ✅ CE Marked – Complies with EU safety standards
• ✅ ISO 9001 Registered Quality Management
• ✅ Built in Denmark to EN 60335 safety standards
• ✅ RoHS compliant – Environmentally responsible
• ✅ REACH Regulation compliant

🌟 Optional Accessories & Upgrades

Enhance your CDP50T installation with these factory-approved accessories:

Climate Control Accessories

📱 DRC1 Wireless Remote Control
Monitor and adjust settings from up to 30 meters away. Perfect for installations where the wall-mounted control panel is not easily accessible. Features include remote humidity adjustment, mode selection, and fault indication.

🌡️ External RH/T Sensor
Place a remote humidity and temperature sensor in the optimal location within your pool room for more accurate control. Particularly useful in large pool halls where stratification occurs.

Heating Integration Options

♨️ LPHW (Low Pressure Hot Water) Air Heating Coil
Integrate with your existing boiler system to provide supplementary heating. The CDP50T LPHW variant adds 5.28 kW heating capacity, bringing total heat output to 6.72 kW when combined with dehumidification heat recovery.

🔌 Electric Heating Coil (3.5kW)
For installations without access to a hot water system, add a 3.5kW electric heating element. Total heat output reaches 4.53 kW when combined with the dehumidification process.

🎛️ Control Valve for LPHW Heating
Automated temperature control valve for precise climate management when using the hot water heating option.

Installation Accessories

📦 Floor Mounting Kit
Convert your through-wall unit to floor-standing configuration if wall mounting is not feasible. Includes stabilizing feet and mounting hardware.

🌬️ Through-Wall Duct Kit
Essential accessory including filter frame, extension kit for thicker walls, and aluminium grille for a professional finish. Seals the installation against drafts and water ingress.

🔌 Duct Lead-In Adapter
Enables connection to ductwork for distributed air delivery in larger installations or when direct room mounting is not optimal.

❓ Frequently Asked Questions

General Operation Questions

Q: How loud is the CDP50T in operation?
A: At just 44 dB(A) measured at 1 meter distance, the CDP50T is one of the quietest pool dehumidifiers available. This is quieter than normal conversation (60 dB) and comparable to a quiet library. The through-wall design further reduces noise in the pool area by locating the compressor components in the equipment room.

Q: What humidity level should I set for my pool room?
A: For optimal comfort and building protection, maintain 55-65% relative humidity. The recommended setting is 60% RH which prevents condensation on windows and cold surfaces while remaining comfortable for swimmers. Lower settings increase running costs; higher settings risk condensation damage.

Q: Can the CDP50T operate in cold pool rooms?
A: Yes. The unit operates effectively in temperatures from 10°C to 36°C. However, performance is optimized between 28-32°C. At lower temperatures, the intelligent defrost system automatically manages ice buildup on the evaporator coils. Note that dehumidification capacity reduces at temperatures below 20°C.

Installation Questions

Q: Can I install this myself, or do I need a professional?
A: Professional installation by a qualified HVAC technician is strongly recommended. The installation requires structural wall modifications, electrical work complying with Part P Building Regulations, and understanding of refrigeration systems. Improper installation voids the warranty and can create safety hazards.

Q: How thick can my wall be for through-wall installation?
A: The standard through-wall duct kit accommodates walls between 100-300mm thick. For thicker walls, extension kits are available. Walls must be structurally sound enough to support 66kg and the mounting brackets.

Q: Where does the condensate water go?
A: The unit has a 3/4″ BSP drain connection at the base. This must be connected to a drain with a minimum 2% fall (gradient). If gravity drainage isn’t possible, install a condensate pump. Expect 52 litres per day at maximum capacity, so drainage must be adequate.

Performance & Sizing Questions

Q: What size pool can the CDP50T handle?
A: The CDP50T is ideal for pool surface areas up to 30m² (approximately 6m × 5m pools). This translates to water volumes up to 50m³ in most residential installations. For larger pools or commercial facilities, consider the CDP70T model (69L/day capacity).

Q: Why is my dehumidifier running constantly?
A: Continuous operation may indicate: (1) Humidity setpoint is too low; (2) Excessive moisture sources (check for leaks, poor pool cover use); (3) Inadequate room sealing allowing humid air infiltration; (4) Unit undersized for the moisture load; (5) Insufficient ventilation causing temperature buildup. Review the troubleshooting section in the service manual.

