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: What is the BTU?
Document: Fortunately, my natural gas supply was 1&#34;, and the hot and cold supplies were 3/4&#34;, so all I need to do is adapt. Home depot was the only place in town that had the proper sized gas connector, one with 3/4&#34; fittings and 7/8&#34; OD line, for appliances up to 290,900 BTU (Brasscraft cssb21-24P).
Works flawlessly and was not too difficult to install. Must have basic plumbing skills, otherwise call a plumber. If your using a roof vent and don't have roofing skills then call a roofer. Otherwise it is straight forward. I picked this unit because it had the lowest flow rate required for ignition. It also came standard with a wall mounted remote control that makes changing the temperature settings as easy as changing the room temperature. Also, it had a very competitive price at $750.00.
Why they didn't do that before, nobody had a clue including frustrated me. FINALLY I talked to a representative at Rheem and was going to get somewhere!! I spoke with Wes and he discovered that we had not registered the water heater and took care of that. He gave me the hard earned magical &#34;case number&#34; that CPO required to process the return. Thinking that I was in the home stretch and tasting the end of it all, I immediately called CPO.
We made this purchase for a rental property so, being far from slum lords,  we needed to get hot water going quickly. Thankfully (maybe not because we would have avoided this COSTLY fiasco) our tenants were going to be out of the house for a few days so we had a window of opportunity to work with. We did get the shipment in time and then did the installation. The error message said that it was not receiving enough natural gas.
We THOUGHT we were replacing a tankless heater that would have been a quick swap out baring the gas line diameter issue that really was on our side of the issue. We were left with a tough decision to make and determined that having the plumber install a new tank was the best. The plumber felt so badly for our situation that he gave us a discount.
WE TRIED! I am not a newbie to any form of construction. I grew up with blueprints on my dining room table and owned an electrical company with my ex. I know my limitations and chose not to install the gas line ~ I was hurt and could not be certain of the outcome.
To say the least I am not a happy customer!Part of making contact is having somebody to make contact with right? NOW after all of this I was told that we needed another part to make the unit work. The same error code could have meant that the double walled pipe was not feeding enough air back to the unit. In short they wanted me to purchase ANOTHER product that ONLY they sell and to do it through a chain of ineffective return methods.
They told me that I needed to get a case number from the manufacturer in order to process the return. I called many times but the number to Rheem did not answer but a message said that they were busy and to call another time. I was a bit annoyed but kept trying. After many attempts I called CPO again and they said that this was sometimes a problem but to keep trying. I did that. I still did not get through after about another week!!
The traditional heater wouldn't be any faster. It takes only seconds to get to the washer or the bathroom which are only 4' or 12' of pipe away. I'm not a professional plumber but didn't need to be. It was an easy install for someone with a little do it yourself mentality. The only downside, in my way of thinking, is that when I'm brushing my teeth, shaving, or other instances when I don't let the water run, the unit kicks on and off each time I open the faucet.
The piping configuration is a bit complex, compared to what I'm used to with conventional water heaters. But I just took care to plan for what parts I needed, as well as the recommended service valves; and the pipe connections were fairly easy.What surprises me is how quiet this unit is. We use a tankless in an overseas apartment; and that one is really loud when it starts up. This particular unit you can hardly hear standing right next to it, except for some solenoids clicking and the blower.
Answer: yes