Do Chinese Cabin Heaters Come With a Room Thermostat?

I have just confirmed that the Chinese controllers do have a room temp sensor inside them for use in the deg Celsius setting, however they are not very accurate.

As for where to draw heating air from, this has been done on here many times. On a boat recirculating the same stale damp air leads to a damp boat.
 
mrangry said:
I have just confirmed that the Chinese controllers do have a room temp sensor inside them for use in the deg Celsius setting, however they are not very accurate.

As for where to draw heating air from, this has been done on here many times. On a boat recirculating the same stale damp air leads to a damp boat.
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If the air for combustion is also taken from inside, you are guaranteed to have a constant flow of fresh air coming in.
 
NormanS said:
If the air for combustion is also taken from inside, you are guaranteed to have a constant flow of fresh air coming in.
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The Eberspacher installation instructions specifically say do not take the combustion air from the accommodation (but you may, though are not required to, draw the heating air from the accommodation).

Update: The instructions I was referring to here are old (early '80s) and upon re-inspection are focused only on vehicle installations. The latest Eberspacher instructions specifically for boats that I quote at post #25 below suggest always drawing fresh (heating) air from outside, not from the accommodation. So either Eberspacher have changed their minds about recirculating the heating air through the accommodation in all cases, or they think (either now, or both now and 1980s) that is undesirable in boats.
 
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From the current Eberspacher instructions (D4 Airtronic):

'Combustion air must be drawn from a well-ventilated area at atmospheric pressure (not from the cabin).'

'In sailboats, the heater is usually installed in the ship’s locker. The combustion air is drawn in from the locker and the exhaust gases are fed to the outside through the transom. In boats, the fresh air is always drawn in from outside. The Airtronic's heat exchanger heats up the air that has been drawn in and it is fed through a hose system to heat the saloon area, the cabins and the galley.

The ideal scenario for motorboats is to install the heater in the engine compartment. The combustion air is drawn in from the engine compartment and the exhaust gases are fed to the outside through the transom. Here, too, the fresh air is always drawn in from outside. The heater’s heat exchanger heats up the air that has been drawn in and it is fed through a hose system to heat the saloon area, the cabins and the galley.'
 
NormanS said:
Does it say why?
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Not that I have found, but it's fairly obvious that the combustion intake is open to the combustion chamber, therefore there is a real risk of exhaust fumes entering the accommodation in the event of faulty or sub-optimal operation, which is a risk to life.

There is also the less dangerous but still undesirable risk of fuel etc. odours, even when the heater is not in operation.
 
From the current Autoterm Planar (Russian) heater (D2) manual -

'The air for combustion must not be taken from the interior, living space, engine or luggage compartment of the vehicle or vessel. Air should be taken from well-ventilated areas or from outside of the vehicle or vessel.
The maximum length of the air intake pipe is 2 meters. The air pipe must be as short as possible (cut to the necessary length).
It is forbidden to use the heater without an air intake pipe.'

'The air for heating must be taken from clean space protected from rain, splashes, dirt, water and without exhaust gases. Never draw air from the engine compartment.
Fresh air from outside or recirculated air from rooms can be taken for heating.
- Intake of fresh air.
The air is taken from outside, heated and supplied to inner rooms. This operation renews air in heated spaces and lowers humidity.
- Air intake from inner rooms.
In this case, heated air is taken from inner rooms. The advantage of such option is fast heating due to better use of heat. However, this operation does not lower humidity, and the air in the heated spaces is not renewed.'
 
LittleSister said:
The Eberspacher installation instructions specifically say do not take the combustion air from the accommodation (but you may, though are not required to, draw the heating air from the accommodation).
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Never known anyone to take combustion air from anywhere other than where the heater is mounted. Be strange to do otherwise
 
QBhoy said:
Never known anyone to take combustion air from anywhere other than where the heater is mounted. Be strange to do otherwise
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Don't understand that

Little Sister's post clearly defines that the unit is supplied with an air intake pipe of 2m (so the air is taken from 2m away from the unit and 2m is a long way in a yacht - though the 2m pipe can be cut short.

I do confess that having a heater in an engine bay and drawing air from the bay would be undesirable - diesel is seldom a favourite air freshener and seems detectable by the female olfactory system even in trace amounts.

Jonathan
 
Neeves said:
Don't understand that

Little Sister's post clearly defines that the unit is supplied with an air intake pipe of 2m (so the air is taken from 2m away from the unit and 2m is a long way in a yacht - though the 2m pipe can be cut short.

I do confess that having a heater in an engine bay and drawing air from the bay would be undesirable - diesel is seldom a favourite air freshener and seems detectable by the female olfactory system even in trace amounts.

Jonathan
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Combustion air. Not blown heated air intake. All the best
 
My recently purchased Chinese heater can be set to Hertz (cycles per second/ pump ) or switched to a temperature managed controller. My old d4 eber was temperature controlled but seemed to be somewhat erratic, which is just one of many reasons why it has been pulled out of the boat. I've been exploring the Hz setting on the chinese heater and I think I prefer it as it does not go off on little up down wandering adventures. Not bothered to try the therm option yet.
 
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