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Calorex Vaporex DH33 Series Through the Wall Dehumidifiers for Indoor Pools

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The Calorex Vaporex range of pool dehumidifiers represent an excellent balance of value for money and quality.

The DH33 models extracts 1.25 litres of water from the air per hour.

They are designed for small to medium sized pool rooms.

Please call us for help on sizing dehumidifiers.

Calorex Vaporex DH34 Swimming Pool Dehumidifiers

The Calorex Vaporex units are made in the UK to high quality standards. Each unit is tested before leaving the factory.

The DH33 range has a defrost option available which is required for pool rooms where the air temperature will fall below 15c when the dehumidifier is operating.

Through The Wall Model

The DH33 are Through the Wall models. This allows them to be installed inside the plant room. 

Small ducts then pass through the wall into the pool hall

Calorex Vaporex DH34 Swimming Pool Dehumidifiers


  • Through The Wall Model (TTW)
  • High moisture extraction for low power consumption
  • Zero ozone depleting refrigerant
  • Low internal operating pressures = long useful life
  • Fan cycle or continuous mode
  • Air outlet adjustable to horizontal or vertical
  • Hot gas defrost (allows operation to 5°C air temperature)
  • Many options for flexible installation
  • Remote humidistat and on/off function

Calorex Vaporex DH34 Swimming Pool Dehumidifiers


  • LPHW air heater - fed from a gas or oil boiler
  • Air filter


  • Indoor pools
  • Therapy pools
  • Health clubs and wellness centres
  • Hotels and spa pools
  • Holiday parks and campsites

The dehumidifiers can either just dehumidify the air, or they can also heat the air. In order to heat the air in the pool room, you can use an existing boiler (eg gas or oil) to provide LPHW (low pressure hot water) to the unit.

As the unit dehumidifies the air, it will then also heat it using the heat supplied by the LPHW supply. 

These units can be located in the plant room, as they come with the fixings to allow the Through the Wall Installation.

Calorex Vaporex DH34 Swimming Pool Dehumidifiers


They extract about 30 litres of water per day

  • Air delivery 440m3 per hour.
  • Power consumption 750W.
  • Noise level 48dBA.
SpecificationsUnitsDH 33/34
Operating temperature range °C 5-35
Dehumidification @ 30°C/60% RH l/h 1.25
Heat recovered to air @ 30°C/60% RH kW 1.9
Air flow m3/h 440
External static pressure Pa 0
Sound pressure level @ 3m dB(A) 48
Refrigerant   R407c
Power supply V/Hz 230/1ph/50
Nominal power consumption kW 0.75
FLA A 4.4
Maximum supply fuse A 10
LRA (compressor start) A 15
Heater type   Optional LPHW
Heat output @ 80°C flow kW 3
Flow rate l/min 5
Product size (w x d x h) mm 780 x 255 x 653
Weight kg 37
Condensate drain size
(flexible plastic hose)
mm ID 16

Available Models

The dehumidifiers are available in several types:-

  1. Wall mounted dehumidifier
  2. Wall mounted dehumidifier with Defrost
  3. Wall mounted dehumidifier with 3kW LPHW Heating
  4. Wall mounted dehumidifier with Defrost and 3kW LPHW Heating


Calorex Vaporex DH34 Swimming Pool Dehumidifiers



All Calorex Vaporex Dehumidifiers have a 2-year parts and labour warranty.

Lead Time

The lead time on Calorex Vaporex Dehumidifiers is normally around 3-5 days subject to availability.


The manufacturer's brochure can be downloaded using the link below:-


Duratech BrochureCalorex Vaporex User Manual


The base price of the dehumidifier is shown at the top of this page

You can add the options to obtain the correct price including the additions.


  • Model: Calorex DH33 TTW Dehumidifier
  • Shipping Weight: 40kgs
  • Manufactured by: Calorex