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  1. Products & Services
  2. Machinery - HomeComfort
  3. Air conditioning
  4. Comfort air conditioners of the PAC series
  5. PAC 3550 PRO

PAC 3550 PRO local air conditioner

Cooling up to 25 % more efficient due to innovative technology

Hot summers are great — but climate change lets them become hotter and hotter from year to year. What may be great fun during the holidays can become a physical strain at home. If the thermometer stays above the 30-degree limit for only a few days in a row, the brooding heat settles in the apartment. No amount of ventilation will help, then the temperature must be lowered with air conditioning.

Professional cooling with the PAC 3550 PRO air conditioner

Keep cool and an eye on the costs.

The PAC 3550 PRO mobile air conditioner operates at a cooling capacity of 3.5 kW so that the room temperature in rooms sized up to 45 m² can be cooled down at a surprising speed. The three-speed fan distributes the pleasantly cool air throughout the room. At the same time, the device filters and dehumidifies the room air to generate a refreshing feel-good climate.

Your performance plus: The PAC 3550 PRO does all this thanks to the innovative dual-hose technology — and also efficiently and cost-consciously fulfilling the requirements of energy efficiency class A!

  • Cooling by 25 % more efficient than single-hose air conditioners
  • Faster to the target temperature at lower power consumption
  • Better distribution of the cooled down room air, even in neighbouring rooms

Good to know: Single-hose air conditioners generate a negative pressure in the room. Warm outside air is thus constantly flowing back into the room. That lowers the cooling effect and may as well produce unpleasant draught (stiff neck). The PAC 3550 PRO uses two separate air hoses for cooling. Since they are only 15 cm in diameter, they can be easily attached to a window, as usual. There is no low pressure in the room, no warm outside air penetrates into the room. Yet, fresh air is constantly fed. Dual-hose air conditioners such as the PAC 3550 PRO are therefore up to 25 % more efficient.

The comfortable functions of the PAC 3550 PRO

More feel-good time thanks to intelligent control

All settings such as operating mode, fan speed and target temperature can be made on the device's control panel or via the IR remote control.

The timer function of the PAC 3550 PRO can be used to switch the device on and off automatically. The automatic mode senses whether the room temperature shall be cooled down or air shall be ventilated. A warning LED indicates when the water tank shall be emptied.

What is your required cooling capacity? An insufficient or excessive cooling capacity causes unnecessary energy costs. Just quickly calculate the required cooling capacity for your living and office spaces. Click here for more information about the calculation...

A few practical benefits:

  • 25 % more efficient thanks to dual-hose technology
  • Energy efficiency class A
  • 3.5 kW cooling capacity
  • Three operating modes: cooling, ventilation, dehumidification
  • Three fan speeds
  • Timer function
  • Practical LED display
  • Room temperature display
  • Swing function for optimum air distribution
  • IR remote control
  • Air cleaning function (animal hair, fluff, dust)
  • Quiet operation ≤ 55 dB (A)
Front view of the PAC 3550 PRO
Side view of the PAC 3550 PRO — from the right
Side view of the PAC 3550 PRO — from the right
Rear view of the PAC 3550 PRO
Display on the PAC 3550 PRO in detail
Fins of the PAC 3550 PRO in detail
SGS-tested quality

This Trotec product is supplied in SGS-tested quality, thus guaranteeing high value, safety and functionality and making sure that you are always on the safe side with Trotec brand quality.

Installation and maintenance of the PAC 3550 PRO dual-hose unit

The monoblock is set up and ready for use in just a few steps.

The two pre-installed air filters are easy to remove and clean. The condensate is collected in the integrated water tank. You can also connect a permanent condensate drain.

Tip: To install the supplied set of hoses, use the optional AirLock 200 window sealing. It allows window feed-through without loss of cool air. The hoses can be attached to any type of window (casement, bottom hung or skylight window).

The PAC 3550 PRO has two air filters which are easy to clean. They clean the air from animal hair, fluff and dust.
The air filters of the PAC 3550 PRO
The air inlet and exhaust air hoses are provided with a quick release coupling for attachment within seconds.
Mounting the exhaust air hoses with quick release coupling
Energy-efficient and easy attachment of the air inlet and exhaust air hoses using the optional AirLock 200 window sealing.
Easy attachment with the AirLock 200 window sealing

Move it in your home as needed

Compact dimensions, flexible use, elegant design

The PAC 3550 PRO is equipped with low-friction rollers and built-in handles and can be quickly moved from one location to another. The remote control is always at hand — thanks to the integrated holder. 

