How many Ah per day for Chinapscher?

B27

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As per title really.
I have a generic diesel hot air heater, how many amp hours should I expect to use running it for e.g. a couple of hours in the evening and half an hour in the morning?
 

fredrussell

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That depends on what speed fan is running at. Do you have it ticking over on low, or is it going full speed?

But generally speaking, for four hours a day it won’t be much. At a guess, one or two amp hours.
 

Plum

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As per title really.
I have a generic diesel hot air heater, how many amp hours should I expect to use running it for e.g. a couple of hours in the evening and half an hour in the morning?
Spec for Eberspacher below, probably similar to chinaspacher:


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B27

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Thanks all.
I think the 'off' consumption in the table is when the unit keeps the fan turning for a while during cool-down, that would make sense with the air flow quoted.
The control circuit seems to use a few tens of mA when completely idle, I've taken the fuse out because the illumination was a bit irritating at night.

I'll put 10Ah in the budget for an overnight.

It's time to be planning 'late season' jaunts!
 

fredrussell

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I beg to differ. I have measured the consumption of mine at nearly 4 amps, at full power, so that would be 10 AH for the usage the OP expects. Or 1/8 of my battery capacity.
I was thinking more of one operating at ‘tickover’ - about an amp per hour I think.
 
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geem

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Surely the amount of current used depends on the volume of the space you are trying to heat. If the unit needs to run at high speed for a long time to get a high volume space up to temperature before dropping back to low speed then you will use considerably more power
 
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oldharry

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Surely the amount of current used depends on the volume of the space you are trying to heat. If the unit needs to run at high speed for a long time to get a high volume space up to temperature before dropping back to low speed then you will use considerably more power
No, they dont usually have a thermostat. They just go n churning out heat at whatever setting you choose. They start at full heat during warmup. They do use a little more power at full belt obviously, as the fan is working harder. Some do have a preset temprature setting, but most people find it isnt sensitive enough to be worth bothering with. Mine just carries on churning out heat regardless! If you want a room thermostat facility you pay seven times the price and buy a 'proper' one from Eversplasher...
 

ProDave

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No, they dont usually have a thermostat. They just go n churning out heat at whatever setting you choose. They start at full heat during warmup. They do use a little more power at full belt obviously, as the fan is working harder. Some do have a preset temprature setting, but most people find it isnt sensitive enough to be worth bothering with. Mine just carries on churning out heat regardless! If you want a room thermostat facility you pay seven times the price and buy a 'proper' one from Eversplasher...
Mine must be different, it does have a temperature setting and the closer it gets to that setting, then the power output from the heater reduces and the fan speed reduces, so you can have it running at a low power and slow fan speed just to maintain the warmth.
 

oldharry

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Mine must be different, it does have a temperature setting and the closer it gets to that setting, then the power output from the heater reduces and the fan speed reduces, so you can have it running at a low power and slow fan speed just to maintain the warmth.
Interesting. Mine does have a temprature setting, but it is so insensitive that its nto worth using: it willget far too hot befroe it switches off, and far too cold before itcomes back on again. Maybe something to do with where the sensor is fitted, but a with a t/stat worked pretty well - when it could be persuaded to stay lit, which wasnt too often!
 

plumbob

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Interesting that there is consumption even when off, never knew that.
To get approximate Ah figure, multiply Watts by time in hours and divide by 12.
I have always left the programmer on. Didn't realise it has much of a drain on supply. Excellent item but needs a main switch.
 

wingcommander

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Glow plug also kicks in on turn off . To reduce carbon build up . Mine tested with clamp meter measures 9 amp on switch on / and off . Only for a minute then drops to 1amp during normal operation.
 

B27

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Surely the amount of current used depends on the volume of the space you are trying to heat. If the unit needs to run at high speed for a long time to get a high volume space up to temperature before dropping back to low speed then you will use considerably more power
Up to a point, but a small boat in England, I think we will be at least cracking the hatch open a bit, if not sometimes running it flat out with the washboards out to drive out some damp.

Thanks everyone for the information, looking back on my notes from last year, I was probably either starting with a 'not fully charged' battery, or I need a new house battery.
 

geem

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Up to a point, but a small boat in England, I think we will be at least cracking the hatch open a bit, if not sometimes running it flat out with the washboards out to drive out some damp.

Thanks everyone for the information, looking back on my notes from last year, I was probably either starting with a 'not fully charged' battery, or I need a new house battery.
What's a definition of small boat? Average size in the Caribbean is about 45ft. 'Small' isnt an SI unit😄
 

lustyd

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I have always left the programmer on. Didn't realise it has much of a drain on supply. Excellent item but needs a main switch.
It's not supposed to have a main switch as that risks someone unwittingly switching it off before the cooldown sequence is done which best case might damage the unit and worst case could cause a fire.
 
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