Diesel heater, Webasto forced air

B

baz

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Jun 19, 2009
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6,083
Fluid Motion Model
C-24 C
I'd like to know if the Webasto heater draws in outside air for heating the cabin area. If so, is there a control for making it recirculate the cabin air rather than drawing in the outside air ?

If the Webasto heater does draw in outside air is there a filter that cleans the air before entering the cabin ?

Can someone post back what the Webasto model number is for the current R-27 ?

Thanks. 🙂
 
According to the direction book you can take air either from the outside or the inside. If you draw from the inside it can't be from the engine room or in an area where it may be blocked from storage material. I did not see anything about a filter. I can't find my model number, but I am sure Andrew can tell you which model they use on the R-27. I can tell you it works great.
 
Look at the R27 Manual when all else fails.

http://www.tugnuts.com/viewtopic.php?f=7&t=1550 A wealth of information here...thanks Andrew!

The Webasto takes outside air in for combustion and exhausts it outside. As shown on page 7. Cabin air is recirculated through the unit in a separate path from the combustion air.
 
From the above two posts it seems...

1) Air for combustion is drawn in from outside and then exhausted overboard on port side. Page 7 of manual.

2) The cabin air is drawn in to the heater unit and heated by the heater's heat exchange unit and is then recirculated to the cabin. That is, outside air is NOT drawn in, heated and pushed into the cabin.

3) No evidence of there being a cabin air filter

4) No control for drawing in outside air for heating the cabin vs. recirculating the cabin air (much like one has in an automobile these days) -- unless one presumably cracks open a window, door or hatch to access and draw in fresh air.
 
Baz, you are correct.
The manual I was refering to was the Wabasto manual, not the Ranger manual. In the Wabasto manual it does suggest that you can draw combustion air from the inside, but I wouldn't do that since you then need makeup outside air. On my boat, which had the Wabasto installed by the dealer, the intake combustion air was intalled via a tube under the gunnel in the cockpit. I think he did it this way so as to avoid another hole in the hull, plus mine was installed beinfd the stove which is different from the usual installation because I also have air conditioning.
 
Thanks... 🙂

I don't know how air tight the cabin is on these Ranger Tugs when all windows, hatches and door is/are closed tightly -- which is part of my concern. Hopefully there's enough air leakage that allows outside fresh air to enter the cabin while the Webasto heater is running.

I assume my concern is not warranted if the cabin <--> outside leakage is same as one has in a car or in ones house.

I know there must be some leakage as on our R-25 we observed black soot like deposits on the monkey fur streaking into the forward V-berth area around the vertical sides of the bulkhead and actually thru the bulkhead panels separating the V-berth from the helm and navigators cubby hole. This has since been resolved by taking the panels (each panel is actually split vertically to facilitate installation) to the factory in Kent and had the monkey fur replaced with the vinyl covering and making sure the split panels are sealed properly -- done free of charge to me -- Thanks Ranger Tugs for that. Then when installing these newly covered panels I sealed the edges all around. I've seen no black sooty streaks since having done this over a year ago.
 
Barry, on our R-27, we have plenty of fresh air entering the cabin through the large cabin door as it does not seal well on the upper and lower areas of the door when latched. If one were to plumb the furnace to take outside air for cabin heat it would create a positive pressure in the cabin (while the fan is running) reducing unheated air from intruding inside the cabin, but reduce efficiency since the outside air being heated is, presumably, cooler than the cabin air temp. Mine works well as installed from the factory, but the cave gets a pretty cool breeze during the cooler months.

Ray
 
So Ray... there's no heated air exit opening to the cave area presumably ?
 
SInce my installation was after manufacture I had them run a vent to the v-berth, one in the galley area, one in the head and one in the cave. I have to say we are toasty warm and still alive. The intake, I believe, is for the combustion so there is not an issue about taking in cold outside air and having to warm it for distribution. As I think about it, I also have a return vent in the galley so you are recirculating the cabin air.
 
There is not a heated air vent in the cave (in my vessel), but it gets pretty warm there since the furnace is located under the admirals seat. The second vent from my furnace goes to the forward berth and little if any air comes out of that.
 
It seems that Ranger has modified the heated air exit vents over time. I wonder what the current configuration is these days and also wonder if it is something one can negotiate with Ranger at time of manufacture ?

The exit vent in the V-berth area is located where ?

If there's an exit vent in the cave area, where is it located ?

Where is the return vent located in the galley area ?

How noisy is the Webasto unit -- I ask this as I cannot stand motor or fan noises during my sleep time. For example, in order to reduce frequent noises from the battery charger during night time I lower the refrigerator temp control to #2 at night... also ensure there's plenty of slack in the dock lines to avoid/reduce fenders rubbing against the hull and/or dock side.
 
The Webasto heater is very quiet. The only noise is a quiet thumping from the fuel pump. We don't run it when we go to bed, preferring warm bedding and cool air. But first one up in the morning turns it on. It warms the boat fairly quickly.

As for configuration of vents, ask Ranger Tugs. We all know what they've done in the past. They know what they're doing now.

Cheers,

Bruce
 
Yea -- number of vents and vent locations are surely a moving target as all of us have different requirements as evidenced by this thread. I would imagine Ranger has a number of options to meet customer requirements during the boat build procedure.
 
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