Quote:
Originally Posted by azasadny
When we looked a few (3) years ago, the tankless units still were not recommended for a family of 4, especially with 2 showers going at the same time every AM, as well as a dishwasher, washing machine, etc... We got a 50gal GE water hreater and that thing can barely keep up. They seem to be pushing the tankless units at the home improvement shows. If I recall, you have to use stainless steel (not PVC) to exhaust the tankless units, too.
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The unit you mention is too small. Look at the float rate and the water pressure coming into the house. The pipes might be old and don't have enough float. Many of our clients have muti shower heads, body jets and big tubs, still run the dish washer and wash clothes at the same time. A big unit like the TM1 will do the trick. I have that very same set up at my house. God only knows my wife take the longest shower when our kids are over at my parents. She sits on the freaking bench in there. The temp doesn't drop at all after 1/2 hour of running the shower. Sometimes, we install 2 units in each corner of the house so the run isn't too long with a recirc. pump. Inorder for that to work correctly, I always suggest changing out some of the incoming water pipes if it hasn't been change in 50 years. Many people think that I am trying to rip them off and sell them something they don't need. My job as a contractor is to educate my client so they will have years of trouble free kitchens and baths. If they disagree, and still expect it to work at a 100%, then we will not take the job. I refuse to do *****y work. It like putting a turbo charger in a SC motor with over 250,000 miles on it and expect it to be last for years to come. 70% of our work is design and build custom kitchens and baths. We have never have any problems with these units so far.