Thermann Heat Pump Hot Water Review

Tim's Thermann Review

I recommend avoiding the Thermann units. As with most things from Reece, I feel they are overpriced. Although there aren’t many reviews, the units do not look reliable. With such a hefty price tag, I’m confident you’ll get better value for money with another unit.

❌ Cost: Thermann units are overpriced

❌ Reliability: The units do not look reliable. Reviews are poor and the warranty is weak

➖ Refrigerant: The split units use carbon dioxide, which is a good refrigerant, but the all-in-ones use R-134a, which is terrible

✅ Maintenance: Maintenance requirements are standard

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Thermann is Reece’s ‘homebrand’ heat pump hot water unit.

There are two Thermann units

Split unit
All-in-one - made by Stiebel Eltron and there’s a strong argument to say they are the same unit.

There aren’t many reviews on Product Review (only 17), but they are not positive: 2.9 stars for the all-in-one unit.

I have often tried to speak to people at Thermann/Reece to verify details (as I do with all manufacturers), but I’m yet to hear a response. I suspect the people at Thermann simply try to piggyback off Reece’s huge distribution, rather than develop a quality unit.

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Thermann Specifications

Model	Split/X Hybrid
Split/All-in-one	Split & All-in-one
Capacity (L)	Split: 160/250/315/400 All-in-one: 220/300
Tank Material	Glass lined
Tank Protection	Impressed current anode
Place of Manufacture	Split: Tank - Australia Compressor - Japan All-in-one: Germany
Product Review Score	2.9 from 15 reviews
Warranty	Split: Heat Pump - 6 yrs Tank - 10 yrs Parts & Labour - 2 yrs All-in-one: Cylinder - 5 yrs Parts & Labour - 2 yrs
Time in Market (Unit)	?
Company Founded	?
Noise Level	45 dB
Maintenance	Split: 6 months (owner) - open the PTR valve 5 years (tradesperson) - repalce the PTR valve, replace the anode, drain and flush the unit All-in-one: same as Stiebel Eltron
Recommended Retail Price (RRP)	$5,224/$4,168

I have tried to contact Thermann to verify the details above
Pleasingly the split unit uses carbon dioxide as the refrigerant. However, the all-in-one unit appears to use R-134a, which I’d expect to change if it hasn’t already as R-134a is being phased out.