Most people don’t realize what negative pressure is and how it affects them. Negative pressure can be caused by a handful of factors. Most of the major ones can be avoided, but for the others you may need a little help from Four Seasons.
What is Negative Pressure?
A home that has good ventilation will have an equal pressure between the outdoors and indoors. When air is pushed out of the home by force, the home acquires a negative pressure balance between the indoors and outdoors. The outside air then enters your house any way it can. When you open a door does the air rush into the house? Well that is one of the signs of negative pressure. Air will creep in through windows, doors, outlets, and any gap that may exist in the home. Cold air leaks in the winter will diminish the furnaces ability to keep the home warm, and hot air leaks during the summer will diminish the air conditioners ability to keep the home cool. Both of these add up to higher utility bills year round!
Back-Drafting and Your Safety
This condition can be mild or severe. In a severe case, you need to be aware of any cold air around your furnace or water heater. This could indicate that your furnace or water heater is back drafting when it off between cycles (You might notice the fireplace back drafting on cold days as well). While your furnace is running the exhaust is leaving your house through the chimney. When it shuts off the negative pressure inside the home sucks any fumes around chimney back down it. This could bring large amounts of dangerous combustion gases back into your home. A proper venting system is key to prevention of this problem, and if you suspect that your home may be vulnerable, call Four Seasons as soon as possible.
Source of the Problem
What causes negative pressure inside the home? Fans and blowers that draw air out of your home are some of the biggest culprits. These appliances include your furnace, bath fans, clothes dryers, whole house fans and range hoods. When these appliances are running they remove air from the house, but most homes don’t have anyway to make up for the loss of this air. There in lies the problem. By limiting the amount of time bath fans and kitchen exhaust fans are on, you can counteract some of the consequences of negative pressure.
Fresh Air Exchangers
However, for many well insulated homes, this action is not enough to solve the negative pressure problem. What can you do? Call Four Seasons! Lennox makes a fresh air exchanger that can remove this problem in your home, and Four Seasons can install it. This system is hooked up into the existing duct work that your furnace and air conditioner use, and it exchanges the air in the home with the fresh air of the outdoors without diminishing the HVAC systems ability to keep your home comfortable. This will eliminate negative pressure indoors and improve the air quality in the home as well! So, if you are tired of your home being negative, call Four Seasons!