Qvantum QE Exhaust air heat pump, DO NOT BUY.
Qvantum QE Exhaust air heat pump, DO NOT BUY.
With our old system we never had any issue in regards of hot water or heating, but after almost 20 years, I replace my existing NIBE Exhaust air heat pump with the Qvantum QE. Since the new Qvantum QE Exhaust air heat pump has been installed in my flat I have been living in a sort of nightmare with unlimited problems as described below.
Problems:
1) No enough hot water for a bath.
2) No options to set temperature in different time of the day, e.g. Day/Night.
3) Property temperature constant during day/night.
4) No option to switch off the heating if no needed.
5) Higher energy cost than expected.
6) Limited support from technical staff to resolve/improve comfort.
During the long life of our old system we managed to reach a balance between comfort and system efficiency. Our heating ideal comfort settings for the winter time were as follow:
Between 08:00am until 10:30pm we kept the flat temperature at 21 degrees.
From 10:30pm until 05:00am heating were excluded unless the flat temperature fall below 17 degrees (minimum floor temperature).
From 05:00am until 08:00 the flat temperature was set to rise 1 degree per hour.
The Qvantum QE statement state that is all about the people.
The Qvantum QE state “instantaneous hot water production”, statement which we have found to be misleading, since we installed The Qvantum QE we are unable to have a hot bath, as the water come just warm and not hot enough to fill-up a single bath, we are forced to boil hot water from the Kettle, which is not cost effective as we need to use a large amount of energy to be able to have the hot bath we used to have. Qvantum QE – Exhaust air heat pump.
Qvantum QE – Exhaust air heat pump have the following statement “meet the comfort demands of the home”, which we expect that system is built around the people who use the The Qvantum QE and not vice-versa, again we found this statement misleading.
Since the Qvantum QE Exhaust air heat pump was installed we had a number of problems which are still unresolved.
When the system was installed, on Friday, we suffered almost the whole week-end without heating as the system was wrongly installed.
When the next Monday the installer returned to complete the installation, the system was not responding and even if the comfort temperature was set at 21 degrees, it was warming the property at over 24/25 degrees, which forced us in different occasion to just switch off the system. When complaining the reply from the installer was that the system was installed correctly and it was working. We lived for a week in a sort of hell with unbearable temperature day and night.
After contacting directly the Qvantum after sale service we managed to have the upper temperature sorted-out but we still have issue with the lower temperature as the Qvantum QE does not allow having a night temperature below 19.5/20 degrees.
We were asked what would be our comfort temperature, which is 21 degrees during the day. The service support set the comfort temperature at 21 degrees, but again this temperature is now constant day and night. An ideal bedroom temperature should be at around 16-18°C Sleep Environment - The Sleep Charity, this have severe complication in our wellbeing and comfort, as we are having sleep-less nights.
When contacted the support service, we had several unlikeable reply and no real solution to our core problem.
It was explained that the system for a maximum efficiency it need to have a constant temperature. It was explained that the system operate similar to a fridge where the need to have a constant temperature of a pint on milk is similar to the need of a human being live in a flat with constant temperature day and night, (no difference between a human and a pint of milk).
Another possible solution was to keep the bedroom window open to allow the room to keep cooler.
Now we have excluded the radiator in our bedroom.
In the night we set the thermostat temperature at 15 degrees, but the Qvantum QE keep warming our flat at 19.5/20 degrees, no option to have a cooler flat temperature during the night.
We are keeping wake-up in the night with dry mouth and hot flashes.
As the Qvantum QE keeps running over night, even if we want to exclude it, it cost us unwanted money. I calculate, taking picture of the meter reading before go to bed and early morning, that we use an average of 7kwh per night. A quick calculation, if 1kwh cost £0.30 then 7Kwh cost £2.10 per night or over £60 per month, which could be easily avoided or reduced if the Qvantum QE would allow to keep our desired setting.
3 de janeiro de 2025
Avaliação não solicitada
