A money saving tip.

[rotrax]

The Webasto heating pipes on our boat were, IMHO, poorly routed by the supplying dealer. It is a blown air system with five outlets. A 90mm pipe goes from the heater unit into the engine space where it reduces to 75mm and feeds a two way 60mm diverter. This feeds the heads, owners cabin and guest cabin. The two 75mm pipes feed the pilothouse and galley.

It all worked well, but in the eight years of ownership the installation problem got worse every time I worked on the engine, especially changing the oil filter.

Four joints had to be disconnected to give access. Those of you that have such systems will know that the aluminium foil/cardboard ducting is not very durable. Not after eight years, anyway.

I decided to move the major junction towards the rear of the large engine compartment and install two new longer 60mm pipes. Only one 60mm join will have to be moved in future when changing the oil filter. I ordered what I needed, but baulked at paying £7.00 each for 75mm male connectors. I needed three.

I used bean tins instead. I removed both ends and found them perfect.

I am sure I plagarised the idea from the tunneler's of the great escape who used tin cans for their ventilation system....................................

 

[Hunterlees]

I used Heinz beans tins as connectors when modifying my system too. I installed a 3” inline fan controlled by a PWM unit to boost the output to the furthest two outlets. Very pleased with the result.

 

[wingcommander]

Like you ,ime tighter than a ducks arse at 500 fathoms. My cheap Chinaspacer came supplied with about 0.5 mtr of 60mm concertina type flexible tube .I needed to fit one outlet ,forward end of salon( with the heater in aft end of cockpit locker. I priced up the required bits and thought.....mmmmm

Ime in the heating game professionaly ,and most condensing boilers have a 60mm internal condense flue section. I installed temporarily in my garage to test out said flue ducting with regards to heat output from diesel heater.
Yes my wee boat has been happily heating me with this install.
Yes it was old removed boilers which supplied the parts, including 90 and 45 degree bends
Yes it was a barsteward to install as its all cut down 1mtr sections
Cost nowt other than labour and afew choice words during fitting
Two years later its still perfect .May now get round to making my install more permanent this winter.

 

[wonkywinch]

Fans4Less are a reasonably priced internet supplier of ducting. Used them quite a lot in my house building projects.

Fans4less Ventilation Ducting Bathroom Shower Heat Recovery Fan Shop

 

[rogerthebodger]

I did something similar when fitting my air conditioning duct on my previous boat.

I used 75 mm dia plastic ducting for the main runs and joiners were 75 mm plastic down piping.

Tees and elbows were 75 mm incursion fittings like water pipe insursion fittings.

The outlets were the vent outlets from an old ford cortina the ones with the inverted CND tail lights

 

[wonkywinch]

The outlets were the vent outlets from an old ford cortina the ones with the inverted CND tail lights

Owned a few Mk1 Cortinas in the 70's. I remember those lights also being used on ice cream vans!

 

[cowpat]

The Webasto heating pipes on our boat were, IMHO, poorly routed by the supplying dealer. It is a blown air system with five outlets. A 90mm pipe goes from the heater unit into the engine space where it reduces to 75mm and feeds a two way 60mm diverter. This feeds the heads, owners cabin and guest cabin. The two 75mm pipes feed the pilothouse and galley.

It all worked well, but in the eight years of ownership the installation problem got worse every time I worked on the engine, especially changing the oil filter.

Four joints had to be disconnected to give access. Those of you that have such systems will know that the aluminium foil/cardboard ducting is not very durable. Not after eight years, anyway.

I decided to move the major junction towards the rear of the large engine compartment and install two new longer 60mm pipes. Only one 60mm join will have to be moved in future when changing the oil filter. I ordered what I needed, but baulked at paying £7.00 each for 75mm male connectors. I needed three.

I used bean tins instead. I removed both ends and found them perfect.

I am sure I plagarised the idea from the tunneler's of the great escape who used tin cans for their ventilation system....................................

I love your use of bean tins. Don't forget old domestic appliances have SS side casings. Very thin guage and workable. A swaged seam is easy to do and you get the right Diameter. !