ᐅ Pellets combined with solar thermal or photovoltaic systems?

Created on: 15 Jan 2020 09:02

Hello everyone,

I am currently facing a small issue with planning the heating system.

A pellet stove with about 12 kW output is firmly planned. However, it should be supported by solar energy.

The question now is which option makes more sense...
1. Support from solar thermal system
2. Photovoltaics with an electric immersion heater in the buffer tank

Details:
Floor area about 175 sqm (1887 sq ft)
Building style: urban villa with basement
KfW 55 standard
Ventilation with heat recovery
Underfloor heating throughout the house
Orientation: south (10 m (33 ft) roof width facing south)
Roof pitch about 23°

The question is also which combination is best for subsidies/grants.

Thank you very much

fragg15 Jan 2020 13:27

#37

Zigenpeter86 schrieb:

@nordanney
Why should a pellet heating system require 20m² (215 sq ft) more space? A heat pump is always without an external unit. I don’t want to have such a device standing in the garden.

But the calculation is interesting. I need to work it out more precisely, especially regarding the consumption for domestic hot water.

As I said, a chimney will be installed anyway because of the fireplace in the living room.

You can’t connect the stove to the same chimney.

Zigenpeter8615 Jan 2020 14:21

#38

That’s clear, it will be a two-flue chimney. I am aware that it will naturally be more expensive than a single-flue one.

ᐅ Pellets combined with solar thermal or photovoltaic systems?

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