The built-in carrying handles allow a quicker change of location.
Carrying handles on the PAC 3550 PRO
On the low-friction rollers, the PAC 3550 PRO can be positioned as needed.
Low-friction rollers of the PAC 3550 PRO
When the device is stored after use, the remote control is stored in the practical holder.
Remote control and holder of the PAC 3550 PRO

All important features at a glance

Cooling capacity
With its 3.5 kW the air conditioner provides a pleasantly chilled feel-good climate.
Cooling capacity
Dehumidification function
The humidity level in the room can be reduced even without the cooling function.
Dehumidification function
3 fan settings
The room air is circulated even when the cooling function is switched off.
3 fan settings
Automatic mode
Controls the cooling level depending on the ambient and target temperature.
Automatic function
Swing function
Ideal air distribution thanks to on-demand swing function of the fins.
Swing function
Remote control
Control your air conditioner conveniently using the infrared remote control.
Remote control
LED display
The LED display provides information on all important parameters.
LED display
Detection of faults and precise indication of the source of error.
Night mode
Helps you to sleep healthily by way of a slow, constant temperature increase.
Night mode
Timer function
The air conditioner automatically switches on or off after the desired period.
Timer function
Room thermostat
The current room temperature is determined by the integrated thermostat.
Room thermostat
Air filter
Anti-bacterial, washable filter for air quality improvement.
Air filter
Two-hose technology
Constant supply of fresh air and up to 25 % more efficient than one-hose technology.
Two-hose technology
Condensation recycling
Reduces the energy demand and the need for frequent draining of the tank.
Condensation recycling
Thanks to the low-friction castors the air conditioner can be positioned as needed.
Climate know-how from Trotec

Monobloc or split? One-hose or two-hose technology?

Don’t get hosed by competitive statements, we provide the big picture. Before purchase make sure to get an overview of device differences, functional principles and possible applications.

Trotec, your climate expert, has compiled the most important facts in a reader-friendly overview! Direct link to the “Practical knowledge concerning air conditioning“ …


PAC 3550 PRO Local Air Conditioner show in Trotec online shop

PAC 3550 PRO Local Air Conditioner

Air conditioner PAC 3550 PRO (max. 3,5 kW): up to 25% more efficient cooling thanks to innovative technology. The mobile air conditioner PAC 3550 PRO with its cooling capacity of 3,5 kW lowers the temperature quickly in rooms up to 45 m².

524.36 £ incl. VAT
Show net price (VAT not included)



Technical data
General information
  Article number
Cooling capacity
  Max. cooling capacity [kW] 3.5
  Max. cooling capacity [Btu/h] 12,000
Recommended room size
Amount of air
  Stage Max. [m³/h] 380
  stages 3
Dehumidification performance
  max. [l/h] 1.3
Attainable room temperature (min.)
  depending on operating conditions [°C] 17
Cooling medium
  Cooling medium Air
Surrounding conditions
  Min. temperature range [°C] 7
  Max. temperature range [°C] 35
Electrical values
  Mains connection 230 V/50 Hz
  Power input [kW] 1.3
  Nominal current consumption [A] 5.7
  Recommended fusing [A] 10
Electric connection
  Connection plug CEE 7/7
  Cable length [m] 1.8
  Type of cooling agent R-410A
  Amount of cooling agent [g] 685
  GWP factor 2,088
  CO2 equivalent [t] 1.43
  Suction Side pressure [MPa] 1
  Discharge Side Pressure [MPa] 3.5
Sound values
  Noise emission [dB(A)] according to EN ISO 3745:2012 62 dB(A)
  Stage 1 - Distance 1 m [dB(A)] 50
  Stage 2 - Distance 1 m [dB(A)] 52
  Stage 3 - Distance 1 m [dB(A)] 55
Exhaust air hose
  Total length [m] 1.5
  Diameter [mm] 150
  Length (packaging excluded) [mm] 430
  Width (packaging excluded) [mm] 470
  Height (packaging excluded) [mm] 840
  (packaging excluded) [kg] 32
Equipment, features and functions
Condensate draining
  Exhaust air
  With water tank
  With condensate drain
  Water tank [l]
Timer function
  Switch-off time preselectable
  Switch-on time preselectable
Room thermostat
Room air filter
  Readily accessible
Additional functions
  Dehumidification function
  Ventilation function
  Automatic function
  Swing function
  Adjustable air discharge direction
  Sleep mode
  Automatic error diagnosis
Control panel
  Infrared remote control
  Electronic control panel
  Microprocessor-controlled operation
  LED display
  Carry/transport handle(s)
  Plastic wheels
  Rubber-tyred metal wheels
  Non-marking full-rubber wheels
  Swivel casters with parking brakes
  Adjustable bar handle

