Why you should choose our services

Air conditioning units need occasional preventive maintenance to keep them operating efficiently and smoothly, mostly every quarter year or three times a year. There are other important benefits to regularly maintaining your air conditioning unit. The going green global trend has seen an increase in demand for air conditioning and refrigeration systems in Kenya that are not only energy efficient and cost-effective but also environmentally friendly for all.

We remain people-oriented, credible, and royal to our cause of improving the quality of people's lives by engaging superiority in resources and competence, in knowledge and information, and in the development of new products. We have some of the most experienced technicians who work under the supervision of professional engineers equipped with the required knowledge in the industry.

Increase the lifespan of your units with pre-planned general maintenance on your air conditioners.

Air conditioning units need occasional preventive maintenance to keep them operating efficiently and smoothly, mostly every quarter year or three times a year. There are other important benefits to regularly maintaining your air conditioning unit.

Our PPM (planned preventative maintenance) is a scheduled work plan with the main aim of keeping your equipment working efficiently, cleanly, and reliably.

We are specialists in the design and installation of hygienic areas, cold rooms and cold stores for chilled distribution centers, as well as industrial specification firewalls and partitions. Sumastar Enterprises creates temperature-controlled, sanitary environments throughout East Africa by utilizing high-quality insulated panels.From cold stores, cold rooms and hygienic food processing environments, through to chilled distribution warehouses and walk-in freezers, our experience and specialist expertise cover it all. We pride ourselves on our ability to react when requested with both consistency of product and quality of installation. We are able to provide very competitive rates throughout our product range, including modular cold rooms and all types of insulated panels.

Why you need PPM (Planned Preventative Maintenance)

How we do it

All of our service technicians are fully licensed and receive ongoing training. As part of your air conditioning maintenance visit, our licensed service technician will check and record carbon monoxide (CO) levels. Check temperatures across air handlers. Examine the temperatures and airflow across the condenser motor and compressor. Examine the current draw on the condenser motor and compressor. Test the operation of the condensation system and evaporator coil. Test the unit by putting it through its full operation cycle. Examine the superheat and subcooling readings. Examine the operating pressures.

It is for your benefit.

Regular maintenance is necessary to keep the air conditioning and heating systems running smoothly. Air conditioning and heating system maintenance requires checking for faulty AC parts and fixing them accordingly. Cleaning air filters, changing disposable filters, oiling and lubricating fan axles and motors, correcting bent fan blades and fins, and so on, are part of the maintenance.


Air conditioning maintenance can be divided into planned preventive maintenance and one-time air conditioning and heating maintenance. Preventive air conditioning maintenance is carried out on a routine basis, whereas one-time air conditioning maintenance is available to customers who need air conditioning maintenance on an emergency basis without any prior or specific planning.

Mechanical Ventilation Services and Duct Installation

Our craftsmanship in this line has been the ability to design and build both standard and non-standard equipment ventilation systems to suit various customers’ requirements, providing complete guaranteed systems. including:

  • Kitchen canopies
  • Ventilation fans
  • Duct work
  • All types of filter services
  • Our ventilation services involve

HVCA standards and/or client specifications for the manufacture and erection of mild, galvanized, and stainless steel ductwork systems.

supply and installation of complete ventilation systems to HVCA standards and/or client specifications.

Manufacture and installation of aluminum, galvanized, and stainless steel canopies, including associated extract systems.

manufacture of small-to-medium-sized mild, galvanised, and stainless steel canopies, including associated extract systems.

General fabrication work in mild, galvanized, and stainless steel (e.g. platforms, support stands, brackets etc.)


Air Handling Units (AHU)

Air handling units maintain and distribute air within a building. They take fresh ambient air from outside, clean it, heat it or cool it, maybe humidify it, and then force it through some ductwork around to the designed areas within a building. Most units will have an additional duct run to pull the used dirty air out of the rooms and back to the AHU, where a fan will discharge it back into the atmosphere. Some of this return air might be recirculated back into the fresh air supply to save energy.

Freezers Servicing

If your fridge or freezer is out of order, not cooling, overfreezing, making noises, or doing anything else out of the ordinary and you stay in Nairobi, Sumastar Enterprises is the best refrigeration service provider to contact.

We repair and service all makes and models of freezers.

To request our service, you can call us on 0721-734550, 0732-734550, or send us an e-mail at,, or We offer doorstep refrigerator repair and services for domestic refrigerators and freezers as well as commercial refrigerators.