Dec-15-2016 09:43 AM
Dec-18-2016 04:04 PM
time2roll wrote:
I just want to warm some coolant and move the waste heat to the battery.
Have to modify the connecting tailpiece to have some coolant absorb the heat and then pump to the battery.
Dec-18-2016 03:00 PM
Dec-18-2016 02:10 PM
ktmrfs wrote:
I agree with Dusty. The other thing to think about is how often or long the typical RV furnace is run. We travel a lot, 3 months/year is common. I doubt I use more than $50 of propane each year for heat. Increasing the efficiency of an RV furnace from 60 percent to 90 percent wouldn't make much of a dent in my propane cost, so the extra cost of the furnace would need to be minimal.
In reality I would easily pay more for a quieter furnace, way more likely to do that than pay more for a higher efficiency furnace.
Dec-18-2016 10:12 AM
Dec-18-2016 08:30 AM
dougrainer wrote:Dusty R wrote:
I believe that RV furnaces could be made more efficient and not cost a lot more to manufacture.
I'm an old school part time furnace guy.
Haven't done much furnace work in the past 15 years.
Dusty
Whenever I see someone post something like this, I wonder. WHY do you not do that. You will be a millionaire in no time. There is a BIG difference between the design of a RV furnace and a HOME furnace. There are space considerations you have in an RV that you do not usually have in a Home system. Doug
Dec-18-2016 07:24 AM
Dusty R wrote:dougrainer wrote:Dusty R wrote:
I believe that RV furnaces could be made more efficient and not cost a lot more to manufacture.
I'm an old school part time furnace guy.
Haven't done much furnace work in the past 15 years.
Dusty
Whenever I see someone post something like this, I wonder. WHY do you not do that. You will be a millionaire in no time. There is a BIG difference between the design of a RV furnace and a HOME furnace. There are space considerations you have in an RV that you do not usually have in a Home system. Doug
I under stand what you are saying, but the majority of owner's only look at the cost of things, not at how much it cost to operate.
Williamson furnaces were one of the best and efficient home furnace. Many home owners recognized that and used them even though they cost more. But Williamson went belly up.
The reason that we have the high efficient home furnace today is because our government demanded it.
I'm not an engineer, and I'm not sure about all the safety requirements, and I'm not sure I could find all the parts I would need.
I have many other things to do, but if I had a good working RV furnace to play with perhaps I would give it a try.
But would it sell well enough to produce? I doubt it sell well, as it would cost more.
Dusty
Dec-18-2016 04:02 AM
dougrainer wrote:Dusty R wrote:
I believe that RV furnaces could be made more efficient and not cost a lot more to manufacture.
I'm an old school part time furnace guy.
Haven't done much furnace work in the past 15 years.
Dusty
Whenever I see someone post something like this, I wonder. WHY do you not do that. You will be a millionaire in no time. There is a BIG difference between the design of a RV furnace and a HOME furnace. There are space considerations you have in an RV that you do not usually have in a Home system. Doug
Dec-17-2016 05:55 PM
Sam Spade wrote:ktmrfs wrote:
my sticks and bricks 15 year old gas furnace has a blower for the combustion air on the flue exhaust side. In fact, likely on almost any gas furnace anymore.
I'm sorry, I forgot about "high efficiency" gas furnaces, which have PVC plastic "chimneys" because the exhaust temperature is so low.
I have no information on whether or not that applies to "almost all" of them these days though.
And I had no idea that a "low end" trailer or RV would have that kind of arrangement. I stand corrected.
(I still haven't looked at mine.)
Dec-17-2016 02:54 PM
Dec-17-2016 02:52 PM
Dusty R wrote:
I believe that RV furnaces could be made more efficient and not cost a lot more to manufacture.
I'm an old school part time furnace guy.
Haven't done much furnace work in the past 15 years.
Dusty
Dec-17-2016 02:15 PM
Dec-17-2016 01:05 PM
Dec-17-2016 06:28 AM
JaxDad wrote:
Gravity? I suspect you meant to say convection.
Dec-16-2016 07:08 PM
JaxDad wrote:Sam Spade wrote:
I've dealt with a LOT of gas furnaces over the years, both in permanent structures and house trailers and have NEVER seen one where the combustion air was not gravity fed.
Maybe I will learn something new today. 🙂
Gravity? I suspect you meant to say convection.
Either way, I'm not sure how well a foot tall mostly horizontal furnace would vent when the intake and exhaust are at basically the same height.
There kind of needs to be some appreciable height for the hot air to rise to create enough vacuum / air flow for cold air to be drawn in. If the 'intake' and 'exhaust' were at the same height the heat would just spread equally between them, assuming both ports were equal size.