In addition to asking how to change a home air filter, many homeowners wonder how to properly insert a furnace air filter. Although on the surface the answer might seem idiot-proof - just take the old one out and put the new one in - it's sufficiently confusing to address here. You see, there is a definite wrong way to insert a home air filter that can hamper your furnace’s efficiency and cost you money (see Can Putting the Air Filter in Your Furnace the Wrong Way Damage It?). Running your furnace with a clogged filter can have a similarly negative effect. Clean air filters matter. It's important to routinely monitor them so that, when they become clogged with all the dirt, dust and debris that they filter out of the air you breathe, you can respond with a clean filter for better indoor air quality and improved energy efficiency. When the air filter is clogged, your furnace will strain harder to remove these contaminants, increasing your utility bills and shortening your HVAC equipment’s life.

Just like a car's air filter, a dirty furnace filter starves the engine in your furnace for air. In fact, a government study indicates that replacing a dirty, clogged filter with a clean one can lower your central air conditioner's or furnace's energy consumption between 5 and 15 percent. >> Here's how to choose the best furnace air filter. By the way, if you aren't sure exactly when to change your filter, invest in an electronic air filter monitor. can you recharge portable ac unitsIt will eliminate all guesswork on your part.central air conditioning units prices canada Ok, so you have realized that now is the time to change your air filter. outdoor hvac unit making loud noiseYou have the new one in front of you and the old one still in the furnace.

1.  On your new filter, find the arrow that indicates the proper air flow direction. This tends to confuse everyone more than anything else. That arrow must always face toward the furnace and away from the return duct that carries the air in need of heating or cooling. Forced air furnaces recirculate air throughout a home: pushing air (cool or heated) in and pulling spent air back in for another cycle. Tip: It’s a good idea to draw the airflow direction arrow with a permanent marker on the actual furnace housing or ductwork. Ideally, you'd indicate the airflow direction and filter size (16x25x4  Airflow→) 2.  Slide the new filter in with the arrow pointing toward the furnace, and you are done. Here's a helpful 1:42 minute video from Liberty Homes titled Home Maintenance: How To Change Your Furnace Filter which reviews air flow direction and how properly to insert your home air filter. Replacing your air filter is not difficult as long as you understand that air flows from your ducts, through the filter, and into the furnace.

The arrow on the filter always should point toward the furnace. What have you found most helpful when you last changed your furnace filter? How did you ensure you were inserting it properly? Let us know so others can learn from you.What AC unit size do I need for a 2,600-square-foot home? A 2,600-square-foot home needs a four-ton or five-ton air conditioning unit, depending on the climate zone in which the home is located, according to AC 4 Life. Homes in the Southwest or South need five-ton air conditioners, while other zones can use four-ton units. How can you test the capacitor on your home air conditioner? The size of an air conditioning unit is calculated by dividing the unit's BTU rating by its BTUs per ton. It is important not to buy an air conditioner that is too large for a given space. A unit that is too big will short cycle and cycle on and off repeatedly, resulting in reduced system life, increased operating costs and a failure to dehumidify the space. A ductless air-conditioning system is an air-conditioning unit mounted on the inside of a wall to deliver cool air into the room or on the outside of the h...

Attaching a thermostat to an air conditioning unit has no electrocution risk due to the low voltage used, but some heating systems use wires carrying a pot... What brands manufacture commercial air handlers? How do you find coupons for different home and garden shows? How do you melt aluminum cans at home? Who sells As Seen on TV air purifiers? How do you find home construction floor plans? HVAC Design - Air Return Have a Carrier gas furnace, model CNRVP3014ATAABAA, that is supplying a two story home (800 down / 1200 up) with respective air return sizes of 14x14 and 20x20. The owner complained of excessive noise from the air return......which I agree is loud. The unit is housed in the laundry romm on the second floor with the return going directly to an adjacent wall that separates the laundry room and hallway. The 20x20 air return is the only one upstairs that has to take care of 3 bedrooms plus the addtional rooms up there. While I am no HVAC contractor it seems like this was a bad design.

Re: HVAC Design - Air Return Jeff in the 40 years I spent working in that field lack of and or inadequate return air was the most common flaw that I observed on any system. When trying to explain return air I like to use the bottle approach one can only blow so much air into a bottle and when the bottle get full it starts to whistle and makes noise. Increase the size of the return or get some ear muffs Originally Posted by jhaynes I have heard of 200 sq. in. per ton for air returns Haven't heard the 200 sq in/ton before but have seen this many times.....That unit appears to have a 2.5 ton coil installed and therefore would need 1000 cfm. Decent (unlined) duct design for 1000 cfm would require 160 sq in (8"X20") on supply and 196 sq in on return (8"X24"). From your #'s, the returns are oversized (576 sq in) and the noise being heard must be fan or vibration; should not be velocity noises from too small ducts. There may not be any duct liner (sound absorbing insulation) installed in the returns, allowing the fan sounds to be carried easily to the hall/rooms.....especially if the return ducts are short.

EDI: EIFS-MA TX # 39 2008 US Member of the Year National Association of Commercial Building Inspectors & Thermographers� Member ID 12011-14TX Originally Posted by badair That would be correct the surface of the return air grill means absolutely nothing, Its what's behind the grill that has to be caluclated. you could have the whole wall covered with a grill and connect it to a 6 inch duct and wait for the noise "a two story home (800 down / 1200 up) with respective air return sizes of 14x14 and 20x20" When he didn't say "air return grilles or registers", I assumed he meant the return duct sizes. Originally Posted by Brian A. MacNeish That's why I posted my dimensions for clarification from him and you gurus...we taught you better than too *****-u-me anything out of this motely crew... 20x20, at least the filter is that size lengthmaybe 5 - 6 inches at best Sounds like it's not too small returns but...... 20X20" is a standard size for many plenum take-offs from the HP/AC unit.