But, contrary to expectations, it is possible to keep your house cool during the summer months without using air conditioning. And very typical. It was almost 100 degrees here in Cleveland on Saturday 7-7. Heat rises is one part – temperature stratification. As proof, I showed you a 3 degree difference on my house between the first and second floors due to a well insulated and air sealed attic. Problems YOU May be Creating That Prevent the AC From Keeping Up with the Phoenix Heat . There is likely nothing wrong with your system. Keep your shades, blinds, or curtains closed during the hottest part of the day. Air Conditioner Can't Keep up. Since 2013, we’ve executed some pretty wild projects you can check out in the case studies, but more importantly, I wrote a book about what we’ve learned. I wrote a book about what we’ve learned. Fans keep the air circulating and produce a small cooling effect. Be sure to note areas in your home that are particularly … c.src="//static.hotjar.com/c/hotjar-9183.js?sv=3"; They are thermal bridges, allowing a lot of heat to pass through them and not the insulation. They need building science. On hot or humid days, you might see a little puddle of water under your condenser unit. There are 2 parts to the solution: This is about R-6 to R-9. It’s like wearing a spring jacket on a 20 below day – it just doesn’t cut it! Don't have a timer? We have received dozens of calls from homeowners frustrated with their a/c’s limited capacity to keep up with the heat outside. The solution isn’t to call your AC guy and complain. During the warmest part of the day, close your window blinds and keep out the sun. - YouTube Learn about a few new technologies that can help you beat the heat and save money. Air conditioners don't dehumidify well if they don't have long runtimes, and remember that heat waves don't last forever and we don't have bad ones every year. Why I Don’t Like Spray Foam In Existing Home Walls, Which Indoor Air Quality Monitors Are Best And Why, My Air Quality Stinks – But Now We Can Measure It – Porch Paint, VOCs, and Ventilation, 4 Steps to Buy Clean Renewable Electricity for the Same Price as Dirty Electricity. info@EnergySmartOhio.com, Posted @ Monday, September 17, 2012 3:28 PM by, Posted @ Monday, September 17, 2012 7:26 PM by Nate Adams, Posted @ Monday, May 06, 2013 1:26 AM by Steve Dune, 1890 Ranch – Habitat For Humanity Deep Energy Retrofit, 1900 Deep Energy Retrofit – Hiram College Tree House, 1918 House of the Future in Cleveland Heights, 2016 Two Story With Tiny Furnace in Hinckley, some pretty wild projects you can check out in the case studies. f.hj=f.hj||function(){(f.hj.q=f.hj.q||[]).push(arguments)}; There was an error submitting your subscription. More to come on air leakage in a minute. Here is what the reverse stack effect looks like in summer. This attic hatch actually had 3 hatches over a stairwell, the top had no proper cover, the middle that you can see below also had no cover, then there was a door at the bottom. Open your windows at night. Plus, note the bathroom fan in the foreground and the recessed light in the background (the metal hump). My home’s AC cant keep up with the heat!”. (function(f,b){ You pay the company with the service contract to come check it out every year, shouldn’t it keep things cool? The first chapter is available free here: It's free! No? Radiant Energy (with a side of convection and conduction), 2. Regardless of whether your house was built in 1835 or 2012, you have air leakage in a holey ceiling. Here are a couple pictures of roofing temperatures, 120 and 130 degrees. It's such an assumption that people living in hot climates need air conditioning (A/C), that most people don't think twice about switching it on. Radiant Energy Layman’s Definition (Jargon Demystified!) The puzzle is more complex than I used to think. George Brazil Air Conditioning & Heating serves the entire Phoenix metro area. Why can’t it do its job? I’m going to dig pretty deep here, so here we go! The air to replace it comes from the basement. If you have air-conditioning units, they'll have to work that much harder to lower the temperature the more heat that enters through your apartment's window. Did it keep up? Blown insulation does a better job here. The Best Window Air Conditioners for Your Home It may seem like a waste of energy to turn your A/C on and off, but doing so actually saves you a fair amount of money, Amann says. Does your A/C work fine when you first start the car but then fail after a while, especially on hotter days? The Home Comfort Book will help you avoid wasting thousands chasing symptoms by teaching you what root causes to problems are. Yuck. We shifted Energy Smart to a more comprehensive process that involves diagnosing a home first, then making changes based on what the house needs to solve the problems clients come to us with. These are both holes in the ceiling. You might crank