cyril
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Re:Considering DIY'ing a Brivis Ducted Heater - 2007/09/20 16:19
External heaters should be used externally. If you are putting the unit under the house and have the room, you should use an internal, the flue must discharge outside the house, not underneath.
Airflow is irrelevant in your case. Internals have a little more air to help blow the air down from the ceiling to the floor. It wont heat the place any faster/slower.
Sounds like you should be using an internal heater under the house, with a under-floor DIY kit.
You are correct, the Brivis 5 star HE series requires a 50mm PVC flue, not metal.
Our CD-rom explains how to run all the ducting etc. The heater has instructions on how to run the flue and drain, please find the tech data below:
(I hope this answers all your questions - good luck)
Brivis Technical Data
Type: Heater Date Updated:
Category: MPS HE 20e, MPS HE 20i, MPS HE 30e, MPS HE 30i
Subject: Maximum Flue Length
The flue connection to the HE unit is 50mm Drain Waste and Vent Pipe (DWV to AS/NZS 1260) and must be installed in accordance with the following.
The flue must discharge externally in a vertically up position and be fitted with a Vent Cowl (DWV to AS/NZS 1260). The clearances required are the same as those applying to a balanced flue as per the AG 601 installation code. Seal all joints.
The minimum pipe length is 1.2M for 50mm DWV flue systems.
The maximum length of 50mm DWV flue pipe is dependant on the number of bends incorporated in the flue system as per the following table (maximum 4 bends).
Note: 45o bend = 1/2 X 90o bend.
Bends 0 0.5 1 1.5 2 2.5 3 3.5 4
Flue (M) 10 9.25 8.5 7.75 7 6.25 5.5 4.75 4
Alternatively, a 65mm DWV flue pipe system may be installed as follows:
The minimum pipe length for 65mm DWV flue systems is 4M.
The maximum pipe length for 65mm DWV flue systems is 20M and can include up to 6 bends.
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