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Installing air conditioning in 356 / 36

Discussion in 'Big Boats' started by karellen, Feb 17, 2018. Add this thread to a FAQ

  1. karellen

    karellen

    Joined Jan 5, 2017
    25 posts, 2 likes
    Hunter 356
    US Benicia
    Hello,
    We're considering installing air conditioning in our 356 in preparation for a future cruise to Mexico. I was wondering if anyone had pictures of the factory install to help as a guide. I see some of the ductwork left by the factory, but wondering how it goes through the lockers, where the compressor is mounted, etc.

    Thanks!
     


  2. Jerry Clark H356 SV Persi

    Jerry Clark H356 SV Persi

    Joined Mar 3, 2003
    614 posts, 41 likes
    Hunter 356
    US Grand Rivers
    dsc01769.jpg dsc01774.jpg thru hulls.jpg Unit factory installed was made by MarineAirr now owned by domestic and is 16,000 BTUH water tonair heat pump.
    Unit is located under the aft saloon seat with blower end toward starboard. This is just forward of the wall separating the kitchen cabinet and dining area. Flex duct is routed under saloon seat that parallels hull to starboard locker in Vberth area and then vertically to T that connects grill in bulkhead that distributes air to the saloon back toward the stern and to the Vberth through a small rotating nozzle diffuser facing forward.
    Back at blower, T off to the master cabin behind refrigerator/freezer and range to starboard toward locker in master cabin. Route duct vertical up in locker and install a rotating bezel diffuser in the stern wall of the locker.
    Cut a hole in the bottom of the bulkhead separating the under seat compartment where you locate the unit facing forward and install a return air grill and filter.
    Just aft of the galley and to starboard is a removeable hatch with a plastic insert. The pump for condenser water is located just forward of that compartment and has it’s thru hull located in conjunction with all just at the bottom of the companionway. The discharge condenser water is located in the starboard hull above the waterline 12 to 18 inches.
     


  3. karellen

    karellen

    Joined Jan 5, 2017
    25 posts, 2 likes
    Hunter 356
    US Benicia
    Thank you Jerry for the detailed write-up and pictures. Very helpful!! My boat without AC has a board in place where the compressor is, it looks like the Dometic unit is sized to fit perfectly where that board is. The good news is that it seems their new ECD series shares the same dimensions.

    If possible, could you take a picture of the vent routing in the aft and forward lockers?
     


  4. Jerry Clark H356 SV Persi

    Jerry Clark H356 SV Persi

    Joined Mar 3, 2003
    614 posts, 41 likes
    Hunter 356
    US Grand Rivers
    I’ll be glad to. I’ll be on the boat in the next few days and will post them. One thing you should do is run your condensing pan drain over to the shower sump pump st the base of the companionway stair and with the thrust hulls. The standard drain is into the bilge.
     


  5. seadaddler

    seadaddler

    Joined Dec 19, 2006
    5,328 posts, 109 likes
    Hunter 36
    US Punta Gorda
    Hi
    Hunter stop putting sump box in my 2007 H-36 and maybe some day I will add one to keep my bilge dry.
    Nick
     


  6. Jerry Clark H356 SV Persi

    Jerry Clark H356 SV Persi

    Joined Mar 3, 2003
    614 posts, 41 likes
    Hunter 356
    US Grand Rivers
    I have a wet bilge all the time Nick. Only time it is dry is when I vacume it out and it only stays that way a few days. I don’t know where mine gets water from. My bilge pump leaves a couple of inches in it from the water in the hose that never gets out.
     


  7. Jerry Clark H356 SV Persi

    Jerry Clark H356 SV Persi

    Joined Mar 3, 2003
    614 posts, 41 likes
    Hunter 356
    US Grand Rivers
    43AB7B9E-5C79-4A1C-BD66-0E27B078412B.jpeg 43AB7B9E-5C79-4A1C-BD66-0E27B078412B.jpeg 7E9C3C0C-7103-437E-B308-832F03861C50.jpeg 7E9C3C0C-7103-437E-B308-832F03861C50.jpeg 7ED0D0A2-92A9-43FD-8D1E-9FFE3636A4CC.jpeg Here are the photos I promised. The front duct rises behind the locker (there is a real plywood panel at the back of the starboard front locker in the vberth. It terminates at the top compartment into a plastic plenum with a (looks like) 3 inch duct exiting forward to a round rotainting diffuser in the Vberth. The plenum has a a rectangular diffuser shooting aft over the starboard settee.

    The locker to starboard in the rear berth enters through the bottom of the locker and exits facing aft, about 6 inches below the CO detector, with a rotating bezel diffuser. I didn’t measure the diameter but it is the same size (guess is 3 inch) as the Vberth diffuser with the same diffuser.

    See photos below. First ones are in the rear berth, last are in Vberth. Hope this clears it up for you. If you need more info, pm me. 159A75B5-105F-4CFC-AB55-F8F3A7317294.jpeg AE109409-4404-4A4B-ADAE-866AA0D24E20.jpeg
     


  8. Jerry Clark H356 SV Persi

    Jerry Clark H356 SV Persi

    Joined Mar 3, 2003
    614 posts, 41 likes
    Hunter 356
    US Grand Rivers
    Sorry about the double photos. Did an edit and got extra photo! Thought best to leave it rather than try to edit it out.