A little surprised by the lack of interest for this section on a site that speaks of ecology and emission of co2 while the performance of air / air heat pumps has improved considerably, that I warm up with this system in all satisfaction since about thirty years (without maintenance required by qualified personnel and an outdoor fan bearing seized on the old Westinghouse in 29 years)
With the new pumps, I have no resistance installed (add-on or defrost)
Only downside, the regulation of T ° is not at the point and will be improved incessantly.
At the moment, I pay per month 106 € (12x8 floor meters with 1 floor + cellars) while I have two PAC air / air in main and air / multi split in secondary which will serve almost exclusively to the air conditioning. attic rooms if necessary (3 + bathroom)
I was horrified by the announcement of certain consumptions
The main installation was calculated to maintain 22 ° day - living rooms and 18 ° ds rooms (old mom of 87 years living with me)
At the -17 ° c this year, I managed to push the Zubadan cap has more than 24 ° C in living rooms
In view of my current meter readings and the long winter, I feel happy because I have not yet reached my overall consumption 2009 (10.320Kwh statement of 2 May)
Everything is electric at home, even the water heater and my roof slopes are unfortunately not located in the south!
But we have to put everything in context, I built in 1979 after the first oil shock and I was particularly attentive to the insulation and the use of a wood frame (Norwegian Technique)
I was criticized at the time because all good Belgian had a brick in the belly
It is then necessary not to rush (to make a thermal balance) and to remedy in the first places to the observed abnormalities, to inform a practitioner (good knowledge in thermodynamics and fluid mechanics) to choose its material and the range of power corresponding to his home (too much or too little power = poor performance because it does not work most of the time at its ideal operating point)
The compressors of the new generation no longer work in all or nothing like my old PAC but modulate and reach their optimal operating point under certain conditions
Above all, avoid the so-called enlightened advice of people who call themselves ecologists but who especially live in them
As for the other two systems water / water and air / water (notwithstanding that having a higher performance for the first), I remain dubious about the longevity of equipment, the cost of maintenance and irreversibility without significant costs of possible power calculation or assembly errors during installation.
There are still other variants to install on the old central heating (too few returns) but all is to think carefully and to be guided by people of confidence, craft and not by carpet traders
