The Quantum heat pump is extremely, extremely noisy. We now have to spend $4,000 on a gas system because the Quantum system wakes our young family and neighbours up. I do not why ethically Quantum can sell them without disclosing how much noise pollution they provide. I urge anyone to avoid considering a Quantum heat pump.

too noisy

Although this quantum unit was purchased 14 years ago, we have never had a problem with it producing instant hot water.
It has produced bountiful steaming hot water and halved our energy expenses.
I got it serviced two years ago as recommended by Quantum although it didn't seem necessary as it was functioning
superbly.

Seemed expensive at the time but pretty cheap in retrospect !

We have had a Qantum Hot Water System for 6 years now, and it is still going strong. We regularly get down to overnight temperatures of minus 5 degrees, but we also have plenty of hot water, so the sub zero air temperatures don't bother these Heaters. Quiet, efficient, and helps keep the electricity bills low. Cannot really comment on Customer Service as we haven't had any problems.
Inexpensive Hot Water
The fan can sometimes be a bit noisy, so avoid putting one near a bedroom.

I had my unit fail just after the warranty expired. The unit started working continuously and stopped heating. I tried to contact Quantum and after several tries, i finally got thru and was told that their after sale service was outsourced and there was no authorized service agent near my suburb. They gave me the name of a couple of aircon tech companies who i contacted. Regretfully, they knew nothing about the unit and would not touch it. I ended up getting a new gas unit and will never ever consider a heat pump unit. I will also ensure to tell everyone I know about the pathetic customer service I received from Quantum.

Bad service, unreliable product.

I have been selling Quantum Heat Pumps for over 14 years nearly since the inventor [name removed] (Sydchrome and Ramset fame) sold out and have sold many and fixed many .You will hear of only the lemons or of the people that complain but I can assure you that of the 1000 odd I have sold, to my knowlege all are still going bar four and three of those were replaced under warranty by Quantum Energy.A wonderfull patiented Australian invention that will only cost you about $150 per year to run compared with $400 -500 for gas
Near perfect in its manuafacture and should last 20 years
Administration is running on low at the moment.

After years of having electric hot water system I was referred by my plumber to get a Quantum Heat Pump - I was a little hesitant but will never look back now! I have endless hot water and my bills have been cut in half!!! I would definitely recommend a Quantum!!
Cost and efficiency
noting

I called Quantum service Line to find the nearest Service Person and had to wait 3 Days for a return Call. Works OK in Summer but is useless and unreliable in Winter. Some Days it just won't heat the Water,but it is running continuosly.Not easy to find a Service Person to touch a Quantum Waterheater and neither will I, ever again

Capaciter burned after 2 years,Result $ 27.00 for Parts - $ 300.00 Travel

The quantum heat pump is the worst available heat pump on the market! Overpriced product with no more benefits than any other similar product! Break down constantly and the company has a complete lack of service. Staff Do not care and after meeting someone who has worked there it seems as if the company do not care about there staff in essence STAY AWAY!

Still don't know! No one will help me, and No plumber will touch them

My (90 year old) Mum's Quantum failed just after 5 years, outside the warranty.

Called Quantum service and they took the details and said someone will call back. Still waiting to date for the call back. Called again the following Monday and finally got to talk to a real person who took an interest. Gave 'sort of local' air con tech to come. He had the devil's own job to get parts out of Quantum and they were so slow in dispatching a new compressor.

Never, repeat never again will I recommend a Quantum to anyone else - let alone purchase one again. After they sell the HWS, they dont give a hoot about you.
Unique technology to heat water is great.
Extremely poor after sales service.

Almost didn't buy one due to negative reviews on websites - claimed to be noisy! Total nonsense and probably put in by solar HWS &/or heat pump competitors. Sound levels about that of a fridge or quite airconditioner. Well installed by local agent (Townsville). Previous experience with solar HWS (Charters Towers) was that it didn't last.
Good HWS, quiet unit, performs well, saves power.

I will never ever install another Quantum Chinese made heat pump. After forking out over $3400 for the product 2 years ago, we have had nothing but major issues with it. The unit has failed for the last time. I live in country WA and will be going back to a 250 litre electric storage unit, which is what we had before. What a waste of money .

Unit ran almost continuously after degassing itself. Quantum serviced the unit as obliged under warranty. When same fault happened again just out of warranty they were not interested! They said we should he known that the unit was being overworked. Perhaps they were right! If I had been sleeping outside by the unit I may well have heard it running almost continuously before I did. Has turned me off heat pumps for good.

Epensive, bad after sales service on pre existing problem