Hi, Just looking for an opinion on installing this system in the house, air tight heating and ventilation system. I went down to our house at the weekend and what greated me was miles of ductwork (in all different sizes) that even krypton factor wouldn't have a look at!! It basically is a giant puzzle which we have to put together with all the heat recovery units interlinked to these, and then after that make the house airtight by covering everywhere in plastic. I think our heating engineer ballet danced around the amount of work involved. Our plasterer had to be delayed again which didn't go down to well. Did anyone else get a shock when they received delivery of this heating system. Is it more daunting an idea than the actual amount of work involved?? A few days off work I think!!