Furnace hoses

[boybach]

While installing my new furnace in my 1977 Palm Beach, I ran across 3 different size hoses leading to the old Sol-Aire. There's the "normal" pair of
4" hoses and a 2" line that was connected to the top of the old sol-aire which runs to the back, I presume this is the line to the shower but there is
also this 3-1/2" hose that also runs to the back.
I was going to connect this as an output but now that I think about it, is this the old cold air supply hose?

My new furnace doesn't have a plenum input for cold air, it just sucks in ambient air so if this 3-1/2" hose is a cold air supply I guess I shouldn't
hook it up to the furnace output, right?

Larry
--
Larry - Victoria BC -

1977 Palm Beach 40,000 miles, PO said everything working but forgot the word NOT. New Atwood fridge, water heater & furnace. New SS exhaust system,
6000w Onan, Iota Converter, R134A A/C, New fuel lines & heat exchange hoses

 

[RF_Burns]

Larry,

My '77 xPB has a furnace hose to each of the 4 furnace vents... 2 under the sofa, one under the kitchen cabinets and one under the closet door, plus
the 5th small hose that goes around back and into the bathroom. Are you missing one of the floor vents?

I found that I got very little air flow from the furnace vents. The furnace would run for a long time before the coach would get warm. I checked for
obstructions in the 4 large hoses and found none. I could hear the over-temp sensor click OFF because the heat exchanger would get so hot!

One cold morning I removed the front cover of our Suburban furnace and WOW the amount of heat and air flow that came out was overwhelming! The coach
was toasty warm in minutes much to Paula's delight! The cover is still off till this day. When we use the furnace I just leave the door in front
ajar and when the furnace comes ON it blows the door open.

My plan is to have a small sheet metal plenum made that will go from the front of the furnace to all the vents. My guess is the air turbulence is
causing excessive resistance to air flow through the hoses.

--
Bruce Hislop
ON Canada
77PB, 455 Dick P. rebuilt, DynamicEFI EBL EFI & ESC.1 ton front end
http://www.gmcmhphotos.com/photos/showphoto.php?photo=29001
My Staff says I never listen to them, or something like that

 

[LQQKatJon]

That is what I did with the one for the couch space. It is now a heat duct.

the back rear intake, That is just left open dangling in to allow more intake air into the cabinet.

My palm beach has louvered doors, so that helps with intake air.

--
Jon Roche
75 palm beach
EBL EFI, manny headers, Micro Level, rebuilt most of coach now.
St. Cloud, MN
http://lqqkatjon.blogspot.com/

 

[boybach]

> Larry,
>
> My '77 xPB has a furnace hose to each of the 4 furnace vents... 2 under the sofa, one under the kitchen cabinets and one under the closet door,
> plus the 5th small hose that goes around back and into the bathroom. Are you missing one of the floor vents?

Bruce, My PB has had quite a bit of modification in the living and kitchen area and yes there was a second 4" duct about 3 ft long fitted to the
Sol-Aire that had no connected vent and just ended up somewhere near the stove. I don't see a vent under the kitchen cabinets however I don't think
the cabinets are original. The other one on that side runs back to the under-closet vent. BTW, good news to confirm the 2" hose feeds the bathroom
vent!

Both under couch vents and ducts were missing. The living area was changed to two white leather tub chairs and a matching couch by an earlier
(competent) PO, but a later owner eliminated them when fitting new carpet. The furnace didn't work so maybe they just didn't bother replacing the
ducts and vents. There were ancient electric heaters stashed in the cabinets when I bought her.
I guess I'll have to try and trace the 3-1/2" rear facing duct to see where it originates. I realize now that the duct is the old cold air intake, but
before finding out I assumed it was an output ...so made an adapter to step up to 4" and fitted it to one of the furnace outputs ...

Larry

--
Larry - Victoria BC -

1977 Palm Beach 40,000 miles, PO said everything working but forgot the word NOT. New Atwood fridge, water heater & furnace. New SS exhaust system,
6000w Onan, Iota Converter, R134A A/C, New fuel lines & heat exchange hoses

 

[boybach]

> That is what I did with the one for the couch space. It is now a heat duct.
>
> the back rear intake, That is just left open dangling in to allow more intake air into the cabinet.
>
> My palm beach has louvered doors, so that helps with intake air.

I wish my PB had louvered doors, I guess mine is the chipboard edition.

I'll blank off the 3-1/2" connection and do what you did, leave the duct dangling to help the furnace breathe. I might fit a grille too if I find the
furnace is suffocating.

Larry

--
Larry - Victoria BC -

1977 Palm Beach 40,000 miles, PO said everything working but forgot the word NOT. New Atwood fridge, water heater & furnace. New SS exhaust system,
6000w Onan, Iota Converter, R134A A/C, New fuel lines & heat exchange hoses