I have bought a 8.5'x16' enclosed trailer with 7.5' interior height. I am insulating all sides with 1" board (R6-value) and 1/2" tongue & groove knotty pine interior walls to give a cabin-type feel (I am using this year round and like the idea of a cozier inside). It has 3 windows. Anyone have a good way of determining the proper size heater? Any recommendations? I currently was looking at a Suburban SF-25FQ or SF-30FQ ducted furnace. Going to install one duct of PVC for boot heaters. Thanks!
Heater Size????
- Thread starter gmac144
- Start date
I have a 6'6" x27' v nose with 6'6" ceiling and a 35,000 btu ducted furnace. It will get from single digits to 70 in about 15-20 minutes.
I have 1.5" foam and I had the floor spray foamed. Insulating underneath makes a huge difference.
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I have 1.5" foam and I had the floor spray foamed. Insulating underneath makes a huge difference.
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volcano buster
Well-known member
Might depend on what the ambient temps would be and how many women want to be comfortable in it when it gets cold.
I was thinking about the spray foam for underneath. That is great info and I appreciate it. In colorado the ambient temp is usually not that bad. Just curious, are there any disadvantages to having too large a furnace? I was thinking the only disadvantage was increasing the inside temp to quickly resulting in greater condensation? Thanks for the replies.
Seems like 35,000 is a popular size.....however it seems like most people using that size have a larger trailer. Again, appreciate the info!
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bthomps33
New member
You can always go with a dual output furnace. They start in high output to get the trailer quickly up to heat. When the temp is close to what is set on the thermostat it runs on low output. You can also manually set what output the furnace runs at. When it's in the low output mode they are quieter and draw less amps.
Suburban and Atwood offer a 40k-25k furnace.
Atwood also offers a 34k- 23k and 22k-15k versions.
Suburban and Atwood offer a 40k-25k furnace.
Atwood also offers a 34k- 23k and 22k-15k versions.
My Mirage has dual heaters.
40k BTU Ducted Forced Air Heater
and
8K BTU Radiant Heater wall mounted in the rear.
When it gets COLD out, I run them both wide open and it can still be "Chilly" down low in the trailer.
40k BTU Ducted Forced Air Heater
and
8K BTU Radiant Heater wall mounted in the rear.
When it gets COLD out, I run them both wide open and it can still be "Chilly" down low in the trailer.
Spray foam your floor and u won't have a cold floor. Best $500 I spent on my trailer.
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bthomps33
New member
Yup, 3/4 inch plywood has an R-value around 1. Spray foam and a small fan to circulate heat will go a long way.
And how has your undercoat foam stood up to road grime over time?
I've spent all day looking into trailer heaters, finally purchased one. This link has the best prices I could find anywhere, Sale ends 10/14/2016:
http://www.pplmotorhomes.com/parts/suburban-rv-furnaces-suburban-atwood-parts.htm
I ended up buying a Suburban NT-40, but I have a larger trailer. I'm still a little confused on the Suburban heaters. It looks like the NT-series has a direct vent to the wall were as the SF-series needs about 9" of wall space for venting.
Does anyone know for sure.
http://www.pplmotorhomes.com/parts/suburban-rv-furnaces-suburban-atwood-parts.htm
I ended up buying a Suburban NT-40, but I have a larger trailer. I'm still a little confused on the Suburban heaters. It looks like the NT-series has a direct vent to the wall were as the SF-series needs about 9" of wall space for venting.
Does anyone know for sure.
This will only be my 3rd season with the trailer. So far there isn't any damage as of now but I only have around 7000 miles on it.
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I have a Suburban SF furnace in my trailer. Furnace is mounted vertically, (to save room), have about inch to inch & half from the interior wall to the back of the furnace.
OK, I've been reading for a couple of hours now. Here is what I found:
Product Dimestions:
SF Series: 7 1/2" H x 17" W x 20" D
NT Series: 12 1/2" H x 12" W x 23" D
The SF Series needs to be serviced from the outside but the SF-FQ Models are designed for interior serviceability with a front (inside) gas connection and only a small vent terminal on the coach exterior, permitting installation up to 9 inches from the wall. Since no exterior access door is required, the SF-F is aesthetically appealing and a more economical installation choice.
The NT Sefies can be mounted flush to the wall and serviced from inside.
***I've attached the installation instructions for both.
Product Dimestions:
SF Series: 7 1/2" H x 17" W x 20" D
NT Series: 12 1/2" H x 12" W x 23" D
The SF Series needs to be serviced from the outside but the SF-FQ Models are designed for interior serviceability with a front (inside) gas connection and only a small vent terminal on the coach exterior, permitting installation up to 9 inches from the wall. Since no exterior access door is required, the SF-F is aesthetically appealing and a more economical installation choice.
The NT Sefies can be mounted flush to the wall and serviced from inside.
***I've attached the installation instructions for both.
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i went this route no battery to deal with
https://www.amazon.com/PROCOM-Blue-Flame-Vent-Heater/dp/B002NVGJO0
will take my 3 place from 10 to 70 in about 10 min.
https://www.amazon.com/PROCOM-Blue-Flame-Vent-Heater/dp/B002NVGJO0
will take my 3 place from 10 to 70 in about 10 min.
I thought about that but I have a few questions. My brother in law had those and they seemed to make ice in the trailer. I've heard this other places also. What has your trailer been like with this.
On the SF model(s) there is the option of an external panel for servicing the unit. From what I've seen the panel also holds the intake and exhaust tubing for the furnace. I can service my furnace from inside my trailer if need be. Like I previously said, mine is mounted vertically against the interior wall and I have 90 degree mandrel bent pipes for the intake and exhaust vents. All that is visible on the outside wall of the trailer is the covering for the vents.