 standard equipment

 optionally available

 not available


AirLock 200 Window Sealing show in Trotec online shop

AirLock 200 Window Sealing

The energy-saving mounting solution for air conditioning units with one- or two- hose technology! Let out the exhaust air from your air conditioner- but don't let in warm, stuffy air!Quick to install AirLock 200 does not let through rain and insects.

You save: 50 %

36.75 £ 18.35 £ incl. VAT
Show net price (VAT not included)


AirLock 1000 Door and Window Sealing show in Trotec online shop

AirLock 1000 Door and Window Sealing

The energy-saving solution for air-conditioning units with standard and dual-hose technology! Leaves the exhaust air of your air conditioning outside - but prevents warm, stuffy air from the outside to come in! It has a circular length of 560 cm and is ideal for terasse doors.

You save: 49 %

45.51 £ 22.96 £ incl. VAT
Show net price (VAT not included)


Alternative products

PAC 3550 PRO with alternative products:

start comparison
PAC 3500 Mobile Local Air Conditioner show in Trotec online shop

PAC 3500 Mobile Local Air Conditioner

The monoblock unit is ideal for use in rooms up to 115m³. An energy class A rating and a cooling performance of 3.5kW add to the low running costs. And here are one or two practical additional features: an IR remote control and a programmable 24-hour timer.

You save: 119.59 £

487.55 £ 367.96 £ incl. VAT
Show net price (VAT not included)


Daily rent:
14.40 € incl. VAT per day


PAC 3500 E Local Air Conditioner show in Trotec online shop

PAC 3500 E Local Air Conditioner

The 3 in 1 air conditioner PAC 3500 E with cooling capacity of 3,5 kW: fast cooling, refreshing ventilation, powerful dehumidification!

You save: 165.58 £

487.55 £ 321.97 £ incl. VAT
Show net price (VAT not included)


PAC 3500 X Local Air Conditioner show in Trotec online shop

PAC 3500 X Local Air Conditioner

The monoblock device is ideal for usage in rooms up to 115 m³. With a low energy consumption class A and a high cooling capacity of 3.4 kW it convinces with economic efficiency. Functional detail: an IR remote control and a programmable 24 hours timer function.


Price on request

PAC 3200 E A+ Local Air Conditioner show in Trotec online shop

PAC 3200 E A+ Local Air Conditioner

The air conditioner PAC 3200 E A+ is the energy saver amongst mobile air conditioners, and it convinces with an energy saving of 20% compared with air conditioners in energy class A. Other attractive features of PAC 3200 E A+ are 3.2 kW cooling capacity, three fan speeds, timer and much more...


Price on request

Local air conditioner PAC 3900 X show in Trotec online shop

Local air conditioner PAC 3900 X

A comfortable range of functions and cooling technology of the latest generation make the multi-functional air conditioner PAC 3900 X a true all-rounder. With a cooling capacity of 3.9 kW, the air conditioning unit of the PAC series is recommended as a cooling solution for large rooms up to 130 m³.

You save: 156.40 £

524.36 £ 367.96 £ incl. VAT
Show net price (VAT not included)


PAC 4100 E Local Air Conditioner show in Trotec online shop

PAC 4100 E Local Air Conditioner

In summer, by record temperatures the air conditioner PAC 4100 E runs on top form. The for monoblocks unusual high cooling capacity of 4,1 kW ensures refreshing cooling even at temperatures around 40 degree mark in no time at all.


Price on request