RT2012 Recommended Boilers (Thermo Dynamic)

For RT2012 one of the ways around having to have expensive solar solutions is to fit a thermodynamic boiler.

This one on Mano Mano is 1.5k euros and may be what we need. 

According to one green energy site they reduce the annual cost of heating water from 350 to 80 euros for a 4-person house.

https://www.manomano.fr/chauffe-eau-thermodynamique/aeromax-4-vs-270-l-thermor-296061-519359?model_id=519359


This comes on the list under ventilation…

This might be one? https://www.atlantic-climatisation-ventilation.fr/ventilation/chauffe-eau-thermodynamique-sur-air-extrait/aquacosy-av/aquacosy-av-100l-et-200l
2035 euro


How thermodynamic water heaters work

RT2012 recommended wood burners

Rika Impera XL http://www.rika.at/fr/impera/
88% efficient
https://www.debonspoeles.fr/produits/poeles-a-bois-intelligent-rika/impera-xl/
4-8kW
6380 euro


Rika Imposa http://www.rika.at/fr/imposa/
https://www.debonspoeles.fr/produits/poeles-a-bois-intelligent-rika/poele-a-bois-imposa/ 
86% efficient
5-10kW
4380 euro


Rika Jazz https://www.debonspoeles.fr/produits/poeles-a-bois-intelligent-rika/poele-a-bois-jazz/
83.1% efficient
3.5 to 7 kW
4400 euro


Rika Twist https://www.debonspoeles.fr/produits/poeles-a-bois-intelligent-rika/poele-a-bois-twist/
79.3% efficient
4-8kW
3552 euro


Invicta Odysee http://www.1poelepascher.com/fr/45-poele-a-bois-odyssee-6163-44-de-invicta-pas-cher-3244336163443.html
80%
50cm logs
raccordement direct d’un conduit pour l’arrivée d’air frais extérieur
12kW
http://www.monpoele.com/poele-a-bois-odyssee-975.html 1475 euro

Invicta Onyx (it’s an inset) https://www.leroymerlin.fr/v3/p/produits/poele-a-bois-invicta-cheminee-onyx-6120-46-12-kw-e48236
76%
12KW
71cm logs
2600 euro


Invicta Pharos https://www.leroymerlin.fr/v3/p/produits/poele-a-bois-pharos-invicta-12-kw-e1501559196
12kW
No exterior air
40cm logs
1599 euro


Deville Emeraude http://www.carre-discount.com/poeles-a-bois/poele-a-bois-deville-emeraude-noir-7-kw
80.2%
7kW
36cm logs
1389 euro


Deville India http://www.placeduchauffage.fr/poeles/519-poele-a-bois-deville-l-india-metal-brosse-9kw-buches-55cm-c07782-expo-3101790040607.html
81%
9kW
exterior air I think
979 euro


Deville Grand Safir https://www.deville.fr/fr/nos-produits/les-poeles-a-bois-buches/grand-saphir-c077ah
81%
50 cm logs
9kW
1176 euro


Godin Galatea https://www.poeleetambiance.com/poeles/poeles-bois-poele-et-ambiance-valence/poeles-bois-godin-valence/721-poele-a-bois-bbc-godin-galatea.html
7kW
33 cm logs
2161 euro


Jotul F162 (F160) http://www.equip-habitat.com/chauffage-poeles-a-bois-tout-fontejotul-f-162,50-799.htm
83%
33 cm
9kW
1539 euro


Jotul F480 https://hagleystoves.co.uk/product/jotul-f480-series/
75%
30 cm logs
10kW


JØTUL F 373 ADVANCE https://jotul.com/fr/produits/poeles-et-inserts-a-bois/poeles-a-bois/jotul-f-370-advance-series/jotul-f-373-advance#technical-area
78%
33cm logs
10kW
2580 euro


