A conservatory has the obvious effect of heating up in the warm weather so when calculating the heat load for air conditioning it advised to add 40% minimum to you initial floor calculation of 100 watts / M sq. For example: If your conservatory has a 30 square meter floor then your basic heat load is (30m x 100 Watts) 3000 watts. Add your 40% solar effect and you get a basic heat load for your conservatory air conditioning of 3000 + 40% = 4200 w. 

If you are thinking about  air conditioning for the conservatory it all depends were you can site it. A low wall mounted unit can be fitted on a dwarf wall of 600mm.  A "Through the wall unit" all in one air conditioning system and has NO outdoor unit. These units are new to the UK market and are a budget all in one solution where a outdoor unit is not possible or not preferred. The air is exchanged directly through two ducted air grilles at the back of the unit which takes air from outside to cool and expels the hot air through the other. These units are placed on an internal wall and do not need a professional installation as they are pre-gassed and no interconnecting pipe is needed. The unit can be placed at low level or on a dwarf wall, ideal for conservatories. 

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