ᐅ Is it practical to combine an air-to-water heat pump for underfloor heating with an exhaust air heat pump for domestic hot water?
Created on: 8 Aug 2016 14:24
B
BigFlowHello,
our developer presented the following heating concept:
- Fujitsu Siemens air-to-water heat pump to supply the underfloor heating
- Fujitsu Siemens exhaust air heat pump for heating domestic hot water with a 300L (79 gallons) tank
- Exhaust air from bathrooms and kitchen, possibly additional rooms depending on the energy consultant's recommendations
- Fresh air supply through membranes integrated in the windows
In my opinion, it is an advantage that the outdoor pump only needs to provide a flow temperature of 35°C (95°F). Meanwhile, the heat pump for domestic hot water hopefully never has to handle below-freezing temperatures 🙂
On the other hand, I wonder if these membranes allow outdoor air to enter directly. So, in summer it could be too warm, and in winter too cold. It seems like the underfloor heating would then have to reheat all the cold air in winter, which wouldn’t be efficient. Or am I overthinking this?
Has anyone had experience with this setup? Is it generally not recommended, or is it, as often, not that simple to answer?
our developer presented the following heating concept:
- Fujitsu Siemens air-to-water heat pump to supply the underfloor heating
- Fujitsu Siemens exhaust air heat pump for heating domestic hot water with a 300L (79 gallons) tank
- Exhaust air from bathrooms and kitchen, possibly additional rooms depending on the energy consultant's recommendations
- Fresh air supply through membranes integrated in the windows
In my opinion, it is an advantage that the outdoor pump only needs to provide a flow temperature of 35°C (95°F). Meanwhile, the heat pump for domestic hot water hopefully never has to handle below-freezing temperatures 🙂
On the other hand, I wonder if these membranes allow outdoor air to enter directly. So, in summer it could be too warm, and in winter too cold. It seems like the underfloor heating would then have to reheat all the cold air in winter, which wouldn’t be efficient. Or am I overthinking this?
Has anyone had experience with this setup? Is it generally not recommended, or is it, as often, not that simple to answer?
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