New super-efficient hot water heater

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When we moved into our house, I was “pleased” to discover that our hot water system dated back to 1988 (a new record for our plumber!). A Rheem gas hot water system, it mostly worked, but it was clearly just a matter of time before it failed.

After doing some research, our new water heater went in today. It’s a Bosch 26eco+ instantaneous gas system, with a whopping 6.9 star rating (out of a possible 6 stars). By comparison, most houses seem to be putting in 5 or 5.1 star systems.

Why we choose this:

  • We looked closely at solar hot water, both conventional and evacuated tube systems. Two big problems: we’re really short on sunny roof space, and these systems cost $4k+.
  • In the end, we decided that solar power (PV) would be a better use of our available space (this will be installed in late March, watch this space for a blog post).
  • Installed, the Bosch system cost $2k.
  • As we we’re moving from a gas system, there are no Australian Government rebates available to us.
  • Staying with gas (as opposed to a heat pump) seemed to make the most environmental sense.

It’s a marvelously small unit compared to our old 1980’s hulking beast. I’ll look carefully at our next gas bill, and will report back…

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3 thoughts on “New super-efficient hot water heater

    Choosing solar panels « Lewisham House said:
    April 11, 2010 at 5:23 pm

    […] New super-efficient hot water heater […]

    Oliver Bock said:
    April 12, 2010 at 2:05 pm

    Was your plumber born yesterday? My house has an off-peak electric water heater from the 1950s, and it’s still going strong. Only gravity fed, so not much pressure.

      James responded:
      April 12, 2010 at 7:42 pm

      Trust me, the water heater was near the end of it’s life. Heating was becoming unreliable, and I’m sure efficiency was poor at best. No shortage of rust as well, not to mention being bolted to a wall which will be pulled down when we extend the house…

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