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post #11 of 16 Old 4 Weeks Ago
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Re: Insulating top of ice box

You can insulate the bottom of the cover using 2-part foam insulation. Make a form and pour it in. Once it sets, you can shape it and coat it with epoxy and maybe a layer of glass mat.
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Re: Insulating top of ice box

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Originally Posted by SchockT View Post
I am surprised ambient fridge temp is enough to create condensation on the exterior, even with poor insulation.
I'm not, especially if it's an older boat in a warm, humid climate.

My Tartan 37 has fridge doors that are made of wood. Period. No additional insulation. A previous owner glued some 1/2" foam to the inside of the doors, which helps some, but they're still noticeably cold.

I didn't think of this till now, but if there is room you may be able to add some foam to the inside of the doors. Or possibly make new doors that are foam cored. Assuming you have a similar situation to me.
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post #13 of 16 Old 4 Weeks Ago Thread Starter
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Re: Insulating top of ice box

There is insulation on top part of the icebox but likely not much. The condensation is on the counter top surface and yes, itís Florida. Evaporator plate is in just below the counter top. I will see if any insulation can be added inside but condensation is all over that area. The door seal is decent.

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Re: Insulating top of ice box

For what its worth, we made a flexible inner "cover" out of Reflectix. A portion extends over the top of the evaporator to the back of the box while the balance extends over the contents to the front of the box and can be rolled back as necessary to access the contents. The benefit of this approach is that one does not need to cool the empty space above the contents when the box is only partially filled so a snugly fitting cover keeps the "cool" where it's needed. A couple of layers of Reflectix glued together and then to the underside of the lid/cover is also quite helpful. The foregoing solved our condensate problems on the lid surface here in southwest Florida.

FWIW...
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Re: Insulating top of ice box

Quote:
Originally Posted by krisscross View Post
There is insulation on top part of the icebox but likely not much. The condensation is on the counter top surface and yes, itís Florida. Evaporator plate is in just below the counter top. I will see if any insulation can be added inside but condensation is all over that area. The door seal is decent.
Is the evaporator plate actually touching the top surface of the box? If it is then that would certainly explain how cold the countertop is getting. Evaporator temp is much lower than ambient box temp. Adding spacers so there is a gap between the plate and the top of the box will not only improve your condensation problem, it will also increase the efficiency. If you have an air gap, the warmest air, which, of course, rises to the top, will be able to circulate across the top of the plate. If you do have an air gap there already you want to make sure that frost build up has not bridged that gap, creating a conduit for the evaporator to suck heat out of the top of the box.

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Re: Insulating top of ice box

Evaporator box is not touching the upper insulation layer but the gap is small, maybe 3/8 of an inch. No frost there.
I will look up that Reflectix insulation.
Thanks for all your input. Very helpful.

Be kind, for everyone you meet is fighting a hard battle.
Plato
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