Build a cleaner fire this winter season

Woodsmoke contains fine particles
that may affect your health.

It's not just during the holiday season - all winter long, families and friends will gather around fires in woodstoves or fireplaces.

But how you build that fire – and what you burn – can have a significant impact on air quality and health, both inside your home and out.

Whether you’re using a woodstove, pellet stove, or your fireplace, seeing smoke from your chimney means your fire isn’t burning efficiently or cleanly as it could.

Woodsmoke contains fine particles – also called fine particle pollution or PM2.5  -- which can harm the lungs, blood vessels and heart. People with heart, vascular or lung disease, and older adults and children are more at risk.

Here are some simple tips for building cleaner-burning fires this holiday season:

• Burn only dry, seasoned wood. Wet, or green logs, create excessive smoke – and waste fuel. How do you tell if wood has been seasoned? Listen for a hollow sound when you strike two logs together.
  
• Wood burns best when the moisture content is less than 20 percent. You can purchase a wood moisture meter to test the moisture content of your wood before you burn it. You can purchase these meters for as little as $20 at most home improvement retailers.
  
• Start a small fire with dry kindling, then add a few pieces of wood. Be sure there’s space between the pieces of wood – and give the fire plenty of air until it’s roaring.
  
• A smoldering fire, “dirty” glass doors on a wood stove, or smoke from the chimney are all signs that your fire needs more air – or the wood is too moist.
  
• Never burn household garbage, cardboard, painted or treated wood, or any wood that contains glue, such as plywood or particle board. These items release toxic chemicals when burned -- and if you’re using a woodstove, they can damage it.
  
• Check your air quality forecast on airnow.gov before you burn. Some local areas limit woodstove and fireplace use under certain air quality conditions.

If you heat your home with wood, using an EPA-certified wood stove can help you save wood while putting less smoke into the air.

In January 2014, the agency proposed updates to its requirements for newly manufactured wood heaters that will make new woodstoves, outdoor wood boilers and other wood heaters cleaner in the future. EPA anticipates issuing final requirements by Feb. 3, 2015.

Source: EPA

Concerned about smoke and chemicals in your home? AllerAir offers a wide range of indoor air purifiers for the home and office, with a complete air filter system containing activated carbon, HEPA and UV (optional). Contact AllerAir for more information and speak to an IAQ expert to find the right air purifier for your needs.

Combined wood and tobacco smoke exposure increases risk and symptoms of COPD

People who are consistently exposed to both wood smoke and tobacco smoke are at a greater risk for developing chronic obstructive pulmonary disease (COPD) and for experiencing more frequent and severe symptoms of the disease, as well as more severe airflow obstruction, than those who are exposed to only one type of smoke, according to the results of a new population-based study conducted by researchers in Colombia.

"Although previous studies have shown a definite link between wood smoke exposure and the development of COPD, those studies were case-controls and case series of patients with similar disease or health profiles," said study lead author Carlos Torres-Duque, M.D., director of research at the Fundacion Neumologica Colombiana in Bogota. "This new data derives from a population-based study that looked at wood smoke exposure and the overall prevalence of COPD, as well as the characteristics of the disease and those who suffer from it."

About 40 percent of the world's population uses solid fuels – especially wood – for cooking or heating, he noted.

For this study, Dr. Torres-Duque and his colleagues used data from the PREPOCOL (Prevalencia de la Enfermedad Pulmonar Obstructiva Crónica en Colombia) study which evaluated the prevalence of COPD among the adult residents of five Colombian cities. The study included 5,539 subjects, 8.9 percent of whom were diagnosed with COPD. The study participants were divided into four groups: those who were exposed to wood smoke and who had never smoked tobacco (30.9 percent); those who were exposed to tobacco smoke but had no exposure to wood smoke (18.7 percent); those who had been exposed to both types of smoke (29.8 percent); and those who had exposure to neither type of smoke (20.6 percent).

Patients' lung function was measured using spirometry, a technique used to measure the amount of air a person is able to inhale and exhale, and all patients completed a standardized respiratory questionnaire to identify exposure to smoke.

In their initial review of data, the researchers learned that 53 percent of those diagnosed with COPD had both wood and tobacco smoke exposure; moreover, the prevalence of COPD increased as exposure to wood smoke increased.

After adjusting for specific factors including age, active and passive tobacco smoking, education level, history of TB and altitude, the researchers found that wood smoke exposure of 10 or more years posed a significant risk factor for developing COPD in both men and women and those with both wood and tobacco exposure had poorer lung function scores and more phlegm and coughed more frequently than those who had exposure to only one type of smoke.Among the COPD population, those who were exposed only to wood smoke tended to be women, to have higher BMIs and to be shorter than those exposed to tobacco smoke or to a combination of wood and tobacco smoke.

"In the population we studied, exposure to wood smoke was identified as an independent risk factor for developing COPD, both in women and men," Dr. Torres-Duque said. "In addition, the prevalence of COPD was significantly higher in those who were exposed to both wood and tobacco smoke and those with both exposures had more symptoms and more severe disease than those who were exposed to only one type of smoke."

This result suggests that the combination of wood and tobacco smoke produces an additive effect that causes an increase in COPD prevalence and in the frequency of COPD symptoms, he added.

"It is also possible that the responses of the lungs and airways could vary, based on the pollutants to which they're exposed," Dr. Torres-Duque noted.

Future studies might provide additional data regarding varying responses and help clinicians determine specific treatments based on exposures, he said.