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.

Limit Radon Exposure

Applications can be submitted at any time. The Agency processes Applications on a first-come, first served basis. However, the selected measurement device, the status and availability of EPA radon chambers, and other factors may require additional time when processing Applications for analytical mea  read more..

Fire Damage

When your tenants have been careless and they may have caused a Tenant Move Out Cleanup Fire Damage, who do you turn to for help? Expert fire and water damage restoration services are an outstanding resource of Tenant Move Out Cleanup Fire Damage and restoration information of your personal possessions. Local fire restoration businesses offering this ki  read more..

Tips On Cleaning A Hoarders House

Still, we don't look for history of child abuse in ants, discuss ant toilet training, or accuse ants of character flaws and laziness. And we don't imagine that ants are crazy or that their problems are all in their heads because, after all, these are ants. But if "mentally ill" isn't accurate, what   read more..

Asbestos Siding

Asbestos Removal Asbestos -containing siding was a common building material in Maine during the middle part of this century. The exterior siding material is durable and cement-like and much less likely to release fibers than other Asbestos -containing materials like pipe covering and Asbestos Abatement Asbestos Siding   read more..

Remove A Sewage Smell From Inside A Home

What are Biosolids? They are nutrient-rich organic materials resulting from the treatment of domestic sewage in a treatment facility. When treated and processed, these residuals can be recycled and applied as fertilizer to improve and maintain productive soils and stimulate plant growth.2) What is t  read more..

How To Clean A Meth Lab House

This document is designed to assist property owners, certified meth cleanup contractors, and state andlocal authorities with their efforts to reduce exposure to contamination from former drug labs ininhabitable properties as defined in KRS 224.01-410. The guidance is based on current informatio  read more..

Sewage Cleanup

Occasionally there are homeowners that complain about Odor Control Sewage Cleanup from their onsite sewage backup. Although many people understand that sewage cleanup has a particular odor, there are steps that can be taken to limit these sewer odors in the home and yard. Gases from an onsite cleanup could be a pro  read more..

Determine The Size For A Dehumidifier

Reverse osmosis, alternatively, is based on membrane technology. Using a high-pressure pump, seawater is forced to flow through a membrane. The membrane only allows freshwater to pass while filtering out the dissolved minerals. Freshwater is produced as a result of this filtering with any previously  read more..

How To Sand And Remove Lead Paint

What is Lead? Lead is a metal that can be found in sources such as paint used in homes built before 1978, soil,water and old painted furniture and toys. Approximately 38 million homes in the United States still contain lead-based paint. Four million of these are home to one or more young childr  read more..

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 lu  read more..