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Stove and Boiler Capacity for a New Build

  • 11-05-2011 9:06am
    #1
    BMD
    Registered Users, Registered Users 2 Posts: 146 ✭✭


    Hi,

    I am building a well insulated house, airtight and I am installing two solid fuel stoves (one with a back boiler, the other without) and I am looking for information on the required capacity I need for these two stoves.

    Stove with Back Boiler
    This will be going into a room that is 6.45 m x 5.4m with a vaulted ceiling bringing the volume of the room to 115m3. It will be supplying a 500L buffer tank. I want to know how many kW or BTU's I need for the room and the same for the boiler?

    Stove without back boiler
    This will be going into a room that is 5.4 x 5.4 m and has 9ft (2.8m) ceilings giving a volume of 82m3. Again I want to know how many BTUs or kW I need for this room

    Any help would be appreciated


Comments

  • #2
    sydthebeat
    Subscribers Posts: 42,171 ✭✭✭✭sydthebeat


    this old chessnut again :)

    this is what DEAP says

    A3.5 Estimating the required boiler size



    While DEAP should not to be used to size the heating system (this is usually up to the system designer or heating system supplier/installer) the following method can be used to estimate the required heat system power output. Note that sizing the heating system is not the responsibility of SEI and is entirely between the client and the assessor or system designer.



    Maximum recommended dwelling heating load: Expressed in kW.


    For dwelling heat load, the maximum space heat demand is calculated by multiplying the heat loss coefficient by the desired maximum temperature differential (deltaT usually -1 to 21 degrees C). The heat loss coefficient is the heat loss in W/K of the dwelling when accounting for fabric and ventilation losses. The heat loss coefficient is called the "Total Heat Loss" in the DEAP. 2 to 4 kW should be added to the space heating demand for water heating depending on occupancy or floor area.



    The total of space and water heating requirement should then be multiplied by 1.1 to account for distribution losses giving the following maximum recommended dwelling heating load:



    Dwelling space and water heat requirement (W)
    = dwelling space heat loss + dwelling DHW requirement

    = Total Heat Loss*22 *1.1 + 4000*1.1


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