Larger rooms needing the highest verified cooling capacity in this Trotec catalogue wave, provided the room calculation and a safe outdoor exhaust route support the choice.
Source-checked product information
Trotec PAC 3900 X Portable Air Conditioner
Model PAC 3900 X. Specification verified 12/08/2026.
13,300 BTU/h52.5 dB1,500 watts
Official manufacturer image · source logged
Who this model may suit—and the main trade-off
The compressor remains in the room. Compare the published 52.5 dB sound evidence, window fit and hose route before treating the BTU rating as a complete answer.
Regular quieter cooling or several rooms matter more than portability; compare a professionally designed split system before buying multiple portable units.
Portable vs split →Based on source-checked catalogue specifications. CoolCompare has not physically tested this model and does not claim current price or stock unless a dated offer is shown below.
Information checked12/08/2026Manufacturer and retailer sources where available
Cooling13,300 BTU/h
PriceNo recorded price
Rated input1500 W
Noise52.5 dB
Room12–52 m²
Heating technologyCooling onlyDirectly comparable
Output per rated watt is a simple derived comparison from the published cooling output and maximum rated input. It is not a seasonal-efficiency score or a laboratory test result.
HEAT MODE CHECKCooling only
The verified source record does not claim a heating mode.
Directly comparable: The same defined field is present in the verified product record.How we compare this model
Portable-v1.0 compares verified specifications against fixed portable-air-conditioner category benchmarks. The internal comparison covers output per rated watt (35), maximum noise (25), weight (15), warranty (10) and verified features (15).
Capacity itself earns no points because the right BTU depends on your room. This is not an efficiency label, product review or laboratory test, and it does not include price or affiliate value.
ROOM FIT CHECK
Will this exact model work in your room?
Check capacity, exhaust-window practicality, published sound and a maximum-input electricity scenario together before opening a retailer.
Product information and documents
What to know about the Trotec PAC 3900 X
CoolCompare has organised the manufacturer-published information below. It is not a hands-on review or a laboratory result.
A 13,300 BTU portable air conditioner with three fan stages, swing, cooling, ventilation and dehumidification.
Trotec publishes 3.9 kW / 13,300 BTU/h cooling for rooms up to 52 m² / 130 m³. The manufacturer manual records 1,500 W cooling input, 52.5 dB(A) sound pressure at one metre, 3.71 L/h dehumidification, 420 m³/h airflow, R290 refrigerant, 760 × 470 × 400 mm dimensions and 35 kg weight.
Nominal cooling3.9 kW13,300 BTU/h
Published airflow420 m³/hManufacturer specification
Moisture extraction89.04 L/dayPublished maximum
RefrigerantR290Sealed appliance circuit
Cooling energy classACheck the current energy label
Features and practical meaning
13,300 BTU/h cooling
Published cooling capacity. Use the room-fit result rather than capacity alone, especially for sunny, open-plan or poorly insulated rooms.
52.5 dB published sound
Compare the stated measurement with other models on the same basis. A portable compressor remains inside the room.
1,500 W rated input
This verified input is the starting point for the running-cost calculator. Real consumption can vary as the compressor cycles.
Outdoor exhaust required
Confirm hose dimensions in the current instructions. Hot air must be vented outside without extending or sharply bending the hose beyond manufacturer limits.
Window-kit status needs checking
The reviewed evidence does not support an included kit claim; budget for a compatible seal only after checking the opening.
35 kg unit weight
Check stairs, thresholds, storage space and the route between rooms. Castors do not remove the need to move the unit safely.
Dehumidifier mode listed
This mode can remove moisture, but published litres-per-day figures and drainage arrangements should be checked before choosing it for dedicated damp control.
Product documents and evidence
Product sources, documents and verification notes
Links open the exact source used for this catalogue record. Source pages and documents can change after our retrieval date.
MANUFACTURER
Open manufacturer brochure or manual PDF →- Model identity
- Official product image
- Cooling capacity
- cooling Capacity Kw
- Published room area
- Published room volume
- energy Class Cooling
- Operating modes
- fan Speeds
Read the source-review note
Human-reviewed Trotec Home Comfort catalogue on 13 August 2026. The locally hosted lead image is a clean crop of the exact model artwork. Catalogue inclusion is not evidence of current UK stock or price.
