Just wonder how many people that live in the north with below freezing winter have had issues with provents (or other ccv mods) freezing/clogging?

Also if anyone has a clean tailgate or rear door near lower Michigan or northern Ohio I will buy it!

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-05 Dark Khaki Limited CRD. GDE ECO tune. In-tank lift pump, Transgo doo doo kit, B&M trans cooler, replaced trans solenoid pack and filters, Newer Michelin tires, Timing belt with all related parts replaced at 110,000miles.

No problem with either one here. I've driven on the interstate in -11F with the EHM without a problem.

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05CRD: GDE Hot ECU & TCM tunes, Provent, Cat filter, Facet lift pump, TransGo kit, Florida TC, Samcos, stainless brake lines, HDS thermostat, Renegade light bar,
Bilstein adjustables, Al's Gen 4.5 Arms, 235/85-16 Duratracs, DTT rear, Elocker front, EVIC+TPMS, Turbo timer, McNally pillar gauges, Weeks Stage II kit.

It happened to me two winters in a row and is now sitting on the shelf again and will stay off this time. I had it mounted by the firewall on the passenger side with short neat plumbing.
Twice it belched oil all over the area when the pressure relief opened up.
I looked at it last winter and the filter media was clogged with a thick black sludge.
I should note most of my driving is short trips at low speeds.

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Atlantic Blue 06 CRD Limited (his)
Joined by a 2000 XJ Classic (hers)

I disconnected my homemade Provent last winter, but will leave the new one on this year. I use steel braided hoses connected to the catch bottle secured against the radiator. There should be enough heat to avoid frosting. I only need to add a relief valve, which will make me feel more secure, just in case...

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RIP 10/31/2012
Green Metallic 2006 CRD Limited
GDE Hot tune ~ Pre-F37 TCM ~ Transgo shift kit ~ MagnaFlow ~ Homemade Provent ~ OME 2" lift & Airlift ~ Samco ~ Euro TC ~ Lift pump ~ Nylon fan blade & Hayden clutch ~ Etc!

Instead of using a filter media like the Provent, my oil separator uses coarse steel wool, the old tried and true technology that works. I mounted it along the right radiator tank, ran 3/4" hydraulic return line hoses, and plumbed in a 3/8" drain line back into the sump so I did not need to drain it every oil change. With -15F last winter, I did not have freeze ups. In addition to the local errands, I make 42 mile each way trips to Chicago Midway airport and/or drive to projects too close to fly to.
So, I do a bunch of warmed up highway driving less prone to freeze ups.

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2006 Pearl Green CRD
Magnaflow 2 1/2" Cat Back
KJ Extra Leg Room Brackets, Carter Lift Pump, V6 Airbox, ORM
Fuel cooler, Oil Separator, Progard 7
Gauges EGT Boost Trans Temp Oil Pres, Michelin LXT AT2 245 70 R16
7,000# Draw Tight hitch, PML EX Deep Trans Pan
Centrifuge, SunCoast, Transgo, RAM TCM, InMotion Stage 2
Wife's 99 TDI VW Beetle

No issues with the Provent here in the land of cryogenics for the living.

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05 KJ CRD Limited..
08 WK CRD Laredo
03 DR 2500 Cummins
13 Edge Limited AWD

I don't think temperature alone is the cause for Provents plugging up
I suspect it's caused by high humidity and LOW not necessarly freezing temperatures. That's when it happens for me.
When mine starts venting it's full of sludge and is not frozen
My garage never gets below 40f where the CRD is kept so it should not be subject to freezing.
It it were kept warm I'm sure it would work fine

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Atlantic Blue 06 CRD Limited (his)
Joined by a 2000 XJ Classic (hers)