your AC way down to 65F so the room will cool faster. If your air conditioner can’t keep up with the heat, there are a few reasons—and some remedies, of course. Halogen Bulbs Are REALLY HOT! Temperatures peak in an attic in late afternoon or evening, when the sun has been beating on them the longest. I sweated just thinking about going outdoors. This goes for heating as well – if you’re using the air conditioner to heat the home in winter but it’s blowing cold air, check the mode on your controller. This article is getting older. It is essentially a chimney for air to move through. This large hole around a plumbing stack (the black pipe) went all the way to the basement. This is a good way to save energy over the course of time. If anything seems odd, such as your dog panting excessively, contact your vet. Any internal heat like an oven or stovetop will put a strain on your air conditioner, making it much less efficient. (That’s hot for us Midwesterners, folks in Lousiana probably think we’re wusses.) Your a/c is not designed for 100 degrees. Adding more insulation helps keep the hot AZ summer out of your home. Air conditioners remove heat from the air and constantly circulate the air in the home. Now check your email to confirm your subscription and download, © 2016 Energy Smart Home Performance, Inc. All Rights Reserved. Now that you understand the theory behind your uncomfortable attic, let’s dive into the practical part – how you actually fix it! Terrible cook. Even if you have a newer home, until 2008 Ohio code was only R-30 (now it is R-38 here), like this: This addition from about 2004 has R-30 fiberglass batts. Non-IC lights are usually older and found in 1960-1980 homes, but they are still made and (gasp) installed today because they are $5-10 cheaper than a good one. Leave your poor air conditioner alone! A well insulated and air sealed attic will reduce temperature stratification, but why? This is a recessed light not rated for insulation contact (non-IC). Success! We’ve covered these tips numerous times before, but make sure you’re: It’s one thing for your AC to not keep up on really hot days. – In the winter, heat rises in your house and exits in the attic, just like a smoke stack. Which brings us to: Thermal Bypass (More Jargon Demystified!) 7. Then heat is leaking in. How to Improve Central Air on Upper Floors. These extreme temperatures are caused by the sun’s radiant energy. So what do you do? Here’s some reasons why your AC unit just isn’t keeping up with the summer heat. Those only have an R-value of 6 or 8, depending on whether they are 2×6 or 2×8. A thermal bypass can be a recessed light, plumbing stack (or poo pipe as one of my customers called it), ceiling fan, light fixture, chimney, attic hatch, open wall cavity, or any number of other things. (Probably. But if you’re experiencing an uncomfortable home all the time, you might have a more serious problem. A comparison. Once applied, here is what you get: This is the first story of my house on an interior wall. It is called reverse stack effect in summer. HVAC (heating, cooling, and ventilation) also plays a large role. Not bad for an 1835 house! This is not enough to keep the heat out of the 2nd floor! On a 100-degree day, your attic could be up to 140 degrees. If you've got blinds or curtains, keep them closed on hot, sunny days to conserve energy. Keeping the bills and mercury down. I wrote it when I was an insulation contractor. Check on your dog often. })(window,document); “HELP! Let’s take a look at your options. It simply is NOT designed to. Viewed 23k times 4. Cook outside on hot days. The higher the temperature outside, the harder your air conditioner has to work. When the sun is beating down on your house throughout the day, the inside of your attic can reach astronomical temperatures. The Home Comfort Book will help you avoid wasting thousands chasing symptoms by teaching you what root causes to problems are. I sweated just thinking about going outdoors. I’ve since learned about HVAC as well (heating, ventilation, and air conditioning). Keep the Sunlight Out . 1. It is also seriously dangerous to go in an attic at 4 or 6 PM. Poor Attic Insulation. Meanwhile, was your air conditioner cowering as well? c=b.createElement("script");c.async=1; Continue to Next Step. Next, make sure you’re doing everything you can for your air conditioner. The Department of Energy recommends R-49 up to R-60 for our climate zone in Northeast Ohio. This is the largest potential hole in my ceiling, but at 89.4 degrees it is only .4 degrees hotter than the wall below it. Like I said This article is getting older. (I don’t have air conditioning. How to make an air-conditioner for really hot days? 140-150 happen in poorly ventilated attics sometimes. Sometimes it needs a recharge or your ductwork is leaky and/or inadequate.). The front grill should be kept free of dust and lint to permit free air flow to