Tag Archives: Planar

New heater #2, installation

After finding out that the heater brand “Planar”, manufactured in Russia, are being sold at less than half the price of similar German heaters, I decided to replace our old Webasto. I found a complete kit of the model 44D-12-GP-TM available from www.autoterm.cz , including a spare glow plug and freight, for only SEK 6,000. Delivery was prompt and trouble-free.

Installation was straight forward, except;
1. I replaced first three meters of heating duct (was 80mm, now 100mm). All the heating ducts have previously been insulated as it improves heating markedly.
2. Old heater had a pump lifting from the main fuel tank. New heater has a dedicated fuel tank (7 litres) – although this can be supplied from the main tank with a separate lift pump in the future. I decided for this solution so as to ensure clean fuel for the heater.
3. Connections for combustion air and exhaust are 26 and 24mm respectively, significantly smaller than the old heater, meaning that new reductions have to be made.

The heater started on the second attempt (after the fuel line had been primed…) and worked as expected.


The Planar is rougly the same size as the old Webasto, so coudl be fitted in the same location. Exhaust connection is still temporary, awaiting welding of 80-24 mm reduction. Some tidying up still left to be done…


Although manufactured in Russia, the heater is sold by Autoterm in the Czech Republic and carries a CE marking.



After installation, I was happy to confirm that the Planar actually consumed slightly less electricity than stated in the data sheet.

Heater alternatives

Prior to installing the kerosene heater (which heats the aft cabin and aft head only), we looked into


#1. Replacing our current Webasto HL3003 with a new forced air diesel heater
Benefits: Reduced draw on battery (approx 20-25% less at max setting). Reduced fuel consumption (approx 25% less at max setting). More control over settings (our current heater is either off or on full power). Can be fitted into our existing system of ducts. No new chimney needed. Uses same fuel as engine. Can be used while sailing/heeling.
Disadvantages: Cost (especially Webasto and Eberspächer, wheras Planar is less expensive). Does not supply hot tap water. Still draws about 10-60 W, depending on heat setting. Some noise.

#2. Changing to water heater
Benefits: Reduced draw on battery (approx. -50%), Reduced fuel consumption (approx -30%). Can be hooked into our hot tap water supply. No new chimney needed. Uses same fuel as engine. Can be used while sailing/heeling.
Disadvantages: Cost. Requires new distribution system + convectors. Still draws about 10-40 W.

#3. Kerosene heater (brand: POD)
Benefits: No, or minimal (1.2 W), draw on battery. Uses same fuel as lamps (we use our kerosene lamps every evening because we like them; it’s the brass, open fire thing). Almost silent. Cheap fuel (about 20% cheaper than diesel). Can be used while sailing/heeling.
Disadvantages: Smell (though not a lot, assuming that you set the wick at the proper level). Requires new chimney and new distribution system. Does not supply hot tap water.

#4. Propane/Butane heater (brand: Truma)
Benefits: Uses same fuel as cooker/oven. Can be used while sailing/heeling.
Disadvantages: Very expensive fuel (about 3 times the price of kerosene/diesel) – which is why we did not look into this further. Requires new gas installation.

#5. Diesel heater (brand: Glembring and Refleks)
Benefits: No, or minimal (1.2 W), draw on battery. Uses same fuel as engine. Almost silent.
Disadvantages: Requires new chimney and new distribution system. Does not supply hot tap water. Can not be used while sailing due to heeling.

In the end, how you weigh the different pros and cons depends on how you use the boat. For us, the wish to be able to anchor for a week in winter with no engine running required to produce electricity is an important aspect (we have a 12 V 400 A battery bank). In the end, that, combined with the cost of the Webasto and Eberspächer products, is what made us settle for the POD heater. Only later did we find the Planar brand heaters, which are about 50-70% cheaper than similar Webasto/Eberspächer, although the Planar heaters draw about 13-25% more amps, depending on the setting.

For us, even with the advantageous price of the Planar, replacing our forced air diesel heater would not have achieved the goal (no, or minimal, battery draw). But we are definitely considering the Planar for the future since it barely costs more than servicing a Webasto/Eberspächer.

When at anchor, and even more so when sailing, it is sufficient to heat the aft cabin and head (volume approx equivalent to a 25ft boat). The salon is difficult to heat when sailing, since crew passing up and down the companionway result in most heat being lost. Also, we rarely have people staying in the forepeak, nor use the forward head. Consequently, our basic heating requirement is about 1 kW. However, the possibility of occasionally heating the salon while at anchor, and even the forepeak, has some value and requires an additional 1 kW, which is the minimum setting on the new forced air heaters.