We are having a conservatory built (3.5mx3m)and want to use it all the year round. We have a south facing garden and have been quoted for standard double glazed wall units (brick dwarf wall) with 'solaglass' roof. Given the position and size, which low 'e' glass specification is recommended as we've been given a specification for Saint Gobain Bioclean Cool-Lite ST. We do not want a ceiling fan or blinds or air conditioning. We have specified all units to be openers in the wall and have two roof vent openers as well. We are also removing the current double glazed sliding door that is the access point from the living room to the conservatory (we hope this will help air flow in summer and heat in winter and encourage us to use it more). Can you advise whether or not a plain low 'e' glass roof will suffice in summer while being relatively easy to heat in winter? We'll be having a single electric radiator in the room. Roof height is standard at around 2.6m internal height, not sure what the apex of the roof would be.Loads of questions so apologies but we are unsure what to do!