the condenser. In the summer, the hot air from the attic pushes into the house, letting hot, muggy air in and roasting your second floor in the process. Regular stack effect makes a lot more sense than the other way around, reverse stack effect is a little confusing, hopefully I can make it make sense. If your AC can't keep up when it's hotter than normal outside, use the advice above to make it through. And on really hot days in Phoenix with temperatures over 110°, your AC might run constantly without being able to cool your home off. Did it keep up? Meanwhile, was your air conditioner cowering as well? Hot summer days can make your car feel like a sauna on four wheels. Get started on the first step in understanding and diagnosing your home's issues. This house had major comfort problems on the second floor, even though it had R-19 in the attic. It’s just plain bad. If your unit is already running full time to keep the house at 76°, moving the dial down will not make the house any cooler. What the heck! Just in time for you to come home from work and notice the house is REALLY hot. There really isn’t an upside. The humid air that is being exhausted may be too heavy to completely vent out. Changing Halogen Track and IKEA Lighting to LED Bulbs (GU4, GU5.3, MR16 base). If your home is older, it probably doesn’t have enough insulation in the attic. If your air conditioner is trying to hold 70 degrees, that is a 60 degree difference it is trying to make up for with only a few inches of insulation trying to stop the heat. Please try again. Also do not leave the room without removing the cloth from the fan. But that's not how air conditioning works. Keep it clean. I also have a 1″ foam board cover over the Attic Tent. Heat flows towards cold, and since the inside of your house is cold relative to the attic, the 120-140 degree attic air pushes into the house and out through the basement. It can't even keep the temperature constant, it will creep up into the 80s even while running. Note the blue light coming through 3 holes in the white can. HVAC has a large effect on comfort. This way, your air-conditioner will stay off while you're at work but will automatically turn on during your commute at 5:15 p.m., cooling your apartment in time for your return. Your air conditioner can help to keep a room ventilated as well. Here are a few actual examples of air leakage. For example, say you leave your apartment at 8:15 a.m. each day and get home at 5:45 p.m. Before you leave, set the timer for nine hours. Many homes experience 10-15 degrees per story. (That’s hot for us Midwesterners, folks in Lousiana probably think we’re wusses.) Fix: Sometimes when an air conditioner runs nonstop to keep up with the heat, the evaporator coil freezes over. Radiant energy is essentially unseen light, but you feel it when you walk out of the shade into the sun. Be careful to set the wet cloth only on the outer cage part of the fan so that it cannot be caught by the fan blades. Most of us, including me, cowered in our houses like there was a blizzard outside. These leak like sieves. A chimney outside the chimney! Contact a Phoenix air conditioning contractor for more help. I head for the finished basement!). The solution is to air seal your attic and add more insulation. This hole went all the way to the basement. This means that I only have a 3 degree rise in temperature from my first to second floor. The reason why your air conditioner can’t keep up with the 100-degree heat wave will not make you happy. Place a wet face cloth on the fan to produce a mini air-conditioning effect. As summer stretches into the hottest months of the year, your air conditioner might be straining to keep your home cool, causing you … Make buying a new furnace, air conditioner, or heat pump less stressful. Why can’t it do its job? If you can't sleep through the night because you're too hot, you may not have to stay in your bedroom. f._hjSettings={hjid:9183, hjsv:3}; It’s not its fault! If your car does not have air conditioning, leave your dog at home when it is extremely hot outside. It bothered me. Scot, one of my employees, was a trooper finishing up in an attic. Seal your air ducts. The vent should not be vented up through the ceiling. Cold air is denser and falls naturally. I wrote it when I was an insulation contractor. The second one was on a 90 degree day recently, about 11:30 AM. I have pull down stairs to access my attic. Plus it allows a ton of moisture to transfer into your attic, which can cause mold. If that’s what you’re experiencing, here are 2 things you can try to combat this problem: You AC has to remove any heat that makes its way into your home. Check out the chart on energy.gov for info on how much insulation your attic should have. Serious building scientist. However, no higher than 84 degrees. – Radiant energy only travels in one direction and does not need matter to transfer through,  like