Best heating option for 795?

[timbray]

Hi there, I use my 795 as an office and have about had it with the little electric space heater on shore power, and with the front window being perma-fogged on winter expeditions. I gather Webasto is the most popular option.  Anyone from a cold climate (I'm in Vancouver) want to pipe up with a "this worked great for me" or "stay away from this"?  Thanks in advance.

[fritz]

Mine came with the Webasto EVO 40. It's great at keeping the cabin comfortable, sips diesel, but sucks at defogging the front window. There just isn't great air flow beyond the main vent next to helm and the vent in the v-berth. 

One word of caution is the placement of the exhaust vent. It's easy to cover it accidentally if you tie a fender off to the handrail instead of the aft cleat. 

[Charlie-Bravo]

Webasto and Eberspacher are your main diesel heating options, and some swear by the Chinese and Russian varieties as they get chilly weather, so must know about heating ..... but I didn't want the possible increased fire risk,  I installed an Eberspacher, jolly good it is at heating the boat when away from shore power and the control gizmo is small neat and tidy as well as being clever but easy to operate .... but, given available shore power and your useage of the boat as an office, the noise  a diesel heater makes , although not very loud, could become irritating, planning the air inlets as well as the exhaust to be as far away as possible should be considered.
When shore power is available I heat with electric, it's a quiet and a dry heat , oil radiators for general warmth and a convector type if I need to be hot, but I don't leave the convector un attended, and if i'm not there the boat doesn't need to be hot.

I guess it depends on your available power supply but perhaps a better quality of electric heater would be the first move, and would recommend an Eberspacher if your power supply is lacking.
CB

[mf755wahoo]

Good evening

We are about to install the Webasto air top 2000 into our 755 - we have done a dummy setup in the workshop to familiarise ourselves with everything which has been a real help.

We are thinking about the exhaust setup - our kit did NOT come with an exhaust condensate thingamajig which is mentioned in the manual - we will be routing the exhaust using an 'S' bend configuration away from the heater so that the outlet is higher than the heater, but the bottom curve of the 'S' will be below the heater - if you get my drift.

Do we need the condensate coil? And if so any ideas of where to get one?

Many thanks and a Happy New Year - or Bledhyn Noweth Da as they say here in Cornwall/Kernow

[Charlie-Bravo]

Mellor online have them listed under installation accessories/ exhaust, but not in stock just now, give them a call and they might be able to tell you when they will be re stocked.
Take care with the exhaust joints , the pipes supplied leave a bit to be desired ... if yours was like mine, a spiral wound ss item , designed to leak , I used exhaust assembly paste to seal it, .. works so far.

Blwyddyn Newydd Dda as they say up here in darkest north Wales 

Happy New Year to all

CB

[mf755wahoo]

Thanks for the tip C-B 

[mf755wahoo]

We made a significant inroad towards the Webasto Airtop 2000 installation today.

We were a bit sideswiped by what appeared to be loads of partitioning under the deck making us think positioning the ducting was going to be a real challenge. However, once we had created the 1st opening in the central compartment and taken out the fridge, things looked a great deal more promising.

Notwithstanding that doing anything in boats generally requires getting into some very weird contortionist positions.......

So vents are positioned and main ducting in place. Next will be sorting the fuel tank, locating the heater and dealing with the exhaust, air intake and combustion air intake positions.







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[mf795]

Hi!

I´ve been in your situation under the winter and it has been a challenge I have seen some installations from dealers there they have taken a lot storage so my goal was to keep so much storage I can. Here is were I put my vents

  

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[rxc]

I have 2 reverse cycle aircon/heat systems on my sailboat, with air ducts, and they warm up the boat nicely, but on my previous boat (34 ft sailboat) I installed an Espar hydronic system, with three radiators around the boat. It was WONDERFUL to wake up on a cold, wet April morning in a warm, dry boat.

Hoses are much easier to run than ducts, you have thermal inertia with water, you can use the heater to make hot water without shore power or running the engine, and you can even use the engine to distribute waste heat around the boat. I could not get the AC guy to agree to install one on my 43DS - too strange, but I recommend them to anyone who really needs heat.

