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Diesel Air Heater

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Carlosailfan View Drop Down
Captain
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Joined: 06 March 2014
Location: Belgium
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Carlosailfan Quote  Post ReplyReply Direct Link To This Post Posted: 01 April 2022 at 10:45
We also have the factory installed D4 and in winter time when it is freezing, 4 KW is in my opinion not enough if you ask a quick response for heating. After a few hours it is comfortable.

good luck !


Best regards
/C
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Fendant View Drop Down
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Joined: 03 November 2012
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Fendant Quote  Post ReplyReply Direct Link To This Post Posted: 01 April 2022 at 11:45
I have fitted a small electric fan infront of the outlet in the forecabin. It helps , but ubulukutu is right, you have to close the aft cabin and head outlets to get heat to the front.
Frank
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Keakaka View Drop Down
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Joined: 02 August 2020
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Keakaka Quote  Post ReplyReply Direct Link To This Post Posted: 07 April 2022 at 01:58
Hi all, we have a 388 with the Eberspacher D4 heater. It works well but installation was a big project.
Major problems getting the electrics connected to the correct wiring -took 6 hours - make sure your service people have done it before. 
Also make sure the diesel supply line is primed full before you connect to the heater unit otherwise the heater cuts out because the pump cant suck up the fuel
We ran the ducts along the starbd side with vents into the rear cabin, saloon and forward berth. We get 4 degree temp lift in 15 minutes. We had trouble with suction pressure on the intake of the heater and had to disconnect a duct hose that was intended to draw air from inside the boat- the heater was cutting out thinking there was a blockage. I just take air directly from the lazarette. I put a small baffle plate in front of the heater intake to stop fenders or gear blocking or damaging the intake fan. I havent insulated the ducts yet but it seems to be OK.
This is not a rehearsal. Go for it. Kiakaha
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Goat View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Goat Quote  Post ReplyReply Direct Link To This Post Posted: 30 April 2022 at 19:45
Thanks for all the useful info.  We have just about achieved the installation of an Airo 5m from mvheating.co.uk .  Running the ducting went better than expected due to factory fitted cut outs, just needed a slight enlargement on the port side to run through from the lazerette.  We have outlets in each aft cabin, head and in the salon (aft end near sink, open).  Wiring needed to be run back to the battery as at start up the heater draws up to 25 amps, it took a bit of time to realise that! The angled through hull for the exhaust from MV marine was elliptical and would have been very difficult to fit so was changed for a straight Webasto one exiting to port side of the transom. Only issue remaining is the fuel.  The brass cap was fused to the alloy pick up which had to be cut off.  A new valve miraculously still fitted the remaining thread but with a big air leak meaning the heater kept shutting down. We are waiting on trying a new valve on this but the heater runs very well off a short term solution of using a tonic bottle as a fuel tank!  Overall the heater is excellent and very quickly warms the boat through, a very good addition.  Total cost of the install has been around £1800.
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