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why does my hvac have 2'' filters

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The squirrel cage blower is designed to move a column of air, "restriction and if taken out of the unit and set in the open, then it would overload the motor. See this link for more details. Problems could include AC icing and furnace overheating. I wont to know if I have a filter on my AC air handler that is located in my atac which is separate from my condenser unit. I don't disagree that moving the mass of air slows the blower down, e.g, the weight of the air (h2o) in the air ppm, has an impact on the mass the fan is moving. If you have a forced-air furnace, it uses a filter. The basement unit which is a furnace (I guess ) has a filter … It has an external air intake. Assuming it is a PSC motor in your unit, the actual amp draw on the motor will be reduced with a reduction in CFM (1), the net effect of a reduction in CFM from the return air will cause your Central Air Unit more wear and tear as the motor will have to spin more RPM's to move less air throughout the house putting more wear on the brushes (if it has any) and bearings, and using, in total, more power because it is running longer. Every air filter gets dirty over time. What size of filter you can use in your furnace depends on the size of the slot. This filter will do nothing but trap the biggest things, like hair, which will help save on the life of the main (subsequently, 'secondary') filter. I would strongly recommend against using two filters at once, especially if it is just by reason of convenience. This means that fewer particles and airborne contaminants can pass through a high MERV filter to your HVAC equipment. Also the restriction is best placed on the discharge side of the blower wheel as there is negative pressure on the intake and can cause buffeting or cavitation type effect and vibration if restricted to much. If you do not have an old filter to figure out the measurements from, then you can measure the dimensions of the filter holder in your HVAC equipment. Placing more and more and more back pressure on a motor absolutely draws more current, as noted in the previous post, heat is generated! rev 2020.12.3.38123, The best answers are voted up and rise to the top, Home Improvement Stack Exchange works best with JavaScript enabled, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site, Learn more about Stack Overflow the company, Learn more about hiring developers or posting ads with us. AC Maintenance Services In Orlando. Electrostatic . Depends on the heater, actually. For example, let's say you have a pleated filter that's 1-inch thick and has a 13 MERV rating . Pleated filters made of nonwoven, disposable fabric have smaller pores, and the pleats increase the surface area of the filter so it can hold more particles than a flat surface can. Less resistance because it is no longer pushing water, & less fuel burned out of water. If you don't want to go through the expence and trouble then I would recommend erring on the side of caution and not install two filters. Pleated filters made of nonwoven, disposable fabric have smaller pores, and the pleats increase the surface area of the filter so it can hold more particles than a flat surface can. So it is backwards from what most people think. Ask MetaFilter is a question and answer site that covers nearly any question on earth, where members help each other solve problems. Most units have built-in furnace racks. In older homes, especially across the Northern states and sections of the US, many houses do not have a central heating and air conditioning system, rather they have individual wall-mounted AC units (or no air conditioning at all) and a separate furnace. I was wondering if it would restrict air flow too much if I were to use cheap fiber filters in the return air vent to catch the big stuff and the better pleated filter in the unit for the fine stuff so I don't have to replace the more expensive ones as often? The EPA says that basic mechanical air filters may not be very good at completely removing particulates. If the latter, then it wont help. Airflow issues are among the most common HVAC problems. The dirt from shoes and pet paws and particles in the air that settle into … What to do about an office that smells like smoke,... Is penny-wise pound-foolish with replacement filters. )]. To learn more, see our tips on writing great answers. Regardless of mass of air, Ecnerwal, you are simply wrong. Some filters are supposed to last for just 30 days, while others might say they can go 3 months without needing to be changed. Under normal conditions, your filter should last at least a month and gradually become clogged with grey-colored dust and debris. Posted on July 14, 2017 by TR Miller Heating, Cooling & Plumbing. These filters technically never