Browse Forums Heating, Cooling & Insulation 1 Feb 16, 2011 12:26 pm Re: Actron ESP Ultima and Ducting, Zoning Questions!! 6Feb 24, 2011 11:37 pm You get what you pay for! Re: Actron ESP Ultima and Ducting, Zoning Questions!! 9Mar 08, 2011 1:52 pm @ 3m/s velocity the following diameter ducts will carry 200mm (8") 95 l/s 250mm (10") 150 l/s 300mm (12") 210 l/s 3m/s is recommended for the final connection to the vents in residential applications. There are various types of flexible duct and if noise becomes an issue (it shouldn't) their is 'acoustic' rated duct which is typically quieter than standard flex. basic calc for a room / area = L x W x H x 3.54 = l/s x 0.0176 = kW. You can use the 150w/m2 but it doesn't factor the volume if ceiling heights are abover standard (2.45m). This calc factors volume first and then converts to kW This is for a standard application with no North / West facing windows - insulated etc. You get what you pay for! Thanks for that! Yeah, I was thinking timber front door. 10 21781 4 11265 Personally, considering your layout (study/work desks in bedrooms), I don't think you have any other option but to leave NW windows and make them as big as possible e.g.… 7 10601 |