Heat Pump Hydronic Radiant vs Mini Split in <1000 SF home
I am an Architectural Engineering Student passionate about sustainability, energy efficiency and the impact the built world has—however; little real life building experience so value the input.
I am currently working on a NZE affordable project and curious to get some opinion.
In a 81% Heating Degree Dominated small home to me it makes sense to use a high efficiency heat pump hot water heater. When the DHW & Space heating load are about the same through passive strategies/solar gain I feel that using a high temperature heat pump with a high temp tank (DHW) & buffer tank(Heating) would be beneficial & could balance out the cost.
Most curious about CO2 heat pumps and their increased efficiency and lift temp for DHW but know they are (at least used to be) still very expensive. Also something about code in the US possibly? Has anyone used SANCO2’s product?
With three zones (main, 2 bedrooms) wouldn’t the 3 indoor units for a 800 sf home be comparable to a PEX tubing system. I know a ducted heat pump system would be the most economical but we have alternative motives for a ductless/radiant system.
That being said does anyone have any opinion or could give some insight to the cost/feasibility in Colorado?
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