Q: How does the CDP50T compare to just opening windows?
A: Opening windows in winter causes massive heat loss (potentially £3,000+ annually in heating costs) and doesn’t effectively control humidity. In summer, external air may be more humid than pool air. The CDP50T provides controlled, consistent dehumidification while returning heat to the room, making it far more energy-efficient and effective.

Maintenance Questions

Q: How often does the filter need cleaning?
A: The PPI 15 air filter should be inspected and cleaned monthly under normal use. More frequent cleaning (every 2 weeks) is recommended for heavily used pools or dusty environments. Simply remove the front grille, take out the filter, wash in warm soapy water, allow to dry completely, and reinstall. A dirty filter significantly reduces performance.

Q: What maintenance does the CDP50T require?
A: Monthly: Clean air filters. Quarterly: Check condensate drainage is clear; inspect for any corrosion or damage. Annually: Professional service including vacuum cleaning evaporator and condenser coils, electrical connection checks, refrigerant pressure verification, and control system testing. Use the service interval function on the control panel to track maintenance schedules.

Q: Can I use a timer to reduce running costs?
A: While possible, this is not recommended. Intermittent operation can cause humidity spikes leading to condensation damage. The CDP50T is designed for continuous operation with automatic cycling based on humidity levels. This provides optimal energy efficiency while maintaining consistent conditions. If cost is a concern, ensure the humidity setpoint is not unnecessarily low (60% RH is optimal).

Technical Questions

Q: What does the SEC rating of 0.48 kWh/L mean?
A: Specific Energy Consumption (SEC) indicates how much electricity is needed to remove one litre of water. At 0.48 kWh/L, the CDP50T is highly efficient. Lower SEC values mean lower running costs. This represents the energy efficiency at optimal conditions (28°C, 60% RH).

Q: Is the R407C refrigerant environmentally safe?
A: R407C is an HFC refrigerant that is ozone-friendly (zero ODP – Ozone Depletion Potential) but does have a Global Warming Potential (GWP) of 1774. It’s currently an approved refrigerant under F-Gas regulations. At end-of-life, the refrigerant must be professionally recovered and recycled according to regulations. The CDP50T contains 0.9kg of R407C.

Q: Can I connect the CDP50T to my building management system?
A: Yes. The unit includes Modbus RTU (RS-485) connectivity for integration with Building Management Systems (BMS). This allows remote monitoring of humidity levels, operating status, fault conditions, and control of the unit via your BMS. Modbus documentation is available from Dantherm support.

🏆 Why Buy From Parts4Tubs?

✅ Authorized Dantherm Dealer – Genuine products with full manufacturer warranty
✅ Expert Technical Support – Our team understands pool environments
✅ Competitive Pricing – Professional quality at fair prices
✅ Fast Delivery – Quick dispatch on in-stock items
✅ Installation Support – We can recommend qualified installers in your area

📞 Need Help Choosing?

Not sure if the CDP50T is right for your installation? Our technical team can help:

• Pool size assessment – Ensure correct capacity for your needs
• Installation advice – Discuss structural and electrical requirements
• Accessory recommendations – Optimize your system with the right options
• Running cost calculations – Understand your operational expenses

Contact us today for expert guidance on creating the perfect indoor pool environment.

Technical Specifications Summary Box

CDP50T Key Specs
Capacity	52 L/day (2.1 L/hr)
Noise Level	44 dB(A)
Air Flow	680 m³/hour
Power	1.5 kW / 230V / 6.6A
Dimensions	1148×700×304mm (W×H×D)
Weight	66 kg
Temperature Range	10-36°C
Humidity Range	40-100% RH
Refrigerant	R407C (0.9kg)
Warranty	2 Years
Origin	Made in Denmark 🇩🇰

⚠️ Important Notes:

• All performance figures based on air at 30°C and 60% RH
• Professional installation required for warranty validation
• Ensure adequate drainage and electrical supply before ordering
• Through-wall duct kit sold separately (essential for installation)
• Specifications subject to change without notice
• Designed for indoor pool environments – not suitable for general domestic use