I have had a C6 26L for 2 weeks, I cannot get it to fault as described in other posts on here. mine heats the water instantly, hot water in less than 10 seconds (3 meters from bathroom) I can turn on any other tap in the house and it does not effect hot water or pressure.

Recently had new Thermann26 installed to replace an old unit. We were not getting hot water to several locations in the house. I have had little response from the plumber but great response from Herrmann who have made attempts to come on-site to review. The issue is that the Thermann 26 is a 50 degree unit replacing a 60 degree so water temp lower than previous. It appears probable negligence on part of the plumber. Fantastic support from Thermann people to resolve the issue. Highly recommended.

Purchased this unit on recommendation from plumber after my old storage unit died. Pressure from this unit is atrocious. Shower at 1 end of the house goes completely cold mid shower and you have to turn off the cold water then wait for hot to come back. If you want to use two appliances like the kitchen sink and a shower.... forget about it.
Positive is it never runs out of hot water.
Definitely should have gone for another storage unit.

Previous dux heater used 45 kg bottle in 6 weeks only 2 0f us and hot water only thermann is at 11 weeks and still going spot on hot water and easy to use
Would absolutely recommend it we are on tank water with pump
No problems whatsoever
Rex f

One month in since I installed the Thermann 6* 16L and I'm very pleased. I only need to wait around 15-20sec to have a very hot water in the shower (@60C), I don't experience any water temp' fluctuation, and the water flow is steady.
the only reason I gave it 4*and not 5* is because you can't change the temperature without buying the R/C for an extra $100.(which I didn't buy)
Please note, the system is for serving two people with minimal use( showers and a bit in the kitchen ), the distance from the unit to the shower is around 8 meter, and to the kitchen is around 4 meter.
The installation was straightforward and cost $1100 including the unit.

Constant waste of water. From every outlet I have to wait ages for any hint of hot water with the cold turned off. The temperature also fluctuates still with the cold off. Sometimes it doesn’t even kick in and send hot water, I’ve had to go and turn the unit off and on again. Another waste of my money thanks to a plumber highly recommending it. Very very disappointed

So much water is wasted to actually get hot water. Bought this thinking it would be more economical, stupid decision. Used to be able to have a 5 minute shower, now to get 5 minutes of water at a perfect temperature I am standing there for at least 25 minutes. Shower goes cold after about 3 minutes. No good just trying to adjust the hot water tap. Have to completely turn the shower off and start again - so again you're wasting litres of water to get hot water. Our gas bill is also now a lot more!

I thought that it wasn't very good for the first two years, terribly bad pressure in the shower, good every where else, I had taken out shower head restrictor didn't seem to make any difference,, finally found another restrictor at the inlet, goodness two of them, my shower is now perfect

So much water is wasted to actually get hot water. Bought this thinking it would be more economical, stupid decision. Used to be able to have a 5 minute shower, now to get 5 minutes of water at a perfect temperature I am standing there for at least 25 minutes. Shower goes cold after about 3 minutes. No good just trying to adjust the hot water tap. Have to completely turn the shower off and start again - so again you're wasting litres of water to get hot water. Had an elderly relative stay who needs a shower chair, she had to bathe at the neighbours - she would either have 3rd degree burns or be frozen at our house. Continuous hot water - what's that?????

We had one of these installed about six months ago. The hot water temperature is perfect. The plumber recommended this system and it has been a great choice. Would highly recommend one of these continuous hot water systems. It is much cheaper to run than the old electric hot water service.

So our we replaced our old gas water heater, Tank type. This Thermann produces a lot of hot water, fantastic. Problem is you cannot use water saving shower heads, need the waterflow to be high in order to get consistent water temperature. The worst part for us, is the exhaust gasses (Carbon monoxide) will fill the shed and or gazebo so you have to vacate these areas until the gasses disappate. So now I have been informed that my options are to relocate the hot water water system (and plumbing) or get a an additional flume to discharge the gasses above the roof line of the house which will hopefully prevent the gasses filling the gazebo or shed.

I had this unit installed to replace the useless Chromagen Solar Hot water system. The Thermann unit I had installed by Diamond Valley Plumbing is the 26L 6 star unit which is preset at 60deg. The water heats very quickly and is continuous without any disruption. The unit comes with a 12 year warranty for peace of mind also. Leaves the old Chromegan system for dead and no stupid oversize storage tank taking up space.