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Old 12-22-2007, 01:27 PM   #15
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I am giving serious consideration to using one of the tankless units by Excel. Check it out at the following website:

(1) GAS Appliances

It looks to me like it could be installed inside - even in a visible location. It is ventless so it would be a good idea to have a seperate carbon monoxide alarm just in case. I am intending to use the unit for hot water as well as to supply hot water for radiant heat tubing in the floor. I see that there are two models that I would have to chose from that I think would be fine. My guess is that the one for $299 would be just fine since I would more than likely have enough battery power for ignition. The $399 marine one sounds intersting though in that it uses water flow to generate electricity for itself. I am not sure that this would be worth the extra $100 though.

Anyway see what you think. I would also be interested to hear from anyone with direct experience with these units.

As a side note I have already covered over the old hole where my original water heater went and you can barely tell that there was an opening there.

Malcolm
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Old 12-22-2007, 01:48 PM   #16
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Mal,

In your quest for a 'cheaper' tankless unit, you have found one that, IMHO, is just that......cheaper than the RV-500. It has NO RATINGS from RVIA, UL, CE, ISO or any other recognized rating body.

Just the works they use like 'remarkable' set off my warning bells. Once again, THIS UNIT IS NOT RATED FOR RV USE, and there is certainly nothing 'remarkable' about using DSI ignition technology that has been around for years! The manufacturers claims that it is a 'marine' unit are just that......no US Coast Guard certification either. What qualifies it for a marine rating....a little stainless steel in the casing? Believe me, if they HAD these ratings, they surely would highlite them on their website.

This is definitely a case of buyer beware. I would not use any LP appliance that does not have some type of rated label affixed to it. And where is this unit manufactured? I'll bet that it begins with C and ends with A!!!

After all, we want you to be around for a while and not have a mis-hap because you installed a unit that was not designed to be used in an RV!
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Old 12-22-2007, 05:52 PM   #17
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Quote:
Originally Posted by malconium
I am giving serious consideration to using one of the tankless units by Excel. Check it out at the following website:
Malcolm
Lewster, What part of your advise are these people missing? Why would anyone want to install a gas fired water heating unit inside a trailer? Then they will want to install a second air conditioner to off set the heat. Yes an electric flash heater would work but one would most likely have to upgrade to a 50 amp service to support it.
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Old 12-22-2007, 08:13 PM   #18
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Quote:
Originally Posted by lewster
And where is this unit manufactured? I'll bet that it begins with C and ends with A!!!
i know... CANADA
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Old 12-22-2007, 08:30 PM   #19
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Quote:
Originally Posted by urbanfood
i know... CANADA
Not exactly what I had in mind.....EH!

OK, starts with 'CH'...and ends with 'A'

Do you know why Canadians are always saying....'EH'?

It's 'caue they spell their country C.....EH....N.....EH....D.....EH
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Old 12-22-2007, 10:12 PM   #20
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Quote:
Originally Posted by Jim Foster

In cold weather it comes on from time to time to keep from freezing. So, you never want to leave it without propane and 12v in cold weather.
How cold can it be before we have to worry about these things?

It's been getting down to 32F here in N. Ca. the past few nights.
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Old 12-22-2007, 10:48 PM   #21
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If it gets near or below freezing the 12v and propane should be left on. I leave mine on while in storage. I don't store in a cold area, but why take a chance with the Precision Temp water heater. I have heard it come on in the middle of the night in Quartzsite, AZ, and also while camped in the Sierras.
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Old 12-26-2007, 08:14 PM   #22
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Lew,

Perhaps you are right about the Excel being a bad choice and it certainly at a minimum bears further investigation. I did find a note that the product is rated by a world wide rating organization (of which I know nothing). The following except lists the certification organization:

Excel water heaters are currently certified by Bureau Veritas ( www.bvqi.com) a structured certification network for more than 178 years with presence in more than 140 countries , a leadership position in the global certification market serving approximately 55,000 clients worldwide .

I think I will see if they can furnish the text of the certification which they claim to have.

Malcolm
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Old 12-26-2007, 09:12 PM   #23
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For those of us with unlimited budgets...

Lew,

In looking again at the Precision Temp website I see that there are some products that are new since the last time I looked. Pretty spendy though! Do you have any experience with the TwinTemp-2 and Junior units? The Junior looks like it could be a pretty nice unit for what I want to do - namely provide domestic hot water and radiant heating (with the exception of the $3250 price tag!).

PrecisionTemp.com: For Recreational Vehicles and Boats

Since my unit is almost entirely a blank slate at this point I could put my water heating unit just about anywhere I want. I see that these two models vent out through the floor and need some external combustion air. I was also interested to note that the heating loops are seperated from the domestic water and are designed to contain coolant.

Malcolm
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Old 12-26-2007, 09:50 PM   #24
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The TT Jr. is a very nice little unit. I have a lot of experience with the Aqua-Hot diesel fired units that the TT was patterned after.

Precision Temp makes a very nice unit and I highly recommend them. They have been very reliable (from my experience in owning 2 and installing 3). If you are looking for one unit that has both domestic hot water AND heating capabilities, then the Twin-Temp Jr. just might be the answer for you.

Let me know if you have any other questions about them.

PS: I have never heard of the 'Bureau Veritas' organization and have never seen a component used in the RV industry that subscribes to them.

PPS: Malcolm, I tried to PM you but you have no space left to accept new massages without clearing the mail box.
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Old 12-27-2007, 11:07 AM   #25
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malcolm,

i think safaritim of the VAP installed the TTjr in his trailer. i thought about it for a moment, but realized the expense just didn't justify the need as i already sunk money into the kodiak brake system, which in my opinion did justify the expense.
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Old 12-30-2007, 11:30 AM   #26
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rv-500

Mr. Lewster,

My rv-500 arrived this week. I purchased directly from Precision Temp, and I have to say I am happy with the service I recieved from Fred, the salesman.

I appreciate your info and input. I agree that one should be extremely careful with propane appliances. The rv-500 was a bit pricey, but I am looking at it as an investment.

I will be working on the install and I will document with pics and share.

Regards,

Reganzo
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