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  1. #1
    We are planning two new rooms, adding to our 9-window all-brick colonial two-story in northern VA. The first is a kitchen addition erected atop an existing patio slab with footings, 14X24, with windows on two adjoining out sides and the two opposite walls are the brick of the home. The 2nd is a new MBR/Bath/WIC over the 22X25 garage, raising the roof to the 2nd story of the original home. We plan a french door/frieze glass on the bedroom wall, opening onto the new kitchen flat roof to be used as a sun porch. From the existing furnace/AC to new MBR must be a run more than 35ft; the new kitchen NMT l5ft. Thought about hydronic heating&cooling system embedded in new kitchen slab, but understand cooling not recommded in humid climates (we are!). Request your expert advice on most comfortable way to heat/cool the two new rooms. Thanks in advance. AEB



  2. #2
    Join Date
    Aug 2002
    Location
    Office and warehouse in both Crystal River & New Port Richey ,FL
    Posts
    18,836
    What type systems do you currently have?If they are older,might be able to replace with larger system and add ducts to the addition.

    Are the master and kitchn both on the second floor?

  3. #3

    reply to Dash

    Current HVAC is 3yo TRANE 95% efficient gas/AC system sized for existing house (3400sf). New 330sf kitchen will be on ground floor atop existing patio slab. 530sf MBR/bath/WIC will be above garage in add-on second story, both under 8f ceilings. Thx Dash. AEB

  4. #4
    Join Date
    Aug 2002
    Location
    Office and warehouse in both Crystal River & New Port Richey ,FL
    Posts
    18,836
    With the two rooms being close it might(duct system space)be possible to do the additions with one system and a 2 zone systems,so you have a stat in each one to controll the temperature.

    It's unlikely that your existing system is large enough to handle the addition,but worth getting a load calculation done for it,whenthey do the calculation for the addition.

    Existing might be able to handle the new kitchen,and use a heat pump for the master BR,with ducts in the attic.


    I wouldn't start work ,or order floor trusses,etc.,until space for the ducts and equipment are confirmed.

  5. #5
    appreciate your reply, and will share it with my architect to adjust the truss design as needed.

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