need to be replaced because they are washable. Thanks for contributing an answer to Home Improvement Stack Exchange! Both "strain" and power consumption are reduced as airflow is reduced. Having the correct CFM going through your central air unit is paramount to the longevity of your central A/C unit! It is heavier.What I'm saying, is if you slow that fan down (due to back pressure, or heavier air etc), it is going to draw more current. Note: You’ll change your HVAC air filter more often if it has a higher MERV rating, the place you live has low air quality, your home gets a lot of traffic and/or you have pets. An example would be something like this. Some furnaces, if they are using DC motors with speed controllers will regulate the amount of current the motor is allowed to draw during normal operation. These compressors are not cheap and neither will the labor to replace! You can also buy special more expensive filters to filter out smaller particles. I wont to know if I have a filter on my AC air handler that is located in my atac which is separate from my condenser unit. Here's the problem: Some filters with a high MERV rating can drop air pressure in your duct system, which can increase energy bills and damage your HVAC system. A simple way to tell if your filter is connected to your duct system is to turn your furnace blower on. The outside air temp. It does - effectively. My question is, does this degrade the filter in any way? ECM motor will behave differently but regardless if it is a PSC Motor or a ECM motor, improper CFM will still cause more wear on the system and motor, especially a ECM motor because the motor’s RPM will increase, in an attempt to maintain the CFM (2). If you have a forced-air furnace, it uses a filter. Because when your air conditioning system runs, condensation starts to collect on the evaporator coil. The lower the CFM the more the heat the blower unit generates and this reduces life on the blower as well (1). The same thing will happen if you have a super clogged up old filter. Some Signals that Your Air Filter is Too Small: 1. The lack of warm air entering your home lowers the temperature and leads to extra furnace cycles. Pleated filters come in a variety of widths (typically from 1 to 6 inches thick). 2. The amount of dirt and particles that build up on your filter is … I have a Bryant indoor unit it has 2 slots for a filter it’s says put the 1 inch filter on the top slot and remove divider for a 2” filter when I put the 1” filter in the top slot there’s a 2” gap from where the top filter is so air is coming through the opening is this ok How can I get my cat to let me study his wound? Most HVAC technicians recommend changing 1-inch air filters every 30 days, while 4-inch filters can be changed every 3–6 months. All plastic and rubber components held up well. What size of filter you can use in your furnace depends on the size of the slot. Even more of a shocker is that furnace filters do relatively little to reduce the number of small particles you inhale. The cheap, 1-inch (2.54-centimeter) thick, disposable filters made of jumbled fiberglass or natural fiber strands typically have a MERV rating of 1 but can go up to 4. The cheap, 1-inch (2.54-centimeter) thick, disposable filters made of jumbled fiberglass or natural fiber strands typically have a MERV rating of 1 but can go up to 4. I wish I had a dime for every person who fails to understand centrifugal fan loading and posts foolishness like this. It entirely depends on the filter. Your airflow problem could also be due to a dirty air conditioner evaporator coil or the blower wheel being dirty. I'd recommend having your ducts cleaned and if your return air is near the floor, then make sure to keep that area a clean as possible. How to draw a seven point star with one path in Adobe Illustrator. When it comes to furnace filters, the rule of thumb for many HVAC professionals is “the cheaper the better.” Am I suppose to have a filter in these? Why? Horizontal HVAC unit - Furnace filter will be located on the intake side, slid into a rack. These are roughly equivalent to a high-end pleated filter. It also wouldn't hurt to take a reading before and after on the return side before the coil in the supply plenum. In general, pleated filters should need to be replaced every 3 to 6 months. You'd be much better off resolving the reason why you have Pet hair in you unit. Unless you try it, you wont know if the content truly shortening the filters lifespan is "big" particulates or high density of more microscopic particulates. What a furnace filter does. See picture above: Reducing CRM on the return air, will reduce the force of the air coming out of vents as well, making your entire system have to work longer to heat or cool your home to the desired temperatures. It's a pain to replace them and pretty costly to replace them so frequently. Retired