Wednesday 16 February 2011

Heating solution chosen

Now that the house drawings have been finalized I posted them under section "House package"

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
- 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.

Saturday 12 February 2011

Meeting on the plot and hunting fireplaces

We met this morning at the plot all the key-people of the project. Head designer, Lapponia house representative and landwork contractor. At -13degrees it was rather chilly meeting... but got valuable second opinion for the landwork (maatyöt) and making the roads last. The landbase is soft clay (old bottom of Baltic sea) and needs to be made strong enough for big machinery of 40 000kg to delivery elements. Since we have about 1meters of snowbed at this very moment, there is no deep frost in the ground but when the snow melts... we will propably come across with some flodding issues. So planning of the roads was rather interesting because of the deep snow... Let's see how it will all go.

Last weekend we were totally scared off by some contractor candidate with the mount of work in order to make the bottom strong enough. Estimate given was about 30 000 eur but today it wasn't that bad at all. So always ask for second opinion or even third. We will go for some contractor known and recommended by Lapponia house.

We also went again to see some fireplaces. This time we entered a company called Tulikivi and there we found some charming old fashioned, traditional fireplaces. Somehow I have been thinking of a modern style so far but Tulikivi made me seriously dream of having proper all-around-tiled fireplace (kaakeliuuni). Tiles are handmade in Finland and this gives some idea of the price too... Roughly 10 000 eur for a fireplace with oven and tandem-chimney incl. installation and delivery. Tandem-chimney we need because we will have wood-heated sauna on the other side of the fireplace wall. So one chimney goes for two "stoves". 

So at the moment we have 3 candidates we are looking at:
One model from Tulikivi 

Another model from Uunisepat:

and a cheaper version from Suomen Takkateollisuus: