Spring Newletter

Summer Newsletter  Issue #3 Summer 2010


Three Steps you should take to reduce moisture in your boat or RV.


Boating and RV season is in full swing and its time to uncover and rediscover your pride and joy. Not so fast:
Humidity Problems?
Want to come home to a fresh smelling Boat?
Want to protect all that fine woodwork from high humidity?
Here are three steps you should be taking to reduce humidity in your boat or RV.


Step 1
The Quick Fix: Ventilate, Ventilate, Ventilate

For immediate results, ventilating hot humid air from the interior to the exterior and replacing it with fresh, dry air form the outside is the quickest and best way to reduce the humidity, and concentrations of pollutants, and mold spores, and micro organisms in your boat or RV.
This is easily achieved when you are underway and you can open port and hatches on the windward to allow fresh, clean air intake, circulation and exhausting out on the leeward.

However, for other times use exhaust fans to vent air outside.  Use fans to circulate the air inside the cabin.

Compared to the air in your boat or RV, outside air is less humid and can quickly reduces the relative humidity inside your boat or RV. Likewise outside air is less polluted (has lesser concentration levels) of mold spores, odors, and other pollutants.
Of course you can't always ventilate (since you don't want to lose your conditioned; air cold or warm), for such situations use a boat or RV dehumidifier.   Whenever, possible ventilate, ventilate, ventilate. The objective is to keep your interior dryer and less polluted.
Moisture control is key to mold control.

Step 2
Long term maintenance: Employ the use of a marine type dehumidifier in your boat or RV

For long term usage, or for those times that you can't ventilate a boat or RV dehumidifier will help reduce the humidity in you boat or RV.

If moisture is the enemy then a dehumidifier is your ally. A dehumidifier works by removing

humidity from the air and draining the condensate that collects, out through a suitable drain or bilge.

The dehumidifier creates a low humidity environment in your cabin that inhibits the growth of mold and

mildew. With a dehumidifier it is not necessary to have a continuous source of fresh, outside air.

The use of a dehumidifier is an ideal substitute to your AC Unit especially in an unoccupied boat or RV. In short it is more economical and efficient than using your AC unit.

 

see also  mold prevention program in your boat or RV, for a long term maintenance program.

 

A dehumidifier allows you to set a desired relative humidity in your boat or RV. 

At levels between 50% RH and 60% RH most moisture related problems can be reduced.  see additional usage table for a marine type dehumidifier at the end of this article

 

Step 3
Reduce the sources of moisture in your boat or RV.

Dry out carpeting, sails, cushions, life jackets and other equipment before storing these in your boat.
Cooking and bathing generates considerable amounts of humidity in your boat or RV.

Therefore, employ the use of exhaust fans or hatches in the galley and head. I don't know why manufactures

don't install more exhaust fans. Perhaps they don't realize that moisture is the number one cause

of odor, mold and mildew in boats and RVs. If your head or galley doesn't already have an exhaust,

consider installing or retrofitting an exhaust fan. Even if you can't install a fan consider installing a

hatch or such like, that can opened while you are cooking or bathing.

A good source of exhaust fans for RV Owners can be found at:

Jcwhitney
http://www.jcwhitney.com/RV-Ceiling-Fan-Vent-Install-Kits


or
http://www.jcwhitney.com/autoparts/Product/

RV Part World
http://www.rvpartworld.com/categories.php?catID=248


Camping World
http://www.campingworld.com/



For boat Owners:

West Marine has a good selection you can find it here
http://www.westmarine.com



For a complete mold prevention program in your boat or RV see or mold prevention program.


 

Recommended Usage Table for your boat and RV dehumidifier.

If you have employed the use of extensive fine wood flooring, paneling, trim, cabinets and furniture in your boat or RVs interior, you will want to keep your humidity levels between 50% RH and 60% Rh. At levels lower than 50% woodwork may become dried out with extended usage.

 

Usage

Application
For applications of 1000 sq feet or less

How?

 

Marine and RV Dehumidifier Usage

 

 Galley, laundry, head, berth

Protect your valuable investment and equipment. 40 - 50%RH

Improve your personal comfort by removing that "caramel apple" sticky humidity from your environment. 60% RH

Store your equipment such as sails, PFDs, electronics, bedding, towels, in a low humidity environment you create.

40 - 50%

Reduces harmful levels of humidity that contribute to corrosion, rust, mold and mildew that thrives in humid and damp environments.

