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: Will you please list EVERYTHING you will need to install this unit?
Document: install was fairly painless as far as the unit goes. I chose this as the time to learn to solder plumbing so that stretched things out. I move my water lines and got a bigger gas line to replace the one going to the old hot water heater.I ran it for 2 days with no vent on it. I just kept the back door open so no chance of carbon monoxide poison. I wouldn't recommend doing this but I'm OUTRAGEOUS! !Unit worked fine. washed a few loads of clothes. dishwasher and a couple showers.
I am servicing one office bathroom (sink and shower) with this unit.
This is one of the best. I have installed and used Rheem before but this unit is much better. Installs easil with the recommended vent kit and gives unlimited hot water to a small unit.
No problems. I wish it would get 10 degrees hotter. 120 is not quite good enough. I guess there's an Addon to make it go to 140 which would be nice. sucks you have to pay more for it.!!!!!!! IMPORTANT  !!!!! !It doesn't come with a vent kit  And the instructions all refer to their vent setup.Here's the important thing!! Its a  direct vent unit. Not knowing what that meant I connected a 5&#34; vent to the unit.
But in the middle of the night I have an epiphany. The 5inch vent pipe coming out of the top of the unit has a smaller 3 inch pipe inside.Its the 3inch inside pipe that is a vent. The outside is actually the fresh air return.See new houses are well sealed and if the unit didn't have its own fresh air return it would create a vacuum in the house and not work.Sooo. I ran a 3&#34; pie from just the exhaust of the tank and left the fresh air open to pull from inside the house.
This tankless water heater works super. It is in close proximity to the appliances using it and is very efficient. It kicks on with even a trickle flow and water is hot within a few seconds and stays hot. Very pleased with this natural gas unit. It does require special venting and placement near an outside wall for the venting. One button turn off or on for vacationing or long periods without use. Push the button to turn on after vacationing and you have hot water within seconds. Regular water heaters will take 30 minutes to an hour depending on the size to get that first hot water after a vacation.
I bought this unit to replace a 7 year old model from another company. With the prior unit, it would take over a minute for hot water to arrive to the showers or sinks. From other reviews and my own experience, I thought the one minute delay was just something to live with, but no! With this one, it's almost instantaneous. The old one had a catastrophic failure on Christmas Eve; except for the inconvenience, I'm glad the old one broke. Note to all with hard water:  make sure you use a water softener with this kind of heater.Due to a mix up on my end, I ended up with two water heaters.
We are in an old condo that is far from sealed so no issues with a vacuum.muahhahaha,. working like a champ now.So what was happening was with a 5&#34; pipe around the whole thing it was trying to intake and exhaust through the same pipe. It would blow out the flame because there's not enough oxygen in the exhaust gas. Then the gas would build up and the ignitor would kick in and blow it all up.
It slides right in past the rubber gasket. Perfect fit I think.Turn on the hot water and 20 or 30 seconds later BOOOOM!!! it blows up. Well that was scarey. Panic and look for a fire. shut off the gas. nothing really looks wrong so I try it again. Booom. hmm.I called roto rooter on a sunday before memorial day and a guy comes out and tells me its back-drafting because my gas line is to small.I change to a bigger supply line.Boom....  Glad he didn't charge me for the service call...OK so now im going to call my hvac buddy to come out.
Bought these machine for a new house construction earlier. When project almost done with we ran all equipment including the tankless water heater and everything seems fine. The house was officially completed and my client finally move in to their new home few weeks ago. Heater starts having problem with taking shower and bath. Call Rinnai regional reps, not helpful to resolve our problem.Problem Code: 12Gas pressure to house: 1-1/4&#34; main with 3/4&#34; to machine, pressure tested and reads 0.22 psi (6&#34; WC)Concentric flue: 22'-00&#34; vertical height with 2 x 45 bentWater pressure: 40 psiNeed help
Answer: no