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Hydronic Question

mpozz
mpozz Member Posts: 2
in Radiant Heating
I have a 320 sf shop with a 2 loop 1 zone system cast into the slab. The slab sites on 3” of foam.  I’m looking for suggestions on a heat source.  Most boilers are too large. Any thoughts on an electric point of use.  

Comments

  • GroundUp
    GroundUp Member Posts: 2,031
    A small electric boiler would be ideal, but possibly a small tank water heater depending on the actual heat loss of the space
  • mpozz
    mpozz Member Posts: 2
    GroundUp said:
    A small electric boiler would be ideal, but possibly a small tank water heater depending on the actual heat loss of the space
    The space is very well insulated and I’m not looking to turn into a tropical paradise. 
  • Zman
    Zman Member Posts: 7,609
    You would be safe to assume your heat loss is <30 BTU/ft .
    A watt= 3.412 btus. A typical 40 gallon hot water heater is rated 4,500 watts (15,354 BTU).
    "If you can't explain it simply, you don't understand it well enough"
    Albert Einstein
    kcopp
  • WillyP
    WillyP Member Posts: 48
    You can use a small hot water heater. For a space that small in a closed system, just about anything made for hot water would be enough.
  • hot_rod
    hot_rod Member Posts: 22,864
    Or a small gas or LP fired water heater, if the fuel costs are lower. While the output is too large the 40 gallon tank is an ideal buffer. What are your true KWh costs. Gas or LP?
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream

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