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: vent
Document: i was told these were noisy ! not true, can hardly here it run. only runs when you use hot water, not wasting oil heating a tank of water all the time !
You don't need to order the bypass kit. It comes with it. The unit was easy to mount and plumb. It is a smaller unit but it keeps up well with a shower, kitchen sink and a dish washer.
Works great - Easy install - So far , so good (2 months)Don't make us type in extra crap hjust to get enough words!!!!!! !
We run two of these units (one for in-floor heat, the other for home hot water) and have had trouble free service from them for 4 years. Very low energy use, quiet, and reliable. Easy to install, but beware, most plumbers are afraid of them, and charge an arm and a leg to install them. I did it myself - not difficult.
We have had ours now for about 36 months and it works extremely well. There can be a delay in hot water, or a cold water "sandwich" if you change temperature quickly or turn off and then on after having it on for 15 seconds or more. It probably takes 30 seconds for ours to really heat up, and maybe 40 to get hot in the dead of winter...this is slower than a tank heater and the only detriment I can note or am aware of at this point.
We had our whole system installed for 1350 total.....so it cost us about 500 bucks more than a replacement standard tank water heater....I am sure we have gotten this back or will be very close by the end of this year. I believe we have saved 15 bucks per month on average? Make sure your gas pipes have enough flow.....Ive heard this can be an issue also? We really love ours.
We got a plumber who recommended this but wanted $4k to install it including wanting $500 more than the amazon price for the unit. We decided to DIY. The install was easy, we used sharkbite fittings and flexible hose. I think the hardest part was rounding up all the fittings and finding appropriate flexible gas line that was large enough without a step-down. It took my wife and I about 4 hours and it has been problem free ever since.
We bought this product to reduce our energy cost and to get rid of our water heater 10 plus years old. The purchasing went fine but if you're looking to purchase this Rinnai water heater all the water connections come with this unit even the gas shutoff. So don't purchase additional water shutoffs or gas shutoffs. We just finished our service connection by our propane company no leaks and I did the install myself a savings off $2500.
We adjusted our tank to put out 140 degree water and we love it...especially in the winter. My wife used to fill our tub, and the old water heater would actually run out of hot water.....never a problem again! I think beyond 3 uses at one time(shower, laundry, dishwash, etc) running you would have a capacity problem...but how often do you do that?
Unless you are a licensed contractor purchasing this unit for installation, DO NOT BUY IT ONLINE. Rinnai will not support you, basically saying they will only work on problems with a licensed contractor. Even if you purchased it online and had a licensed contractor install it, once the contractor is done and gone, you will not be able to get support from Rinnai. My unit has a defective leaking cold water isolation valve, not part of the unit itself, but a part shipped with the unit.
Answer: no