ᐅ Water-heating wood stove (supplementing the air-to-water heat pump and mechanical ventilation with heat recovery)?
Created on: 30 Jul 2014 00:44
F
FrankDr
We are building a house of about 185 m² (1991 ft²) with 36.5 cm (14 inches) aerated concrete walls, aiming for KfW70 energy efficiency standard (I can provide data later, but that’s not the main point here).
In addition to a controlled ventilation system with heat recovery (probably a Zehnder, based on recommendations), the primary heating will be an air-to-water heat pump (Buderus). However, it is certain that we will also have a fireplace in the living room (for atmosphere, the enjoyment of a fire – the primal instinct of man, cozy fast direct heat, etc.). A side benefit: when the air-to-water heat pump becomes less efficient in winter, I like to burn some wood, usually self-collected from our own forest plot.
Now, the idea was to use the heat from the fireplace to warm the entire house by installing a hydronic (water-bearing) stove like the "Wodtke Tio," instead of a conventional fireplace stove. For this, the buffer tank would be increased from about 300 liters (79 gallons) to 850 liters (224 gallons), according to the initial (unverified) estimate by the heating engineer.
According to the manufacturer: "With a water-side efficiency of approximately 70% and a nominal heat output of 8 kW, the Tio heats the room where it is installed and simultaneously the buffer tank."
Would this be a good idea? (Additional cost including installation roughly estimated at 5000 euros compared to a standard fireplace)
In addition to a controlled ventilation system with heat recovery (probably a Zehnder, based on recommendations), the primary heating will be an air-to-water heat pump (Buderus). However, it is certain that we will also have a fireplace in the living room (for atmosphere, the enjoyment of a fire – the primal instinct of man, cozy fast direct heat, etc.). A side benefit: when the air-to-water heat pump becomes less efficient in winter, I like to burn some wood, usually self-collected from our own forest plot.
Now, the idea was to use the heat from the fireplace to warm the entire house by installing a hydronic (water-bearing) stove like the "Wodtke Tio," instead of a conventional fireplace stove. For this, the buffer tank would be increased from about 300 liters (79 gallons) to 850 liters (224 gallons), according to the initial (unverified) estimate by the heating engineer.
According to the manufacturer: "With a water-side efficiency of approximately 70% and a nominal heat output of 8 kW, the Tio heats the room where it is installed and simultaneously the buffer tank."
Would this be a good idea? (Additional cost including installation roughly estimated at 5000 euros compared to a standard fireplace)
Recommendations from construction companies often mean that they have purchased quotas from the manufacturer, resulting in even higher profit margins for them. The fact is that almost all heating contractors were more or less forced to enter the heat pump market. For example, take a look at the Ecodan technology from Mitsubishi Electric...
Bolzen schrieb:
Recommendations from construction companies usually mean that they have purchased quotas from the manufacturer, which increases their profit margin. The fact is that almost all heating installers were more or less forced to enter the heat pump market. For example, take a look at Mitsubishi Electric's Ecodan technology...Regarding the suspicion: No, our construction company does not earn a single cent from recommending or passing on the installation—that is certain. I have the purchase and installation done by another company. The recommendation for the Zehnder controlled residential ventilation system was really based only on their experience.
Is the Mitsubishi heat pump considered good or is it mentioned as a warning example? I can’t interpret your last sentence in that way!
Buderus also offers a heat pump combined with Mitsubishi, but I don’t know if it’s particularly outstanding. I will be advised about this in due course.
FrankDr schrieb:
Regarding the suspicion: No, our construction company does not earn a single cent from recommending or passing on the installation – that is certain. I have the purchase and installation done by another company. The recommendation for Zehnder controlled residential ventilation came purely from personal experience.
Is the Mitsubishi heat pump considered good, or is it meant as a negative example? I can’t interpret your last sentence in that way!
Buderus even offers a heat pump in combination with Mitsubishi, but I’m not sure if it’s really outstanding. I will be advised on this later anyway. Hi Frank,
My cousin is a certified HVAC technician and swears by Mitsubishi Electric. Many heating system manufacturers integrate ME components because they can’t achieve this themselves...
Best regards
B
Bauexperte1 Aug 2014 00:18Good evening,
Bolzen schrieb:
As far as I know, Mitsubishi is the market leader in heat pumps./QUOTE]
No, the market leader is Daikin.
Regards, Bauexperte
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