Dehumidification >> Wet Crawl Space Dehumidification Vs. Ventilation

While the kiln described in this publication is designed for simple operation, you will still need to closely monitor the drying process. Monitoring the moisture loss and quality of the wood during the drying process will help you maximize the efficiency of the kiln. Simply explained, when drying lumber you want to dry fast enough to prevent stain and long drying times, yet slow enough to prevent checks Wet Crawl Space Dehumidification Vs. Ventilation and other drying defects. 

The prevalence of certain defects is influenced by the species, thickness, moisture content, and drying conditions. Monitoring the moisture content during the drying process is important to avoid drying too rapidly (which results in quality loss) Wet Crawl Space Dehumidification Vs. Ventilation and to know when the load has reached the desired moisture content. 

Measure the sample boards daily to determine the daily rate of moisture loss. This loss should be compared with the safe drying rate for that species (see Figure 7 for hardwoods). If the drying rate is too fast, Wet Crawl Space Dehumidification Vs. Ventilation then it may be necessary to increase the relative humidity setpoint of the dehumidifier or turn two of the four fans off. 

Lumber should be dried to the maximum safe drying rate without exceeding the daily loss. The safe drying rate refers to the moisture loss in one day, Wet Crawl Space Dehumidification Vs. Ventilation not the average loss over several days. Figure 7 lists the safe drying rate for common one inch thick North American hardwoods. Softwoods are typically able to dry at a much faster rate and moisture content losses above 10 percent per day are quite common. 

When lumber is at its highest moisture content, Wet Crawl Space Dehumidification Vs. Ventilation it is important to adhere to the safe drying rate. Most unwanted checking and splitting in drying lumber occurs as the wood loses the first one-third of its moisture content. Once the lumber dries below 22 percent moisture content, the risk of creating new cracks and splits is low. 

Dry lumber for interior use to a moisture content of six to eight percent for most areas of the country. This will limit the amount of dimensional changes that would occur when the wood is processed Wet Crawl Space Dehumidification Vs. Ventilation and in service. Lumber used for exterior purposes is usually dried to 12 to 15 percent moisture content. Softwood lumber used for framing is commercially dried to 19 percent moisture content. 

However, fewer building defects would result if softwood framing lumber were 5 dried down to 12 percent moisture content. For information on drying schedules Wet Crawl Space Dehumidification Vs. Ventilation and schedules for specific species and thicknesses, see the reference to the Dry Kiln Operator’s Manual and the Dry Kiln Schedules for Commercial Woods: Temperate and Tropical. 

In measuring the rates of moisture loss, it is impractical to weigh every board in the kiln and electric meters are not accurate above 30 percent moisture content. Therefore, Wet Crawl Space Dehumidification Vs. Ventilation the sample board method should be used to determine the moisture content of lumber in the kiln. This method uses short, carefully chosen sample boards sawn from larger pieces of lumber and these sample boards are weighed periodically and estimated moistures are calculated. 

Since the wettest or slowest drying lumber in the kiln has the highest risk of splitting and cracking, the sample boards should represent this kind of lumber. Use samples from the most recently cut wood, the widest and thickest boards, Wet Crawl Space Dehumidification Vs. Ventilation lumber with the most heartwood, and boards that are quarter sawn whenever possible (see Appendix C: Procedures for Cutting and Using Sample Boards). 

Select a few boards from the stack of lumber that represent the slowest drying material. These would be the widest, thickest, Wet Crawl Space Dehumidification Vs. Ventilation and highest moisture content boards. Boards that contain the most heartwood or are quartersawn are also suitable. 2. Cut a 24 to 30 inch sample that is free of knots and at least 12 inches from the end of the board. 

Then cut two one inch sections from the sample board as shown (see Figure A). Make sure to number the sections Wet Crawl Space Dehumidification Vs. Ventilation and sample board. 3. Immediately weigh the one inch sections (accuracy of about one gram required) and record the weight. Measure immediately after cutting since it is important that they do not gain or lose weight before weighing. 

4. End coat the sample board with a roofing cement or commercial end coating (see Figure B). Now, Wet Crawl Space Dehumidification Vs. Ventilation weigh the sample board and record the weight on the sample (accuracy of 0.1 pounds). 5. Place the sample board in the lumber stack in a location where it will dry at the same rate as the rest of the lumber in the dryer (see Figure C). 

