Now that the house drawings have been finalized I posted them under section "House package" http://project-eco-house-finland.blogspot.com/p/house-package.html
We have now chosen a (water) heating solution based on:
- NIBE latest generation ground source heat pump F1245 6 Kw with 180l water tank incorporated in the same unit.This pump is being advertised as reducing the heating bills by up to 80% i.e. one 1kw energy is used to produce 5kw of energy. See product page here http://www.nibe.eu/Domestic-heatingcooling/Ground-source-heat-pumps/Product-range/NIBE-F1245/
- the heat collector will be in a ground probe/ energy well to 130m underground
- water based floor heating in the whole house - the water circulation temperature in the loops should be only 30/35 Celsius compared to radiators which would need more like 50/55 Celsius.
- air-ventilation unit Enervent Pingvin ECO EDE-CG with heat recovery efficiency of over 75%
- cooling in the summer using the cooling from the ground source pump connected to the air ventilation unit
- during very cold days we can also use the fireplace
As the house will be well insulated this solution should be sufficient for the house heating and warm water needs (or so we have been advised). If in the future it makes sense, the NIBE pump also allows the possibility to add solar panels to heat the water and/or add additional water tank.
The rough price breakdown (we agreed a total price in the end) was:
Heating system:
- NIBE 1245-6 ground source heat pump and installation - 8600
- energy well 130m - 3900
- floor heating main house 160m2 - 3000
- floor heating storage 23 m2 (including pipe in the ground bringing the warm water from the house to the storage 40m) - 2000
Total 17500
Ventilation and cooling system and installation:
- air ventilation with heat recovery: 11000(damn expensive machine based air!)
- cooling (based on ground source heat pump - 3000
Total: 14000
Besides the above we also got from same company (Nord Energy) the water and suiwage materials and work on the inside the house for about 8000 euro.
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