MANUAL
Open manufacturer brochure or manual PDF →- cooling Capacity Kw
- Rated electrical input
- Published sound
- Dimensions
- Product weight
- airflow M3h
- Moisture extraction
- refrigerant
Read the source-review note
Manufacturer operating manual used for the technical-table fields. Sound is retained as sound pressure at one metre and is not treated as interchangeable with energy-label sound power. Values remain manufacturer supplied and are not represented as CoolCompare physical tests.
How to check this model before buying
CoolCompare does not currently send product traffic to an affiliate retailer. Use the exact model code PAC 3900 X when checking retailers, then confirm the seller, total delivered price, returns route, warranty provider and stock at the destination.
No current price or stock is shown because no fresh, independently checked retailer record is available.
Estimate electricity cost from verified power input
The rated input for this model is 1500 W. Use your own tariff without assuming a purchase price.
Calculate running costSource-backed product data
Full verified specification
Values are taken from the logged manufacturer source and were last verified 12/08/2026.
BrandTrotecDirectly comparable
Model numberPAC 3900 XDirectly comparable
Cooling capacity13,300 BTU/hDirectly comparable
Rated power input1,500 WDirectly comparable
Published sound value52.5 dBManufacturer-specific test
Recommended room guidance12–52 m²Manufacturer-specific test
Dimensions (H × W × D)760 × 470 × 400 mmDirectly comparable
Weight35 kgDirectly comparable
Heating technologyCooling onlyDirectly comparable
Wi-FiNoDirectly comparable
Dehumidifier modeYesDirectly comparable
WarrantyCheck manufacturer termsBroadly comparable
Portable-unit setup matters
Vent hot air outside, keep the exhaust hose within the manufacturer’s permitted arrangement and seal gaps around the window kit. Poor venting can return warm outside air to the room and reduce useful cooling.
Comparable capacities
Compare this shortlist →Alternative models to compare
Same-brand alternative · PAC 3800 STrotec PAC 3800 S Portable Air Conditioner
13,000 BTU/h55 dB1,461 W
View verified specifications →
Similar cooling capacity · PACAP130IGENTLEJETPinguino GentleJet Inverter Portable Air Conditioner
13,000 BTU/h43–50 dB1,035 W
View verified specifications →
Same-brand alternative · PAC 3810 STrotec PAC 3810 S Portable Air Conditioner
13,000 BTU/h55 dB1,461 W
View verified specifications →POPULAR DECISION ROUTES
See all cooling routes →Continue from this model
Compare the model, check true running cost or step back to a system-level decision.
Portable shortlistCompare leading portable AC options
Source-checked capacity, sound, power and room evidence.
Open this route →
Bedroom routeFind quieter published specifications
Compare sound evidence alongside room fit and exhaust setup.
Open this route →
System choiceHeat pump or air conditioning?
Work through heating, cooling, property and installation trade-offs.
Open this route →
Installed coolingExplore split air conditioning
Understand outdoor units, indoor noise, permissions and installation.
Open this route →
True costCalculate running cost
Use verified watts, your tariff and your expected hours.
Open this route →Practical answers
Frequently asked questions
What room size is the Trotec PAC 3900 X suitable for?
The published recommendation represented in the CoolCompare catalogue is 12–52 m². Actual cooling demand also depends on ceiling height, insulation, glazing, sun exposure and internal heat, so use the BTU calculator before choosing.
How noisy is the Trotec PAC 3900 X?
The reviewed source publishes a single 52.5 dB sound value. It is not presented as an operating range; measurement type, room acoustics, fan mode and distance all affect comparisons.
How much electricity does this portable air conditioner use?
Its verified rated input is 1500 W. Rated input is not a promise of constant consumption because compressors can cycle. Use your electricity tariff and expected hours in the running-cost calculator for a transparent maximum-input scenario.
Does a portable air conditioner need to be vented outside?
Yes. A compressor-based portable air conditioner must discharge hot air outside through its exhaust hose. Keep the hose as short and straight as the manufacturer allows and seal the window opening; never extend or alter it contrary to the manual.
Model Watch history
No reviewed lifecycle change has been published for this model. This does not prove that no change exists; use the manufacturer source and UK safety checker as well.