boat retrofits solar heat 3 the storage tank. The storage tank will provide hot water for both domestic hot water use as well as space heating, which will be self-constructed from PEX coils running underneath the flooring. COST & LABOR ESTIMATES The estimated costs for the DIY solar collector and water storage system are 1.600 €. Installation of the system will require approximately 40 hours of labor. 4 heating system floor heating installation. COST & LABOR ESTIMATES Electric boilers can be purchased for as little as 300 €. The materials for the floor heating system and its associated controls are estimated at 700 €. The labor for installation is estimated at 60 hours. A central step in achieving a renewable heat supply in the de Ceuvel boats is the installation of a DIY solar space and water heating system. Each boat should be fitted with a 5-square meter collector system and have an insulated water storage tank of 500 liters in the boat’s basement or crawl space to store the heated water. We recommend a flat plate collector with a drainback system to prevent freezing without necessitating any potentially hazardous anti-freeze agents. A differential controller will activate the pump and determine when the water needs to be moved from the collector to The heating system on each houseboat will consist of DIY radiant floor heating connected to the solar collector and topped up by an electric boiler. This system can be upgraded in phase two with additional heat collection from the greenhouse using fresnel lenses. If possible and deemed necessary for risk management on each particular boat, we may also install wood burning stoves for supplemental heating. Most boats will come equipped with a gas boiler, which can also be sold to recoup some of the costs of purchasing an electric boiler and the 44 / 146 Pagina 43
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