Bergdorf expertly manufacture climate control systems that have been specifically designed for plant growing environments and its excellent Optima range represents the most innovative selection of products on the market. An air conditioning unit is essential if you want to run a completely detached closed loop grow room at optimum temperatures, free from negative external factors such as pests, coldess. You do not need an intake of air you just need to introduce CO2. These systems are very effective at managing environmental conditions inside the larger models of grow tent. Optima products comfortably carry out all of the core air conditioning functions described above.Yet they really do stand out from the crowd, mainly thanks to superior build quality, high performance and several key features. Night and day settings allow you to precisely target the desired temperatures for the time that your lights are on and off, which each Optima unit will hit, maintain and smoothly switch between using advanced cooling and heating capabilities. The dispersion of CO2 can be conveniently controlled through an Optima unit when it is connected up to a canister supply or growth gas generator. This carries great importance if you've created a closed loop grow room and no longer draw in fresh air from the outside (consequently halting the supply of carbon dioxide, so that the element then needs adding manually). Bergdorf Optima Split Air Conditioning Systems are also very easy to install (plug and play - no engineer required), consume low amounts of power and have an indoor and outdoor unit with a whisper quiet mode of operation. Each Optima product does include a set of carbon filters that help to actively remove unwanted airborne particles, but these are more of a supplementary provision - a separate extraction system will still lead to the best results. A basic onboard dehumidifier is included. A dehumidifier and humidifier are not required but recommened for best results. The item "Bergdorf Optima Split Air Conditioning Units 21000 BTU" is in sale since Wednesday, May 06, 2015. This item is in the category "Garden & Patio\Hydroponics & Seed Starting\Other Hydroponics". The seller is "wakefield-hydroponica" and is located in Wakefield. This item can be shipped to United Kingdom, Ireland, Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Australia, Japan, New Zealand, Israel, Hong Kong, Norway, Indonesia, Mexico, Singapore, South Korea, Switzerland, Taiwan, Thailand.