convection (gas and fluid) and conduction (solids). At 89 degrees, it is almost 3 degrees hotter than downstairs. Air leakage is bad. b.getElementsByTagName("head")[0].appendChild(c); Your new recessed lights stink too. After coming home from a long day at work, you step in only to be slammed by a thick wall of stale 90F air. So here are some tips to keep the heat outside. That 130 degree air is trying to get into your house! It’s just physics. It may seem counterintuitive, but on hot summer days, opening the windows will often make your home warmer, not cooler. Much of the heat that makes its way into your home comes through your windows. It was almost 100 degrees here in Cleveland on Saturday 7-7. Ask Question Asked 5 years, 3 months ago. Temperature Stratification & Reverse Stack Effect. Note the fact that you can see wood studs. On very warm days, watch your dog's condition closely. We tend to notice these issues more during the extreme summer heat. Use your car’s air conditioner to keep the temperature of the moving car under 75 degrees. The first chapter is available free here: The sun beats on your roof, which radiates that heat into the attic. If your house is hot, try to spend time during mid-day some place that has air conditioning—for example, go to the shopping mall, movies, library, senior center, or a friend’s house. Air conditioning keeps you cool on hot summer days but uses a lot energy. Time to find the root cause; your air conditioning not keeping up is actually a symptom of energy leakage. – a hole through your attic ceiling that leaks air from inside your house to the outside. If you feel you must keep your air-conditioning running while you're … This is on the second floor of my house, right below the attic hatch, which is often a hot area. The second part is reverse stack effect, or heat also goes to cold, which is what happens when hot attic air and radiant energy push into your living space through air leaks and thin insulation. And on really hot days in Phoenix with temperatures over 110°, your AC might run constantly without being able to cool your home off. LED ones aren’t. Thermostat Settings On a warm summer day – say 85-98 degrees, we recommend you turn your thermostat up when you leave for work. It may not be the equipment’s fault: Leaky ductwork, poor insulation levels, and air leaks in the home’s envelope all contribute to comfort issues. Put your hand on the side of the unit near where the filter is. Note the dark fiberglass insulation, a surefire sign of air leakage. In hot, humid weather, that’s normal, as long as it only forms while the unit is working. Success! Don't sweat it. The Department of Energy recommends R-49 up to R-60 for our climate zone in Northeast Ohio. Keep this vent CLOSED always. Here is what the winter stack effect looks like. Temperature stratification has been whipped into submission! It causes drafts in the winter and muggy spots in the summer. These chemical compounds are responsible for keeping you cool on hot summer days, in air-conditioners and refrigerators. The higher the temperature outside, the harder your air conditioner has to work. We just rented a condo and our A/C cannot keep up so it will run almost constantly. var c; Keep a portable drained: If you’re using a portable air conditioner, it most likely has a little light that will indicate when the water reservoir needs to be drained. I love Attic Tent pull down stair covers, they do a fabulous job stopping air leakage. This is looking straight down the hole next to a chimney in a 1950s house. Here are some quick tricks to keep it cool on hot days. It lets cold air inside in the winter and hot air inside in the summer. Some people even leave it on all day and night when it's hot. Look for an email from me (Nate Adams) to download the guide. Air conditioning units have two parts: one inside your home and one outside of it. Heat also goes to cold, though. A window letting in the hot sun won't just heat up your thermostat, it'll heat you up too. Too often, I heard that problems hadn’t been solved. It should be 2-3 degrees hotter per story. Because I know a guy who will do it cheap, I have about R-80, or about 2 feet of cellulose in my attic. And even though you might not have heard of … Reverse Stack Effect (Jargon Demystified!) I wrote about it in Confessions of an Insulation Contractor. What the heck! Limit your use of the oven. In fact, when the blower door was turned on in this house it sucked black dirt from the attic in and stained the ceiling. Put your hand by your attic hatch on a hot day, is it hot? You can test this by dropping the temperature to 16°C on a hot day to check if the air from the air con feels cool before you switch it to an optimum level such as 24°C. A fan in the inside unit blows air through the chilled evaporator coil, cooling your house, via air ducts.Meanwhile outside, the compressor, condenser coil and another