Only downside was that when the Espar unit lit off, it sounded like a 747 was about to land on deck. They use a small turbo to push the air thru the combuster, and it is not a sound you normally hear on a sailboat.

[dprahin]

Jan 2, 2021 19:25:10 GMT mf755wahoo said:

We made a significant inroad towards the Webasto Airtop 2000 installation today.

We were a bit sideswiped by what appeared to be loads of partitioning under the deck making us think positioning the ducting was going to be a real challenge. However, once we had created the 1st opening in the central compartment and taken out the fridge, things looked a great deal more promising.

Notwithstanding that doing anything in boats generally requires getting into some very weird contortionist positions.......

So vents are positioned and main ducting in place. Next will be sorting the fuel tank, locating the heater and dealing with the exhaust, air intake and combustion air intake positions.







View AttachmentView AttachmentView Attachment

please send more pictures when you will go further.

tnx

[Deleted]

I'm installing a Wallas 1300 myself, a parafine fuel burner, for warmth in the cabin during sailing.
I'll be using a seperate electric heater for overnights when docked.

Wallas 1300 is a simpel install, low electricity consumption, and low noise (Webasto e.a. appear very noisy + 2x expensive).

[simonmf695]

is the Wallas 1300 sufficient for a single cabin mobo such as MF 695 or 795 ?
In the UK, min temp 0C

[timbray]

Wow, I launched this thread almost a year ago, and neglected to report back.  I ended up getting a Planar 2D-12-P.  The boatyard recommended it as a whole lot cheaper than Webasto and so on.  They said "It's made in Russia".  I guess I looked a little skeptical and they explained "They make the heaters that the trans-Siberia truck drivers use." Well, OK then. Website for Planar. 

A little poking around on the Internet revealed mostly happy customers, and now I'm one too.  Placing it and running the pipes was pretty easy.  I have two vents - one mounted on the side of the platform holding the table inside, one up on top of the console, which has a rotating piece to direct the air, either onto the windshield or back into the cabin.  It works great. It seems very self-maintaining, it does that thing you should do with Diesel engines, running at full throttle for a bit when you turn it on and again when you turn it off.

I didn't get the external control with the thermostat and I don't think you need it. It also works as a fan but I haven't really used that feature. I use my boat as an office, even in winter, and even when it's down near 0°C I don't have to run it at maximum. When you do run it at maximum, the boat gets warm pretty fast.

Anyhow, here are a bunch of pictures.

[simonmf695]

minor thread drift, can i 'just' drill screw into the battery floor as shown below ?
roughly how thick is the floor, no access panels into my floor, yet
obviously not drill through the hull under too ..

[Mikeh]

I’ve got a 2.2 kW Eberspächer, installed in that space behind the fridge. I’m more than happy with it.

[mf755wahoo]

This was our ducting in the space behind the fridge

[multicamnz]

Oct 21, 2021 20:01:37 GMT timbray said:

Wow, I launched this thread almost a year ago, and neglected to report back.  I ended up getting a Planar 2D-12-P.  The boatyard recommended it as a whole lot cheaper than Webasto and so on.  They said "It's made in Russia".  I guess I looked a little skeptical and they explained "They make the heaters that the trans-Siberia truck drivers use." Well, OK then. Website for Planar. 

A little poking around on the Internet revealed mostly happy customers, and now I'm one too.  Placing it and running the pipes was pretty easy.  I have two vents - one mounted on the side of the platform holding the table inside, one up on top of the console, which has a rotating piece to direct the air, either onto the windshield or back into the cabin.  It works great. It seems very self-maintaining, it does that thing you should do with Diesel engines, running at full throttle for a bit when you turn it on and again when you turn it off.

I didn't get the external control with the thermostat and I don't think you need it. It also works as a fan but I haven't really used that feature. I use my boat as an office, even in winter, and even when it's down near 0°C I don't have to run it at maximum. When you do run it at maximum, the boat gets warm pretty fast.

Anyhow, here are a bunch of pictures.



Hi Tim, 
Im taking over a 795 in a couple of weeks and found this forum when searching for info on heaters, I was keen to see the pics that you had included in your post but unable to open these, can you send these please, any pics or info appreciated as I dont want to reinvent the wheel, regards Alan... A Newbe on this site.