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2026 Alliance Delta 321BH Heat Flow Inconsistencies

Frams24

New member
New Alliance Delta owner here. I am wondering if anyone else is experiencing the same issue. When heat is on, the master bedroom has an incredible amount of heat (air) flow, while the main living space and bunkhouse have very little flow. This makes sense given the furnace sits in an adjacent wall to the bedroom closet. The master bedroom ends up incredibly warm, while the rest of the space doesn't get above 65 degrees. I looked at the duct work connected to the furnace and the seals look good. The duct work for the main and bunkhouses are smaller in diameter, I am thinking this is by design to increase pressure flow. Any suggestions here? Appreciate it!
 

Frams24

New member
Follow up - Just watched the Alliance Academy training on the furnace. This looks to be a inherent issue due to the length of the trailer. Would still like to hear everyone's thoughts. Thanks!
 

George

Prominent Member
Welcome to the Alliance forum.
We use a small 12" fan at the end opposite the bedroom on the floor blowing upwards at about a 45º angle. It keeps the warm air circulated. If you have a ceiling fan that'd work too.
We seldom use the propane furnace but use a space heater set to ~65º on the low, 900 watt, setting. I'm scared of using a full 1500W on a 15A circuit all night.
The propane we set to come on at 60º for the occasional frosty nights.
 

BryanValRox

Elite Member
Congratulations on your purchase and welcome to the forum.

I have a couple of thoughts on your heating issue.
1. Inspect all of your duct work, unhook any hose connected to any enclosed/ hidden ducts and get a scope or camera down there to ensure it isn’t restricted or collapsed.
2. Take a look at the furnace installation instructions , specifically look at the duct outlet combinations.
They call out certain combinations of the multiple outlets available based on ducts in use etc.
My take is that they are recommending the choice of outlet based on air and temp known to flow from each during development. Point being, you might be able to optimized some temp and air flows by reviewing the ports that were used by the factory if they were not in-line with the installation manual.
The other suggestion would be to install a dampener in the duct work or outlet that would reduce air flow from one and force to another.
 

Frams24

New member
Welcome to the Alliance forum.
We use a small 12" fan at the end opposite the bedroom on the floor blowing upwards at about a 45º angle. It keeps the warm air circulated. If you have a ceiling fan that'd work too.
We seldom use the propane furnace but use a space heater set to ~65º on the low, 900 watt, setting. I'm scared of using a full 1500W on a 15A circuit all night.
The propane we set to come on at 60º for the occasional frosty nights.
Thank you! Appreciate the help!
 

Frams24

New member
Congratulations on your purchase and welcome to the forum.

I have a couple of thoughts on your heating issue.
1. Inspect all of your duct work, unhook any hose connected to any enclosed/ hidden ducts and get a scope or camera down there to ensure it isn’t restricted or collapsed.
2. Take a look at the furnace installation instructions , specifically look at the duct outlet combinations.
They call out certain combinations of the multiple outlets available based on ducts in use etc.
My take is that they are recommending the choice of outlet based on air and temp known to flow from each during development. Point being, you might be able to optimized some temp and air flows by reviewing the ports that were used by the factory if they were not in-line with the installation manual.
The other suggestion would be to install a dampener in the duct work or outlet that would reduce air flow from one and force to another.
Thank you, will definitely follow the advice!
 

Fishfnatic

Well-known member
If you have the electric fireplace in living room. I have been using ours at night so that heat doesn’t come on as much, usually around a 4 degree difference, does not use as much propane.
 

JeffS

Member
I added an adjustable vent in the bedroom to limit the air that comes out there. Doesn't fix the issue but slow how hot it gets it in there. I mainly used 2 oil heaters, one in the bunk room and the other in the main area set on low power to keep it warm.
 
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