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  PWM Series – Petra Wall Mounted Vertical Package Unit


• Wide Range of Capacities:

PWMc - R407c- 1.7 T.R. to 4.2 T.R. @ 50 Hz - 1.8 T.R. to 4.6 T.R. @ 60 Hz 

• Quick and Easy installation and maintenance

• Extremely quiet operation

• Smart Control


The Petra wall-mounted (PWM) air conditioner is a self-contained energy efficient system, which is designed to offer maximum indoor comfort at a minimal cost without using valuable indoor floor space or outside ground space. This unit is the ideal product for versatile applications such as new construction, modular offices, school modernization, telecommunication shelter units, portable structures, and correctional facilities.  Factory or field installed accessories are available to meet specific job requirements.


• A variety of features and options allows customization to suit any customer requirement

• Fan will operate on the battery backup in the event of a power failure, bringing in 100% outside air (optional)

• Designed for telecommunication applications, the units are equipped with high efficiency compressors and wide surface coils, for high sensible/
  total ratio, where other units would require a higher total capacity to achieve the same sensible cooling

• Economizer will save energy by using the outside air

• The optional sound attenuation package is used in locations close to residential areas

• Optional electric heaters are available in one or two stages, depending on the required capacity

• Easy to Install - Plug-in capability allows for installation at the integrator's shop or at the job site

• Service Panels Provide easy access to the components from the outside

• Washable filters are provided with the unit

• A complete range of dedicated accessories makes installation easier and faster. The majority of components are mounted in the front of the unit
  and arranged in separate compartments, which means complete accessibility for regular maintenance of the unit.

• Flexible Integrated Microprocessor control

All models specifications are subject to change without prior notice.
Petra Engineering Industries Co. is a market leader as a designer and manufacturer of sophisticated, high quality commercial and industrial HVAC equipment.
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Disclaimer: “These are pictures of representative customers who have purchased air conditioning, heating, refrigeration or ventilation equipment from Petra Engineering Industries. Our inclusion of these pictures should not suggest that these customers endorse our products."