My friend has a 48x52 insulated pole barn(R45 ceiling--R19 sidewalls) with in floor heat. (electric boiler) The boiler is a wall mounted unit with three heating units in it and it is a piece of crap. He has already replaced two of the units (warranty0 and now one of those and the third is acting up. He wants to replace the boiler. Question is two fold. How big of a unit (Btu) and what brand do you recommend? Thanks, PK
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