| Author |
Message |
FAST FRED
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, March 26, 2006 - 5:38 am: | |
Ran across an add in FMCA for one of these , and am wondering ?
This unit has a 250gal cap , , so if we assume it holds 200 of water,
the question is how many hours would it take to heat 200G with the 1000W heater supplied?
Could be fun in the back of our boat , if it didn't take all week to warm up water say 50deg F.
Line Products Spa-2-Go:
Portable, inflatable spa
Seats four adults
Simple and fast to set up
Inflates using spa's motor
Goes anywhere
Plugs into standard 120v household outlet
No special plumbing or wiring needed
Digital temperature control
Micro air-jets provide relaxing massage
1000-watt heater
Tough K80 vinyl
250 gallon capacity
Outside diameter 82"
Inner diameter 58"
Height: 28"
Filtration system
Insulair thermal cover included
One-Year limited warranty
Model #stg1
Online only
Anuone ever SEEN one and care to comment on Quality?
FAST FRED |
bruce knee (Bruceknee)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, March 26, 2006 - 6:49 am: | |
Not speaking from experience, just an educated guess... with a 1000 watt heater, it will take overnight to heat up. the heater will not work while the blower is running, it has a large blower and a very small circulating pump. The air bubbles will cool down the water temp in 20 min. or so and it will take a long time to come back up to temp.
Incorporate the webasto in to the loop.....
Walmart. com has them, easy enough to try it and return it. Let me know if I'm wrong. Wow, I don't usually sound so negative about things |
Sean Welsh (Sean)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, March 26, 2006 - 10:51 am: | |
It takes about 24 hours to heat up. Also, bear in mind that four persons is a real stretch in one of these.
If you have a hydronic system on your boat (e.g. Webasto), get a Yachtub:
http://www.yachtub.com/
We have the four-person RV version, and it heats 300 gallons of water from ~65 to ~102 in about three and a half hours. (That's with our Webasto DBW2010, which is rated at 45,000btu -- if you have an 80,000btu DBW2020 you will see faster results.)
It's a good deal more expensive, but, as they say, you get what you pay for. We are very happy with ours, and I know a number of people on this forum have seen us splashing around in it at Bussin' 2005, Bus'n'USA last year, or the Minot FMCA convention.
(Full Disclosure: I have no financial interest in Yacht Products, however, I am an authorized dealer. Also, I'm the one that prodded them into making an RV version.)
-Sean
http://OurOdyssey.US |
R.J.(Bob) Evans (Bobofthenorth)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, March 26, 2006 - 10:54 am: | |
We saw one set up at the RV show at Q last winter. I remember that I was underwhelmed but I am struggling to remember why. It didn't look like very heavy plastic - I remember that much. |
Dale Fleener (Dale_mc8)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, March 26, 2006 - 11:59 am: | |
IIRC, there was an article in BCM about these very units a couple years ago. That's all I remember, just that it was there and not the conclusions reached. FWIW
Dale |
Jim Stewart (H3jim)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, March 26, 2006 - 9:14 pm: | |
You can use the constants here to do your own calculating.
I am building a trailer with a 500 gal jacuzzi on it to take out to the desert, and for other occasions. I was doing some calculations on heater size and how long it will take to heat the water, although I am using BTU's. I'm not sure what size the equivalent wattage would be for an electric heater, but a lot bigger than 1000 watts I'm sure. Yes I know how much 500 gallons weighs, and the trailer is sized appropriately.
A 50,000 btu heater will heat 500 gallons of water 10 degrees F in one hour. The spa is 500 gals. So if the water is air temp, say 50 degrees, and we want it around 104, it would take a 50,000 btu heater just over 5 hours to heat it up. I will also have to be running my generator to power the pumps for that entire period too.
I ended up with a 400,000 pool heater, re-jetted for propane. so I can theoretically heat it in about 40 minutes.
Interestingly, one gallon of propane has 91,502 BTU's in it. Heaters typically run 80% or so efficiency. So each gallon will provide about 73,201 btu of available heat. If we need to heat 500 gals for a 50 degree temp rise, we need 3.41 gallons to do it, in a perfect world, just to heat that puppy up one time. More if the water is 40 degrees, or if the heater is old and/ or not as efficient.
The webasto I think is the best idea for the portable spa type, ALA the way Sean has done it.
One its up to temp, I'll just use the 50 amp cord plugged into my generator to maintain the heat and run the pumps. |
tony mci-3
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, March 26, 2006 - 10:36 pm: | |
i have one of these spa to go units.they are great.it takes about two days to reach 104'f.when you turn the blower on the water cools quite fast.there service realy sucks if you have a problem.to speed up heating i use my turkey frier burner with a large pot,can heat to 104 in about 1 hour |
FAST FRED
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, March 27, 2006 - 6:09 am: | |
Well so much for that idea ,
Unless I install a heat exchanger and run the water thru a loop heated by Mr. DD.
Then there will sure be hot water!
Thanks Guys.
FAST FRED |
Gary Stadler (Boogiethecat)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, March 27, 2006 - 7:05 am: | |
Guys try running your hot tubs at exactly 100.
Yes it sounds cold but you'll find that you can sit in them all night and not get overheated. Real fun... |
Tom Caffrey (Pvcces)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, April 10, 2006 - 7:56 pm: | |
Jim, if you use your generator to keep your pool warm, you will only be getting about 1/3 of the BTU in the fuel to heat your pool.
If you have a water cooled generator and can transfer most of the heat from the generator cooling system to the pool, you will get double the heating for a given amount of fuel.
If you just burn the fuel to heat the water, you can come close to tripling the heating for a given amount of fuel.
If the generator is not doing much work, there wouldn't be much heat available, but if you turn on a big heating load, then there will be a lot of heat available from the cooling system, just when you need it.
For what it's worth.
Tom Caffrey PD4106-2576
Suncatcher
Ketchikan, Alaska |
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