| Author |
Message |
Emery Leraand (205.206.221.10)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, October 10, 2002 - 11:08 pm: | |
Have a line on a model DBW2010 Webasto with 45,000 BTU output. Is this adequate for heating a 35 ft. coach (well insulated). Lots of talk on the board about these units but I don't ever recall seeing a model number for the popular ones.
Emery MCI 96 |
FAST FRED (63.215.234.50)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Friday, October 11, 2002 - 4:50 am: | |
We have a 40,000BTU propane/air unit and stock insulation.4106 Coach
No problems down to 10- 15F above , the unit cycles and rests .(Haven't been in colder)
The Mfg usually take considerable leaps from reality and most BTU is INPUT (how much fuel gets consumed per hour) rather than output, into a room.
As with Air Cond , the biggest heat transfer is all the glass , at an R value of .75 ( or 1.5 for dual pane) so your "heating the Universe" (as my dad used to say when I left a door open).
Solution is "warm shades" works to bring the R value to 5 or 6 or 7 , depending on brand and instalation .
IF you have an air unit the instalation is much easier than the water units.
The water units can , can be lots quieter , but usually draw current for toe kick heaters ect .
So the quiet can come at the cost of many amps.
Baseboard is dead quiet ,and very inexpensive , but a bigger pain to install.
FAST FRED |
Geoff (64.1.0.49)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Friday, October 11, 2002 - 8:09 am: | |
The DBW 2010 @ 45,000 btu's is the standard unit used in bus conversions and Aqua Hot systems. I have the "Scholastic" model DBW 2010 in my RTS along with three floor heaters and a heat exchange water heater. The Webastos are a real nice unit-- stay away from "government surplus heaters"-- they are nothing but trouble!
--Geoff
'82 RTS CA |
joe shelton (Littlewind) (67.242.199.49)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Friday, October 11, 2002 - 8:32 am: | |
I have a 2020 @ 80,000 btu's. Pre-heats engine, hot water, and heats coach (big time). It works great though I have had some miantenance issues over the past 6 months (7 years old). Vehicle Systems Tech support told me the 2020 was what they recomended for bus's. But I think if you have a good price on a 2010 I'd get it. 45,000 btu sounds like enuf. I have a good schematic for installation if you want a copy. Joe 4106-2119 |
Jim Ashworth (Jimnh) (172.128.70.47)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Friday, October 11, 2002 - 9:37 am: | |
For a bus with factory insulation with some windows removed or covered, a reasonable estimate is 400 BTU's per degree rise. If you have to raise the temp from 10 below outside to 70 degrees inside then its: 400BTU x 80rise = 32000 BTU's. The extra BTU capacity from the DBW2010 is for getting the bus warmed up quickly from a cold start and to recover quickly after the door is opened. I have used my MC-8 with factory fiberglass insulation and Penninsula windows at -17 degrees and the Aqua-Hot kept the interior at 70. It didn't cycle much. Ran just about full time. But it worked!
Baseboard is THE way to go with hydronic heat. Run it on every exposed wall, even behind the couch. Where there is insufficient wall area, use toe-space heaters to supplement. You can have more than the 40,000 BTU in heat exchangers if you have more than one zone since they won't always be on at the same time. If you have only one zone, the toe-space blowers can each be on their own snap-disc thermostat attached to the piping measuring the temperature of the water. If the temp drops below 150-160 or so, the blower motor shuts down until the water temp recovers. Doing this also prevents the toe-space heaters from blowing cold air.
The little circulator that the Webasto comes with is not suitable for long runs of plumbing and should be upgraded to a March 809 circulator (www.marchpumps.com) rated either 3.1 GPM for a two zone system or the 809HS rated at 5.3 GPM for a single zone system. These are not cheap at $239 each but I have never had a failure or a leak in 11 years of use. Like the Energizer bunny, they keep running...
Jim |
woody48348 (66.82.48.141)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Friday, October 11, 2002 - 10:49 am: | |
The website Jim mentioned is (www.marchpump.com). Thank you Jim. |
carl MCI 9 (66.144.52.102)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Friday, October 11, 2002 - 11:33 am: | |
Joe:
I to have a 2020 webasto to install.
any information you can forward would help.
thanks
carl
MCI 9 |
Emery Leraand (205.206.221.10)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Friday, October 11, 2002 - 11:48 am: | |
Thanks for all the replies, will move ahead on getting the unit. If anyone is looking, several 12 volt units (truck take outs) are available in Calgary, Canada at Canadian dollar prices (read cheap if your south of the 49th! E-mail me if you want the source
Emery
MCI 96 |
clottjr (207.69.9.214)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Friday, October 11, 2002 - 2:38 pm: | |
Funny Geoff should mention the govt surplus heaters....My MC8 came to me with 2 brand new diesel fired "personell Heaters" I drug one box out and took out the "heater", looks kinda like a
small kerosene blower type., probably 24" long.
Odd, though, the box it came in is huge, (only one will fit in a storage bay)and is full of indivudally wrapped componets. The heater part I mentioned probably weighs 10 to 15 lbs and the box and all probably 200lbs.
I don't know anything about these(Obviously)
Is this something that I should try to use or just "trouble" as Geoff mentioned?
( PS I already have enough trouble) |
Jojo Colina (Du1jec) (68.8.173.2)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Friday, October 11, 2002 - 7:03 pm: | |
If you have the Southwind surplus heaters there is an outfit called Aircraft Heating in Redding, CA that knows all about these heaters and recondition them. Their number is 800-409-4328. Ask for Raymond.
These heaters or variations of them are used in aircraft. They have the spare parts and control units for these southwind heaters. |
Bob Gallo (65.64.102.3)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, October 13, 2002 - 9:37 pm: | |
I have a 4106 w/2010. Have factory fiberglass insulation and Hehr single pane windows w/insulating shades. I've been comfortable down to 5 heating the block at the same time. |