JØTUL F 520 https://jotul.com/fr/produits/poeles-et-inserts-a-bois/poeles-a-bois/jotul-f-520
77%
50cm logs
12kW

http://www.firesidestore.co.uk/jotul-f520.html
GBP 2699


Palazzetti Irene https://www.poeleetambiance.com/poeles/poeles-bois-poele-et-ambiance-valence/poele-bois-palazzetti-pas-cher-prix-poele-fonte/2346-poele-a-bois-palazzetti-irene.html
74.9%
10kW
3179 euro


Supra Ontario 4 https://www.amazon.fr/Supra-Ontario-4-01-Puissance-Couleur/dp/B0069X456W
33cm
8kW
2459 euro


Supra Quattro https://www.cdiscount.com/bricolage/chauffage/supra-quattro-poele-a-bois-8-kw/f-16612-supra117300.html
8kW
1617 euro


SUPRA Ulysse https://www.leroymerlin.fr/v3/p/produits/poele-a-bois-supra-ulysse-10-kw-e1401181146
10kW
77%
50cm
No exterior
1199 euro


MCZ Thor (all the oxygen used for combustion is taken outside) http://www.atoutflam.com/chauffage_bois_poele-a-buchemcz-thor-5-3086.html
83%
7.2kW


MCZ Chari (all the oxygen used for combustion is taken outside)  https://www.poelesabois.com/se-faire-aider/choisir-son-poele/poele-buches,260,MCZ,Chari.php
78%
9kW
1300 -> 1800 euro


MCZ Bahr https://www.mcz.it/fr/produits/bahr/
84.7%
7kW
1300 euro (estimated)


MCZ Nogal https://www.mcz.it/fr/produits/nogal/
85%
7kW

Messages Sent

24/10/18 – Message sent to http://mmu34.eklablog.com via their contact form.

I am planning a GREB house and considering how do to the foundations. I am interested in the method you chose and also the products you used. What is the make of the polystyrene blocks? I have tried to find them using the internet but no luck. Do you find the floor is well insulated?

Calculating roof pitch

Slope pitch conversion, % pitch to degrees pitch can be found here.


I’m calculating a suitable roof pitch (truss roof) to allow at least 30cm of insulation to exist at the inside of the bale wall (interior) to minimise heat loss on this area of the house. The solution can be a raised heal but alternatively the slope of the roof can be formed so that insulation can be maximised.

I just read on https://www.leroymerlin.fr/v3/p/produits/tuile-imerys-toiture-rouge-romane-sans-e46534#questions-answers-details that the Romane tile can have a minimum of 15 05 degrees pitch (27%).

I’m just going to work the numbers with a 25 degree pitch to make the roof above more shallow.

tan(25)*4.45
25-degree pitch would give 2.07 metres to the eves

tan(25)*0.95
0.44 meters at the internal edge of the bale in the roof

25 degree pitch is 46.6308%

A Simple Woodburner or a Boiler Stove?

Someone in a self-build group suggested a boiler stove instead of just a burner requiring separate water heating. The oone they linked to had a heat output of 2kW with 8kW going to the water. That seems low given we’ve been told we need a 10kW stove for m2.

Cost wise they’re not much difference though. Something to consider?

This one, the Stratford EBW12, has a total output for 24kW, of which 6kW goes into the room and 11.8kW into the water.

It has a direct air supply (required by RT2012).

£1,912.00

Stratford EBW12 wood boiler stove

Trying to find out why you’d choose a water heating stove and the Centre for Alternative Technology have an article suggesting that it’s not worth it unless you have a super-duper stove such as the Broseley eVolution 26 boiler. With this you get 10kW for heating and 15.8kW for hot water heating. I can’t find a price for it though!

Floor screed


A floor screed is usually a cementitious material made from a 1:3 or 1:4.5 ratio of cement to sharp sand. It may be applied onto either a solid in-situ concrete ground floor slab or onto a precast concrete floor unit.

Source: Concrete centre

I just read that apparently you don’t use rebar in screed… don’t know why or if this is correct.