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Recuperation with cooling function - all suggestions to the heap

wic1 10779 30
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Treść została przetłumaczona polish » english Zobacz oryginalną wersję tematu
  • #31 21550903
    wic1
    Level 14  
    >>21464291 Hi!, make a bypass on the principle that if it causes the underfloor to cool down, you will be able to cut it off without problems. And sometimes the recuperator has to be switched off (even in winter) so that it doesn't freeze somehow, but at the outlet from the reek it should already be blowing with plus ones :P .


    If you are stubborn, you can do the same with an air conditioner, i.e. a heat exchanger/heater in a pipe (some kind of container or something) draining condensate and that's it.... can also be used for heating and cooling.


    At the moment, having a photovoltaic installation but under the new rules, I find that in winter there are only a few days when I have full batteries and can heat with it. In the autumn I leave similarly :P Here some kind of windmill would be useful, in the autumn it blows quite well.

    I consider the recuperator a comfort, but whether it saves money is up for debate. These so-called heat losses/gains are incalculable and the cost of installation is rather high.

    But... when it's sunny out, I go up to my hand and turn on the heating.... then the air vents give me 26'C, depending on how I set it. The heating first eats about 3kw and then drops a bit. Again, cooling in winter is only 1kw in my case + increased power of recuperator to take this heat/cool away and as a result eats somewhere around 1400w.... but with panels, as long as there is sunshine it's fine.


    Corab 6.2kw panels, inverter and 12kwh deye batteries. Offgrid inverter. I set it to heat the water when it has excess energy. Cool stuff, would recommend.

    Since March I am so that with hybrid operation (charging/discharging) the next day I have between 30 and 60% of the batteries (mostly about 45% which means I am fully self-sufficient). and when charging 5kwp I have enough for the house, heating water and gadgets like cooling/heating.

    If you are going to cool from the recuperator, you need something to insulate the pipes from the recuperator to the house. Otherwise water will condense on them and it will be a mess. If not on the pipes, then on the wall in which they run.


    Take care, good luck
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Topic summary

The discussion centers on the use and effectiveness of recuperators with integrated cooling functions in residential ventilation systems, specifically for a two-story house of approximately 130-170 m² usable area. The main focus is on the LMF Klima HRH 5 recuperator equipped with a freon module for heating and cooling. Opinions vary widely regarding the cooling efficiency, with some users reporting a temperature reduction of about 5°C when the system operates continuously from the morning to prevent heat buildup, while others note limited cooling capacity and higher electricity consumption compared to separate air conditioning units. Installation considerations include placement in the garage versus the attic, with concerns about heat gain in uninsulated attics and maintenance access. The system typically requires regular filter and exchanger cleaning, with costs ranging from PLN 200 to 800 per service. Discussions highlight the physical principles of heat recovery ventilation, emphasizing that recuperation primarily recovers heat rather than providing significant cooling, and that efficiency depends on temperature differentials and exchanger design. Some users combine recuperation with split air conditioning units for better climate control. Advanced setups include glycol chillers with buried ground loops for pre-cooling intake air and integration with heat pumps for passive cooling and reheating exhaust air. The overall consensus suggests recuperators with cooling functions offer moderate comfort improvements but may not replace dedicated air conditioning, and their cost-effectiveness depends on installation specifics, climate conditions, and energy prices. Maintenance, insulation quality, and duct design (e.g., avoiding spiro pipes to reduce noise and flow resistance) are critical for optimal performance.
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