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: Does this unit accept hot water without damaging it?  I want it to produce instant hot water until the main house hotwater heater services the faucet.
Document: If you read the directions they say to base the unit size on hot water flow only, setting the temperature where a person would be comfortable showering without any cold water added (about 110F).
This is handy when changing out the sediment filter, or for other non-electrical maintenance.It will be interesting to note the difference in the next electric bill or two; this is the second tankless electric water heater we've installed in the house. (Purchased previous unit on Amazon, see my earlier reviews for that unit.) After the first one about eight years ago, the following month's electric bill was about $30.00 cheaper.
Hi,I have been trying to get a technical opinion but to no avail, this is my third emailThe unit arrived in good order no damageInstallation completed according to specificationbut no instant hot water, or shall we say starts and immediately dtopswe have proper electrical supply 40 watts and water pressure is normalmy Question. What may be wrong - do we need to reduce water pressure to What ???? ?Please respond or forward this message to technical department.Thank you
We have a older house and our 40 gallon water heater started leaking after the usual 5 years and as a stop gap I installed this 8 KW water heater to replace it until I could get the house setup for a 18 KW tankless water heater, (the 18 KW takes 2 dual 40 breakers and 2 runs of 8 gauge wire which would cause an upgrade our existing electrical panel! )And then found this is all we need for the whole house!I installed this myself, so there is no lifetime warrantee.
This unit was chosen to provide hot water for a wash basin in a single bathroom in a mountain cabin. The basin is located a long distance from the regular hot water heater and it took nearly a minute or two to get hot water. The ECO 8 unit installed easily and works perfectly delivering hot water at the spigot within a few seconds.
Only minor problem I notice is the unit thermostat has a hysteresis effect, meaning as it senses the outlet temperature and &#34;modulates&#34; the heating elements on and off the water temp fluctuates up and down. With a setting of 120 degrees F the outlet temp will fluctuate between about 90 degrees and 120 degrees. This is a minor problem that is handled by manually throttling the faucet handle up or down to regulate the temperature.
I read a bunch of reviews of this product before purchasing. Several warned about about leaking at the cold water inlet and hot water outlets. Compression fittings are provided and the installation instructions advise NOT to use teflon tape or paste. These fittings WILL leak without teflon. The problem is that they leak WITH teflon as well. On the advice of Ecosmart tech support, I have installed AND reinstalled these fittings three times now using no tape, a small amount of tape and more tape and have NOT solved the leaking problem.
I (late 40's, mechanically-minded woman) just installed this unit in our home. Installation not too complicated, this replaced a 50-gallon tank water heater. Servicing two sinks and two appliances, (kitchen, 1/2 bath and laundry room) I sized this item to the available electrical supply, as I did not wish to incur the extra expense of additional wire and another circuit breaker. Existing wiring consisted of one double-pole 40-amp breaker and sufficient gauge conduit.
I've installed and used a few different on demand water heaters over the last few years and this is by far the highest quality construction of any lower cost on demand water heater which I've seen yet. There were a few issues with the unit but their tech support line was amazing. They should be the model for any company that wishes to build brand loyalty!! On both calls, they have been fantastic. I'm not typically brand loyal but it's unlikely I'll ever look beyond Ecosmart products for future tank-less purchases.
This product is not advisable for Northern California,  would not heat water beyond luke warm for one faucet let alone a shower valve in a very small cabin.
Answer: yes