Heater

Post by **maximus** » 15 Apr 2007, 21:40

anyone got one of these

javascript:popupWindow('http://shop.justkampers.com/popup_image.php/pID/10504')

Oh its the 240 halogen heater form JK 400/800w

Post by **Bowton Lad** » 15 Apr 2007, 21:44

Sorry Maximus owd lad, the link isn't working.

Post by **lambro28** » 15 Apr 2007, 21:45

its here!

http://shop.justkampers.com/popup_image.php/pID/10504

Post by **maximus** » 15 Apr 2007, 21:54

cheers

Post by **lambro28** » 15 Apr 2007, 22:04

Im considering something like this as the propex heaters seem to be being snapped up fast! Bloke I brought my camper from told me he used an oil filled radiator from Argos, which I suppose is similar to this. I have an invertor, and Im going to look into whether that will run one of these heaters for a while.

On the other hand if somebody offers me a reasonably priced propex

Post by **kevtherev** » 15 Apr 2007, 22:30

If you put that heater on an inverter the battery will have to be the size of your van

I have found that over 1kw is just about enough in the winter.

propex or ebber or if you have hooky then get a 2kw fanny

Post by **maximus** » 16 Apr 2007, 05:19

http://cgi.ebay.co.uk/ws/eBayISAPI.dll? ... L:RTQ:UK:1

I wanted this for bus types, but the geezer said I will need 1.2 kva genny to run 800w heater this is only a 0.9

Post by **MINI_BUS** » 16 Apr 2007, 10:26

i brought one of those halgon heaters from wilkos for 8 quid 2 weeks ago

here u go 5 quid now
http://www.wilkoplus.co.uk/webapp/wcs/s ... y_rn=21503

Post by **Swampy** » 16 Apr 2007, 20:05

I got one of those JK Halogen heaters as a cheap emergency job for the Easter camping trip to Cornwall (My Truma Heater packed up).

We used it on mains hookup, I wouldn't be confident that a battery with inverter would last, I'll be honest.

The only place where this thing gets hot is the front - Exactly how it should be! With both bars on I could place my hands comfortably on the top & side of the heater & it was cold. I had no worries about anything catching fire etc, though the wife had her reservations.

There's also a handy cut-out switch at the bottom of the unit. If the heater falls over, the heater switches off. It gets hot & cold very quickly. I suppose all Halogen heaters do.

A handy spot for it was in between the cab seats whilst Charlotte and I were on the back seat. We only actually used it on one bar, as it was enough to heat the Van confortably for us.

Once I've looked at the truma, I'd keep the halogen in case I need an awning heated etc. I thought it good value for what it is. I'd recommed that you only use it with hookup, mind.

Hope this proves of use.

Post by **Other-Power** » 16 Apr 2007, 20:34

Ok here goes how much energy is in a lesuire battery for the idea of running an inverter and a heater of that battery:

ok asumme the following:

heater 800 watt
battery 12volt 110amp hour
inverter 100% efficent

To say the battery will produce 110 amps for a solid hour which they dont and if they did the battery at the end of it will be dead and no good for future use.

Volts x Amps = Watts

12 volts x 110 amps = 1320 watts

1 watt = 1 Joule of energy per secound

1 Joule of energy is the amount of energy needed to lift the temprature of 1ml of water by 1 degree C as a liquid.

1320 watts = 1320 jouls a secound.

1320 x (amount of time in an hour)

1320 x 60 secounds x 60 minutes in an hour

1320 x 3600 secounds

4.8 Mega Jouls of energy in the battery asumming its all used up

4752000 / 800 watts (800 jouls a secound)

= 5940 secounds

5940 / 3600 = 1.65 hour

1.65 x 60 = 99min

99 - 60 = 1.39 hours

so at 800 watts the heater would last 1.39 hours

If my math is right. if not pick me up

Regards Jon

Post by **lambro28** » 16 Apr 2007, 20:54

All very clever Jon, but can you answer this for me?

If I run an invertor to power my car battery charger and with that charge the batter that powers the invertor, how long will I need to keep it on until the battery is fully charged

Post by **Other-Power** » 16 Apr 2007, 21:04

LOL

Boy i wish that worked

Jon

Post by **kevtherev** » 16 Apr 2007, 21:49

http://www.the12volt.com/ohm/page2.asp

put the values in

remember its 12V....not 230v

Post by **Bowton Lad** » 16 Apr 2007, 23:58

kevtherev wrote:http://www.the12volt.com/ohm/page2.asp

put the values in

remember its 12V....not 230v

Good website that Revster!

Is there an equivalent website that has 240 volt tables for use with household electrickery?