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Posted By: jockassairflow pro flexible ducting
Posted By: GaryBThe DV71 is a dog however, not to be touched with a bargepole.
Posted By: GaryBThe DV71 is a dog however, not to be touched with a bargepole.SFP of 3.03 for 3 wetrooms, 6 times worse than the best units available. Efficiency of 91% doesn't compensate for this miserable performance.
Posted By: GaryBI agree with Tony - don't use flexible ducting, it increases the specific fan power of the system amd costs much more to run.
Posted By: GaryBAs a rule, the closer an MVHR system operates to its maximum capacity, the higher the SFP. I prefer to specify units which operate in the middle of their range as this gives a good balance between SFP and cost. They tend to run quieter, too.
Posted By: borpinThe Airflex Pro ducting wins for me as it is 75mm OD so I can get it round the back of my Oak Frame. I also think it will be significantly quicker to install and with long bends nice and quiet.
Posted By: Simon StillWhat sort of cost increment are we talking about
Posted By: Simon Still- avoids sound transmission between rooms
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