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Open Roads Forum  >  Class C Motorhomes  >  Class C

 > Protection from freezing

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Phedley

Texas

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Posted: 10/22/21 07:33pm Link  |  Quote  |  Print  |  Notify Moderator

I have a 2006 Winnebago Navion, I was wanting to travel Williams Arizona in December. My question is if I keep the inside warm and the holding tanks heaters on would my plumbing freeze? What are your thoughts?

* This post was edited 10/23/21 10:34am by Phedley *

Dutch_12078

Winters south, summers north

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Posted: 10/22/21 07:37pm Link  |  Quote  |  Print  |  Notify Moderator

Where are you driving from and what are the lowest temps you expect to encounter? Our Class A has managed ok in temps as low as -4 deg.F heading south in January.


Dutch
2001 GBM Landau 34' Class A
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time2roll

Southern California

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Posted: 10/22/21 07:52pm Link  |  Quote  |  Print  |  Notify Moderator

How cold is cold? Should be good to 25f while in use.


2001 F150 SuperCrew
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pianotuna

Regina, SK, Canada

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Posted: 10/22/21 08:28pm Link  |  Quote  |  Print  |  Notify Moderator

Hi,

I initially had freeze up problems because the furnace would not run in my class C when I was driving. I solved that by adding a twin window fan to replace the cold air return grill. The fans draw a scant 27 watts (they are 110 volt). I do have them on a mechanical thermostat.

A side issue is the fridge--I use a thermocube and a 60 watt bulb.


Regards, Don
My ride is a 28 foot Class C, 256 watts solar, soon to have SiO2 batteries, 3000 watt Magnum hybrid inverter, Sola Basic Autoformer, Microair Easy Start.

MDKMDK

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Posted: 10/22/21 09:42pm Link  |  Quote  |  Print  |  Notify Moderator

Phedley wrote:

I have a 2006 Winnebago Avion, I was wanting to travel Williams Arizona in December. My question is if I keep the inside warm and the holding tanks heaters on would my plumbing freeze? What are your thoughts?


Assume you have a Navion, not an Avion?
Texas to Arizona in December? You should be fine, just run the furnace as required to keep the interior warm overnight, if the outside temperature dips below freezing.
As far as the tank heaters, mine are DC powered, so unless you have a huge battery bank, I would avoid using them, unless you also run your generator or are plugged in to shore power, overnight. They'll suck your batteries dry in a few hours if yours are like mine.


Mike. Comments are anecdotal or personal opinions, and worth what you paid for them.
2018 (2017 Sprinter Cab Chassis) Navion24V + 2016 Wrangler JKU (sold @ ????)
2016 Sunstar 26HE, V10, 3V, 6 Speed (sold @ 4600 miles)
2002 Roadtrek C190P (sold @ 315,000kms)

Phedley

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Posted: 10/22/21 10:25pm Link  |  Quote  |  Print  |  Notify Moderator

We just bought this unit so there’s going to be a learning curve. That’s what I thought but I wanted to get more input. We will be plugging in but sure if holding tank heater will work. Thank You

MDKMDK

Lockdown Gulag

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Posted: 10/23/21 09:51am Link  |  Quote  |  Print  |  Notify Moderator

Phedley wrote:

We just bought this unit so there’s going to be a learning curve. That’s what I thought but I wanted to get more input. We will be plugging in but sure if holding tank heater will work. Thank You


The tank heaters will work fine as a safeguard, but they need a little DC "electrical boost". One of the weaknesses of the average class C is the tanks are usually exposed underneath the coach. As such, cold temps may affect them negatively. No definitive answer there, it depends on a few other factors, too.

bobndot

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Posted: 10/23/21 11:38am Link  |  Quote  |  Print  |  Notify Moderator

My tank heaters run off 110v. Do all Navions run off 12v ?

Also carry a hair dryer to use in cold temps. Sometimes dump valves freeze .

MDKMDK

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Posted: 10/23/21 11:48am Link  |  Quote  |  Print  |  Notify Moderator

bobndot wrote:

My tank heaters run off 110v. Do all Navions run off 12v ?

Also carry a hair dryer to use in cold temps. Sometimes dump valves freeze .


Mine are DC only, with AC support/replenishment. Manual (Plumbing Section 7-14) states don't use them unless you're plugged in to shore/generator, or running the chassis engine while driving, or they'll deplete the batteries very quickly. I've got lithium, so I might get away with a bit longer standalone run time, but I'm not likely to test that theory any time soon.
If you've got tank heaters, they'll keep the dump valves operational, if the liquids behind them are warmed. Keeping the water heater "on" also helps prevent freezing of some of the adjacent lines/plumbing. I haven't got enough hair left to warrant carrying a blow dryer. [emoticon]

pianotuna

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Posted: 10/23/21 01:25pm Link  |  Quote  |  Print  |  Notify Moderator

MDKMDK,

Any idea of the watts they draw?

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