 

Reduces condensation and dampness on cold walls and surfaces during mild weather by removing naturally occurring moisture.

Control Humidity

Kitchens, bathrooms, laundry room, living spaces 50 - 60% RH

 

 

If you have employed the use of extensive fine wood flooring, paneling, trim, cabinets and furniture in your boat or RVs interior, you will want to control the humidity. Wood absorbs and looses moisture. At a high humidity level wood absorbs moisture and expands and contouring may occur. At a low humidity woodwork may become dried out and contracts and cracking in seams may occur. 50% RH - 60% RH

 

 

Small crawlspaces, small basements, and cellars. 50 - 60% RH

(Less than 1000 square feet)

Reduces naturally occurring moisture and moisture generated from cooking, bathing, washing

 

Use your dehumidifier to keep your humidity levels between 50% RH and 60% RH. At levels lower than 50% woodwork may become dried out.

 

 

 

 

 

 

 

 

Reduces the humidity or dampness that permeates through the floor, walls, cracks, seams etc.

Protect Your Valuable Investment and Equipment

Please note: that their are other agents of deterioration that must be considered when storing your collections or equipment. These agents include visible light, ultraviolet radiation, temperature, dirt, etc. which may affect your environment.

Storage and utility rooms for electronics, equipment, memorabilia, keepsakes, books, tapes, photos etc.

see table below

 

Furniture, sails, PFDs, electronics, bedding, towels 40 - 50% RH

 

Construction trailers, Field Offices

Reduces harmful levels of humidity that contribute to corrosion, rust, mold and mildew that thrives in humid and damp environments

 

Use your dehumidifier to

Create a low humidity environment/room for storage

 

Reduce Condensation Boat and RVs, campers, pop ups
50 - 60 % RH
Reduces condensation and dampness on cold walls during mild weather by removing naturally occurring moisture.

Improve your personal comfort

 

 

 

 

 

 

Improve your personal health

 

Campers, Pop Ups, RV’s

Mobile homes, Field Offices, Attics

60 % RH

 

 

 

 

Living spaces, cabins, basements, crawlspaces.

 -Less than 1000 sq feet
The EPA recommends a setting between 30% and 50% RH to decrease mold growth.

Reduces naturally occurring moisture and moisture generated from cooking, bathing.

 

Prevent Condensation and dampness on cold walls

 

Some people are allergic to mold, mildew and bacteria, which thrive in damp, humid environments.  By reducing the humidity in the air you help to prevent their growth.

Restore Freshness

Rooms, Cabins, Campers, Living Space
30% and 50% RH to decrease mold growth.

Musty odors are caused by mold and mildew growth. Inhibit their growth by reducing the moisture they need to thrive on.

Relative Humidity Optimum Ranges for Various Materials as Recommended by the National Park Service for their Park's Museum Collection.

Please note: that their are other agents of deterioration that must be considered when storing your collections or equipment. These agents include visible light, ultraviolet radiation, temperature, dirt, etc. which may affect your environment. This guide only addresses relative humidity levels as recommended by the NPS for their collections.


Paintings..................................................................40% - 65%
Paper ......................................................................45% - 55%
Photographs/Film/Negatives ...................................30% - 40%
Other organics (wood, leather, textiles, ivory).........45% - 60%
Metals.....................................................................<35%


 

For a complete mold prevention program go here.  You'll find a Dehumidifier Program for the prevention of mold and mildew growth in your boat or RV.

 

Dehumidifier for boat and RV
Model:  DH-10

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

bulletA compact, light, dehumidifier specifically designed for Boat, RV, Industrial and Special Applications
bulletCabinet: Powder coated steel cabinet with an all stainless steel base
bulletColor: the paint is a neutral beige color
bulletCapacity: 10 ppd
bulletSize: Height: 12.5", Width: 12", Depth: 15.5"
bulletHorsepower: 1/6
bulletWatts: 150       Volts: 115 AC
bullet See all details, features and specifications

 

Discontinued:  Please note that the McIntire Company no longer produces the DH-10 Dehumidifier.  If you would like a dehumidifier similar to the DH-10 we recommend the

Dry Pal manufactured by Mermaid Marine http://www.mmair.com/marine_division/dehumidifiers/dry_pal_dehumidifier

Dry Pal PictureDry Pal

or the

 

CD30

CD30 Manufactured by EbacUSA http://www.ebacusa.com/cd30.htm

 

 

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