Instruction: Analyze a question and its supporting document. Predicting answerability based on the information provided in the document. Output yes if the document contains relevant information to answer the question, otherwise output no.

Input:
Question: Can this unit be mounted outside the house, such as a garage or shed?
Document: Outstanding product for the money. I had to buy SS pipe to vent to the outside of house which actually ended up costing more than the unit. The install was very easy and the water/gas lines very easy to install. The nice feature of this unit is that NO power is needed- it uses batteries. Once hooked up, the temp and volume are easily adjusted and it enables hot water very very quickly. It gets to temp in about 5-6 seconds. I was actually surprised that the vent pipe did not get hotter- the unit seems to be more efficient than expected.
This was my second unit after the first one had a water line rupture inside the unit and destroyed our laundry room floor 9 months after buying it. The company has almost no customer service and the only response is typically that they don't cover that if they answer at all. My father in law is a plumber and installed ours and I should have listened to his warning to buy a Bosch. I figured I would save the money and go this route. The second unit was purchased as I was told the water line likely froze and rupture even though the unit is in the house and we did not ever get below freezing inside.
We do not have a dishwasher and we only have one person at a time bathing so it works for us. I can only guess that when the shower head is turned on then the heater thinks the water was turned off and it shuts off too. We also only have one of those shower heads that screws onto the faucet, so that might be the problem, not enough water pressure comes out to set off the heater. And the price is so low compared to other units. If you don't have a lot of demand for hot water in your house all at once, this is the heater for you.
We purchased this to replace a worn out hot water heater. This was for a 95 year old lady in the middle of the desert. She lives alone. It was easy to replace the old gas heater with this one except for adapting the outside venting from 4 inch to 3 inch. We could not find it but did finally find on Amazon with exhaust for a car the right one to work. She has endless hot water and has learned not to mix it with the cold. When you turn on the cold with the hot water it stops heating it.
So I love this thing. Hot water right away, super hot and never ending. It works perfectly everywhere in the house, except for in the shower. I don't know if it going through the shower hose does something to the heat, but it works great for about 3 minutes and then it gets really hot and then gets cold and then you have to turn it off and on a couple times before it is hot again and then the same thing happens. I take much shorter showers these days. Otherwise, I consider this a great purchase and it works great for our 3 person household.
After buying the unit, I found out that the vent pipe will cost more than the heater. Consider a condensing water heater instead (they are also more efficient.
We love our new water heater. We moved to a studio and space is very limited so this unit is perfect. The 3 settings make it possible to adjust the water temperature and flow. We have hot water in a matter of seconds. I do agree that the packaging needs to improve and hopefully the manufacturer will do something about that. The product so far works great!
So it's not the perfect long term choice. My Rheem unit has consistent temps regardless of demand and duration or type of use. But since the Marey is a backup and way cheaper than any other heater around, I'd say it's an excellent buy. It produces hot water and that's all I need. It just takes a bit of adjusting to get it acceptable.
I bought the second unit through Amazon as it was cheaper with free shipping. I have had this unit just over 1 year and it stopped working this weekend in the middle of my wife's shower. Figured our propane tank probably went out but we were at 85%. Checked the gas to the unit and it was coming out no problem. Water lines were good and water was flowing no problem. Took it apart and found that the regulator inside the unit was no longer working to allow the propane to reach the spark.
I bought this as a backup for my more expensive Rheem unit that is currently not working. This unit does not have an automatic thermostat so the water temps vary depending on how much demand there is. Also the temps tend to rise significantly after a few minutes of use. Sometimes the heater will quit sensing that water is flowing and will shut off in the middle of a shower- annoying. There are controls for flame, temperature, and water flow- these all need tweaking to produce suitable results. However, the ideal settings are different for a shower vs a faucet.
Answer: yes