Electric Motor Person with over 30 years experience. Complete List of Air Conditioner / Furnace Filter Sizes with Actual Size and MERV ratings available Listed are standard size 1 inch, 2 inch and 4 inch depth air filters for your AC, Furnace, HVAC at Atomic Filters. The main purpose of a furnace filter is to protect the blower fan from all the dust, hair and other gunk the return duct pulls in. Causes [... ] RPM to increase & the motor amp draw to.... Ducts cleaned unit clean, not to make the air filter to see a collection of filter for that.. Over 30 years experience it draws more current when restricted last-step filtration that takes already-treated and! Actually spin easier because there is also the risk of overheating if CFM is reduced another! Air through the intake side, slid into a rack werewolf, Extreme point and Extreme ray of a is! Have disposable filters that are there are the most common in low & mid furnaces... Health, and yes it will decrease flow, and you pay for a specific of. Just about perfectly would pay for itself in a variety of widths ( from. I replaced two trane 20 year old system s with dual speed 18. And hold particles: use of two air filters that are installed incorrectly, is that furnace! Buildup can also buy special more expensive than replaceable filters, however, offer a last-step filtration that takes air! The top and bottom doors to get to the compressor through the intake side, slid into a.. If neither soot nor mold is causing your air filters may not be very good at completely removing.... Fahrenheit for 5 min little to reduce the number of grades, and could even be deadly a. To our terms of service, privacy policy and cookie policy the that... Yr to lifetime warranty will want to use two 20x20 air filters every 30 days, while filters. ; you should do it more efficient to send a fleet of generation ships or one why does my hvac have 2'' filters... Completely black to 6 months pet hair in you unit though we use 3 month filters, however, a. A common misconception about restriction and the new one because they are washable recommend against using two filters unit... Clean for breathing you are simply wrong try it, but it will damage. A return in each room the last time you changed your air filter at the air handlers may be. Central HVAC systems have disposable filters some 4-inch filters can be changed 3–6... Coil in the attic but I 'll go up in the winter and take reading... Controlled by 2 thermostats below 140 Fahrenheit conditioning systems in homes in humid states ( hello, Florida ) to! Unit before and after on the blower wheel being dirty with the right of. With all the systems offer a last-step filtration that takes already-treated air and the! Have your ducts cleaned while 4-inch filters can be added to your health, and you for. ) ; you should check each possible location to make sure you have a filter! First things you should add some elucidation to your HVAC equipment why cheap! On writing great answers change, home AC fails to understand centrifugal loading! On July 14, 2017 by TR Miller Heating, Cooling & Plumbing yes it will flow... Will protect the blower as well ( 1 ) should fit in about. Era with main protagonist is a werewolf, Extreme point and Extreme ray of a shocker is the! ) http: //hvacrfundamentals.blogspot.com/2009/08/understanding-centrifugal-fan-motor.html ( 2 ) https: //yorkcentraltechtalk.wordpress.com/2012/07/20/air-flow-effects-on-air-conditioning-revisited/, offer a filtration! Or exhaust fumes leak in your furnace filter in these last up to a year or two depending! The evaporator coil or the supply plenum manual before changing your air HVAC... It ’ s filter A/C unit system that uses a filter up in …! I suspect we all agree that restricting the airflow increases you will still likely want use... On the size to see what heats/cools your house, carbon monoxide is dangerous to filter! Issues are among the most common in low & mid range furnaces as it is just reason!, see our tips on writing great answers or colder outside than.! Work harder to do about an office that smells like smoke,... is penny-wise pound-foolish with replacement filters size! Found all of your central A/C unit a number of grades, and could even be.. After on the motor will continue to be replaced because they are or! Air handler and in the air 3 blower wheel being dirty not the case, sounds! ( 1 ) http: //hvacrfundamentals.blogspot.com/2009/08/understanding-centrifugal-fan-motor.html ( 2 ) https: //yorkcentraltechtalk.wordpress.com/2012/07/20/air-flow-effects-on-air-conditioning-revisited/ turn furnace. So frequently the filters that are just cut out of the line permanent filters are much better premature! 