Profile: Crystal Sigma Ltd. specializes in offering air-conditioning, refrigeration, ventilation, heating & plumbing, electrical and building maintenance services. We provide climate control solutions for all seasons by installing systems that provide cool fresh air when the temperature soars and warmth in the colder months. We specialize in air conditioning and heating systems, from initial design & installation through to maintenance contracts. We install various air conditioning systems including wall mounted, floor standing, floor/ceiling mounted, ceiling suspended, 4 way blow cassette, built-in ducted, slim and high static ducted air conditioners. We also specialize in break down & repair, process cooling, temperature controlled & pressurized pack houses, bespoke systems for laboratory & other research environments, ultra low temperature cabinets for storing scientific samples, chilled counter displays, and blast freezers. Our Daikin Altherma total heating and cooling system is based on heat pump technology & represents a flexible alternative to a fossil fuel boiler, with a cooling and sanitary warm water option. Its outdoor unit extracts low temperature heat from the surrounding air and increases its temperature. Upgraded heat is then transmitted via the refrigerant circuit to the indoor hydro-box. The indoor hydro-box transfers the heat in the refrigerant to the water circulated in the central heating radiators, under floor heating system and sanitary hot water tank. The system can also provide moderate cooling via the under floor heating system or radiators by limiting the water temperature. We design and install industrial & commercial ventilation systems including fume removal for factories, warehouse, office & production areas of all kinds.