Courtesy of the EPA (http://www.epa.gov/)
There are many sources of indoor air pollution in any home. These include combustion sources such as oil, gas, kerosene, coal, wood, and tobacco products; building materials and furnishings as diverse as deteriorated, asbestos-containing insulation, wet or damp carpet, and cabinetry or furniture made of certain pressed wood products; products for household cleaning and maintenance, personal care, or hobbies; central heating and cooling systems and humidification devices; and outdoor sources such as radon, pesticides, and outdoor air pollution.
The relative importance of any single source depends on how much of a given pollutant it emits and how hazardous those emissions are. In some cases, factors such as how old the source is and whether it is properly maintained are significant. For example, an improperly adjusted gas stove can emit significantly more carbon monoxide than one that is properly adjusted.
Some sources, such as building materials, furnishings, and household products like air fresheners, release pollutants more or less continuously. Other sources, related to activities carried out in the home, release pollutants intermittently. These include smoking, the use of unvented or malfunctioning stoves, furnaces, or space heaters, the use of solvents in cleaning and hobby activities, the use of paint strippers in redecorating activities, and the use of cleaning products and pesticides in house-keeping. High pollutant concentrations can remain in the air for long periods after some of these activities.
These guys are great. They show up on time and stay until the problem is fixed. Very reasonable pricing
Zac came to Midlothian to fix our 28 year old A/C, which hadn't run in 2-4 years. Only had to replace one part, done in under an hour. Was very courteous and helpful. Would use them again in a heartbeat!
We've been using Allenaire Service Co. since 1991, and have found their service consistently excellent and their pricing very reasonable.
OMG I can not begin to tell you how wonderful these people are. We have been using them for seven years now. Gary, Steve and Kim are absolutely the best. Very personable and understanding people. They are punctual , and do amazing work. As someone said, they don't leave until it is done. Their pricing is affordable. I highly recommend using them.