Instruction: Given a question and its related document, determine if the question is answerable by analyzing the information in the document. Output yes if the document addresses the question, or no otherwise.

Input:
Question: color
Document: You will not be sorry if you purchase this heating system. I am very happy with the unit and it was real easy to install with the little knowledge I have. There is a water reservoir enabling you to moisten the air if you choose to. The unit is quiet enough to have conversations around it without raising your voice. It has an economy setting to help keep the cost down which I find I use exclusively. I live in the Pacific Northwest where temps are fairly mild in the winter.
Very nicely made, high quality unit. Installed this in a customers 560 sq ft beach cottage. Installation was a breeze with all components included for direct through the wall installation except flex hose. Full size template on the outside of the carton provides all locations for brackets & flue. Only one 3" hole required for flue installation. An extension kit is required if you have to vent up and out. Nice programable thermostat & electronic ignition.
This is really a great heater. Our space in our finished basement is 1200SF and this thing has no problem keeping the area very very comfortable without even working hard. Frankly it can make to hot if I let my wife and kids have their way. I had a gas line ran for about $150 and I installed the ES38 my self - I had a contractor come and drill out the hole through my foundation for $100 for the flue manifold.
This is our second ES38-N.  We have one on the main floor and this one replaced a Viena Heat-n-Glo. The Viena gas log fireplace was 60% efficient; this one is over 80%. It was a difficult business case but I like the ES38 since it is safer. I was somewhat disappointed on my first ES38 because I got an older model. This one is the latest and has the electronic timer/setback clock.
This is an awesome stove. I do need to bring in a professional to use vacuum guages that will allow me to adjust for my higher elevation. The details are in the install manual.
This heater works like a dream I wish I would have bought it years ago! Heats up the house fast and maintains a constant Temp throughout the house. 5 stars!! !
The installer says most jobs are over $500. I usually like to take that money and spend it on tools but gas is not something I want to work on. I was pleased that Rinnai included venting, valve and street-90 pipe. Installer provided the outside plumbing and a $25 3' inside gas flex pipe. You may not need that depending on the gas service location.I want another for the basement but will wait for the setback/programmable thermostat or simply go for the other lesser BTU models.
The damage to my unit was minor, but could have been prevented had the box been reinforced. I chose to install the Rinnai as it was, because the cold weather had arrived and I didn't want to delay getting it into service.
The ES38N really does a nice job. Quiet, Efficient and elegant looking. This Japanese product deserves a Toyota/Lexus quality rating. I was super disappointed when I did not see the setback thermostat as shown on the web site. I determined that feature was part of the family but not on this model. Very misleading. That is the reason for the low rating.The cost to install was 3.75 hours or $346 (Y2010 Idaho dollars).
My last house was heated by a wood stove, and the Rinnai delivers constant, quiet heat in much the same way.My only complaint is with the shipping- if you do buy one of these, be sure to contact the seller and have them reinforce the bottom of the box, as mine appeared to have dropped out while it was being carried.
Answer: no