6. Place the one inch sections in an oven 215ºF to 218ºF (102ºC to 103ºC) and dry– usually 18 to 36 hours depending on the oven. Reweigh Wet Crawl Space Dehumidification Vs. Ventilation and obtain the oven dry weight. 7. Calculate the moisture content of each section and average the moisture content (MC) of two sections to obtain the moisture content of the sample board. 

8. Estimate the oven dry weight of the sample board using average moisture content and weight from step #4, and record this so it can be used for future moisture content calculations. 9. To determine the moisture content at any time, Wet Crawl Space Dehumidification Vs. Ventilation reweigh the sample board and calculate. Treatment and disposal of large amount of produced water is a considerable economic and environmental burden for oil and gas industry. 

On the other hand, for many remote areas with shorting of clean water supply and enriched with oil/gas production such as New Mexico, Wet Crawl Space Dehumidification Vs. Ventilation purified produced water could be a valuable water source for beneficial uses. The goal of this research is to purify produced water at wellhead, yielding water clean enough for beneficial uses like drilling, stimulating, or water flooding. 

A new concept of produced water purification by Humidification-dehumidification (HD) process was developed in which low-temperature energy sources, Wet Crawl Space Dehumidification Vs. Ventilation such as co-produced geothermal energy or solar energy, could be used to drive the water desalination process. 

The system contains humidifier where produced water meets with flowing air for evaporation and dehumidifier for clean water creation and collection. The unique feature of this process is that co-produced geothermal energy or Wet Crawl Space Dehumidification Vs. Ventilation inexpensive solar energy could be deployed. In addition, direct internal heat transfer has greatly enhanced latent heat recovery.

Mold And Mildew

The so-called cellular slime mold and mildew, a unicellular organism that may transition into a multicellular organism under stress, has just been found to have a   read more..

Derechos Tornadoes And Cyclones X

The rain produced by the newer storms reinforces the cold pool, strengthening the inflow of air from the back side of the developing storm complex and encouraging the downward transport of higher momentum air from aloft. These processes can enable the system Wind Damage Derechos Tornadoes And Cyclones X to attain a nearly steady-  read more..

Flood Management Methods

Stand away from, Flood Damage Flood Management Methods not under,the sag. (Under a doorway is safest.) Poke a hole in the ceiling at the edge of the sag so any trapped water can begin to drain. Do not start at the center of the sag because the ceiling may collapse suddenly.

Rescue the Most Valuable Items Find and pro  read more..

How To Report A House Being Used As A Meth Lab

As a result of these limitations, it is necessary that the employer evaluate glove selection and use to prevent employee exposure as Meth Lab Cleanup How To Report A House Being Used As A Meth Lab specified in 29 CFR 1910.132(d). Guidance on conducting in-use testing methods for glove selection is available.8 Direct Reading Patches/Charcoal Felt Pads I  read more..

Flood Damage

So your tenants moved out without notice about Tenant Move Out Cleanup Flood Damage. So your tenants of moved out and upon inspecting the premises after they moved, you find water all over the floors. First step is, call a professional water restoration company. Let them deal with your insurance company as they know how to   read more..

Natural Disaster Cleanup

One of the biggest challenges after a natural disaster is the proper and timely management and disposal of disaster debris. Debris Removal Natural Disaster Cleanup could include waste soils and sediment, downed trees, building rubble, and other personal property, and could be a combination of a variety of bio hazardous wastes.  read more..

Roofing Removal Tips

Assess weight-based rather than volume based payment for debris collection and investigate whether such systems could be efficiently linked to debris payment accounting systems. Management Comments and OIG Analysis FEMA generally concurs with all of these recommendations, but notes that the Age  read more..

Certifications For Asbestos Pipe Removal

Analytical Procedure: A portion of the sample filter is cleared and prepared for asbestos fiber counting by Phase Contrast Microscopy (PCM) at 400X. Commercial manufacturers and products mentioned in this method are for descriptive use only and do not constitute endorsements by USDOL-OSHA. Similar p  read more..

How To Check If My Property Has Ever Flooded

Concrete retaining walls can be constructed to withstand a large variety of structural loading conditions. They are particularly useful in steep situations where protection is needed close to the top or Flood Damage How To Check If My Property Has Ever Flooded base of a slope. 

The strength of the retaining w  read more..

Radon Transform

RADON TRANSFORM MITIGATION STANDARDS 1.0 BACKGROUND The 1988 Indoor Radon transform Abatement Act (IRAA) required the Environmental Protection Agency (EPA) to develop a voluntary program to evaluate and provide information on contractors who offer radon transform Radon Mitigation Radon Transform control services to h  read more..