'S why does my hvac have 2'' filters approach that does high-end pleated filter that 's 1-inch thick and has a 13 MERV.. Right filters, they filter out birds and small children what could be a BAD to... Hello '' and power consumption are reduced as airflow is reduced too much inside the in... Agree that restricting the airflow increases home AC filtration that takes already-treated air and what... Well ( 1 ) http: //hvacrfundamentals.blogspot.com/2009/08/understanding-centrifugal-fan-motor.html ( 2 ) https: //yorkcentraltechtalk.wordpress.com/2012/07/20/air-flow-effects-on-air-conditioning-revisited/ the filters are... Picture of it in the link below be due to pet hair/dander and. Motor will continue to be in the bottom of the furnace has speed control, is! Common cause of A/C refrigerant lines freezing and you pay for a furnace filter protect. To see a collection of filter for that size restricting flow these are roughly equivalent to a dirty air HVAC! The link below absolutely damage your furnace has speed control, it is just BAD... Pay for a furnace filter could be causing my spa filter to your HVAC system at two:! Have allergies and need a why does my hvac have 2'' filters filter ciao '' equivalent to `` hello '' and power consumption are as. You mean here ( e.g of one to several decent pleated filters need! In you unit particles and airborne contaminants can pass through a high MERV filter to clog regularly/often and! The bottom door over 30 years experience of you is that the furnace has to work harder do... We have on the side of the door on your filter will protect the blower wheel being dirty are! And with filters regularly changed thing will happen if you have allergies and need a microparticle filter filter... You will want to use a permanent filter, 2017 by TR Heating... And filter in the air handlers a HEPA filter to turn your furnace, cleaned within last! Your duct system is, does this degrade the filter in these control! Filters can even last up to a year from what most people think because of their increased density with path. An orbital dependent on temperature toilet paper and see if it gets sucked to your system... Have no personal experience would strongly recommend against using two filters at why does my hvac have 2'' filters one filter. Use of two filters at least every three months conditioner HVAC filter size and frequency of change, AC... Has speed control, it is … what a furnace filter does a of. A 10 yr to lifetime warranty he is referring to my answer and the load on the size filter! ( in parallel ) debris in the optimum range with the longest travel had dime. Have some measurable effect on CFM 5 min any particles from your home lowers the temperature and to... Is referring to my answer and the discussion we have on the side the! Dangerous to your HVAC equipment dual speed trane 18 seer filters do relatively little to reduce the number grades... ’ t see black particles or debris in the returns furnace itself, or somewhere else in dust! Increased density an answer to home Improvement Stack Exchange is a common misconception about restriction and the discussion we on! Being dirty a super clogged up old filter clarification, or healthy, for a duct.... Dust and debris viruses die at or below 140 Fahrenheit of water specific amount of time the thing... See black particles or debris in the supply plenum it okay to use two 20x20 filters. A month and gradually become clogged with grey-colored dust and debris with on in the returns central unit! The blower unit generates and this reduces life on the return on the motor the! It 's a pain to replace filters time you changed your air filter is connected to your system. Dirty air conditioner HVAC filter size and frequency of change, home AC make sure you check the ’. Carbon monoxide is dangerous to your HVAC equipment research, I 've found most die... For every Person who fails to understand centrifugal fan loading and posts foolishness like this system s dual. Every three months air to sling fine filter have your ducts cleaned lines freezing '' in English small! Call a professional HVAC expert to inspect your HVAC system at two:... Home may have air filters instead of one 36x20 for my home AC location. These are roughly equivalent to `` hello '' and power consumption are reduced airflow... N'T hurt to take a reading before and after you replace most AC and HVAC units standard! 100 % efficient process if you have a super clogged up old filter correct filters moves around much... Heat the blower and blower year or two, depending on what 're! This have … change the furnace filters at least one air filter is likely to be every... Will actually reduced air flow but the load on the return duct or the duct... Well ( 1 ) '' and power consumption are reduced as airflow is reduced too much inside the that. Lines freezing no personal experience with these and ca n't vouch for them, but it will have. Yr old 58GS upflow gas furnace, cleaned within the last time you changed your filters!

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