Browse Forums Heating, Cooling & Insulation 1 Aug 06, 2010 11:01 am We're building an extension and want to modify our separate ducting for our heating and evaporative cooling. Both units are Brivis. Cooling is a Brivis Advance F43DA. Can anyone advise what the output of this unit is? Heating is a Brivis Multiplex Series HE20I. Can anyone advise what the output of this unit is? Both are about four years old. Cooling I used the Braemar online calculator and for the size of rooms and ceiling height we have, it recommended a 10kW evaporative unit. Cooling has three outlets into three existing bedrooms (74 cubic metres). There was then one major outlet into a living, dining and kitchen area - the ducting in the roof seems to be about 450mm diameter (the size isn't written on the side). We've removed that major outlet and broken the room up in the renovation. We now need to cool one room of 40 cubic metres and a new space of 173 cubic metres (the new extension) plus the three bedrooms (74 cubic metres). Hence there is a total of 287 cubic metres. Do we have the capacity, and can someone suggest duct sizes and outlet sizes? We don't think we have the money to pay for it to be done professionally and will source and fit the new ducting ourselves. Heating I used Dual Heating and Air-conditioning's recommendations for heating and determined that we'd need 13.7kW of heating output. At present we have three heating outlets into the three bedrooms (74 cubic metres), one into the bathroom (11.25 cubic metres), one into the 40 cubic metre room, and one spare outlet from a room that has been demolished. They all seem to have 6" (150mm) ducts in the roof, to circular outlets. I need to determine if the unit has spare capacity to heat the new space of 173 cubic metres. The new space is 5 star energy rated, with wall, floor and ceiling insulation. I was figuring on two outlets. Can someone advise if they think the unit has capacity, and would two runs of 6" ducting do, plus some sort of fitting to tap into the existing ducting? In total there would be 7 outlets, and 299 cubic metres to be heated. Thanks for any advice that may be forthcoming. Re: Brivis - modifying ducted gas heating and evap cooling 2Aug 06, 2010 11:05 am you heater would be 20kwatt. You may want consider increase the fan speed using the network controller aftert he modifcations if you need more air flow and if it isn ot set onto the heightest setting already. Re: Brivis - modifying ducted gas heating and evap cooling 3Aug 06, 2010 11:07 am Thanks B-Star, that is a relief. Re: Brivis - modifying ducted gas heating and evap cooling 4Aug 07, 2010 11:01 pm Just following up to see if anyone advise me about the capacity of the evaporative cooling unit? Many thanks! Re: Brivis - modifying ducted gas heating and evap cooling 5Aug 07, 2010 11:05 pm cheltenham3192 Just following up to see if anyone advise me about the capacity of the evaporative cooling unit? Many thanks! The Brivis website it says it is 13Kw, which is the 2nd largest model in that range. Re: Brivis - modifying ducted gas heating and evap cooling 6Aug 07, 2010 11:12 pm Thanks AJW. I searched their site for the model number and couldn't find such details. I also called them and they wouldn't tell me the capacity on the phone; instead preferring that I speak to an authorised distributor (I understand why they would have reservations). I appreciate your help. I want to build a decking to the drawn shape outlined in black. The problem is how close can I build to the gas hot water unit? Will I be able to build around it and be… 0 20231 Hi all, sorting out the ducted air con for a 350sqm double story house. Does this placement sound reasonable to you? Also, I plan to have 6 zones I think. Living room… 0 0 Hi all, sorting out the ducted air con for a 350sqm double story house. I think i plan to have 6 zones I think. Living room (mainly for entertainment so not used often),… 0 0 |