fan vent the hot air coming off the refrigerant. This is counter-productive to cooling. While it seems abnormal for your house to be 77 … How to keep your car cool on hot days. Those same leaks that let cold air out of your ducts let warm air into your home. Active 8 months ago. It is 86 degrees. Whether your room is 70F or 90F, the AC unit pumps out the same "strength" of cool air. Energy consumption rises by up to 30 per cent in the Northern Territory's hottest months. ... into the room. No? Some options to help include: ENERGY STAR estimates that the average home loses 20% to 30% of the air that passes through a home’s ducts. The sun and fire are the best examples. Keeping upstairs rooms adequately cooled in summer puts the homeowner up against a basic fact of physics: Hot air rises. Most of us, including me, cowered in our houses like there was a blizzard outside. George Brazil Air Conditioning and Heating provides the Phoenix area with, Keep more of the heat outside of your home, Make sure your air conditioner is running well, Using black-out curtains, shutters or blinds. If you ever had a warehouse job, you know that when you get close to the ceiling in a Wal-Mart or factory, or any other large building, it gets hot on the ceiling, often 20-30 degrees hotter than on the floor. That’s not quite the whole story, though. In cool weather—usually, 60 degrees or less—an air conditioner can freeze up, causing the unit to leak water when it melts which is also normal. This way, the AC doesn’t … Note the air escaping through recessed lights, the attic hatch, and so forth. Let's check the power supply. 3. A lot. '' of cool air a hot day, close your window blinds and keep the... Is beating down on your house throughout the day, is it hot stovetop will put a on. ’ m going to dig pretty deep here, so here we go cause ; air! Problems hadn ’ t have enough insulation in the winter and hot air rises way down to 65F the! Leave it on air conditioner can't keep up on hot days day and night when it 's free my house right. Mini air-conditioning effect cool on hot days ) went all the way the. 2 parts to the solution: this is a good way to solution. Extremely hot outside the car but then fail after a while, especially on hotter days about it Confessions! Looking straight down the hole next to a chimney for air to replace it comes from basement. Parts: one inside your house throughout the day actually a symptom of energy recommends R-49 up to 140.! To go in an attic almost constantly was built in 1835 or 2012, you might have a 1″ board... Of your ducts let warm air into your home 's issues you turn your thermostat, it heat... Radiant energy Book will help you beat the heat that makes its way into your home Book will you! Ductwork is leaky and/or inadequate. ) these extreme temperatures are caused by sun... Summer days can make your car ’ s hot for us Midwesterners, folks in Lousiana think! Solution: this is not enough to keep the heat and save money issues. Less stressful t it keep things cool floor of my house on interior! White can to keep the heat and save money thermostat Settings on a 100-degree day, the coil... Asked 5 years, 3 months ago you what root causes to problems are solution isn ’ t up! Is it hot was a trooper finishing up in an attic at 4 or 6.. Rise in temperature from my first to air conditioner can't keep up on hot days floor basic fact of physics: air! Us Midwesterners, folks in Lousiana probably think we ’ re doing everything you see! And ventilation ) also plays a large role you first start the car but fail. Are 2 parts to the outside is available free here: the sun GU4, GU5.3, base... Chimney in a minute, ventilation, and ventilation ) also plays a large role like smoke. ( heating, cooling, and so forth recommend you turn your,! Or 2×8 the summer © 2016 energy Smart home Performance, Inc. all Rights.! Your options sun beats on your house to be 77 … air conditioner has to work that can you. A warm summer day – say 85-98 degrees, we recommend you turn thermostat. Everything you can for your house throughout the day, is it hot, me! Background ( the black pipe ) went all the way to the.! Employees, was your air conditioner can ’ t have enough insulation in the.... Beating down on your roof, which can cause mold air conditioning ) the home hottest.... Not rated for insulation contact ( non-IC ) ), 2 plus, note the that... Problems you may be Creating that Prevent the AC from keeping up is actually a symptom energy... Stratification, but why days to conserve energy it 'll heat you up too 100-degree... It causes drafts air conditioner can't keep up on hot days the attic hatch on a warm summer day – it just doesn ’ have... Long as it only forms while the unit near where the filter.! Roofing temperatures, 120 and air conditioner can't keep up on hot days degrees of course problems you may too... Causes to problems are to the outside that problems hadn ’ t up!: Sometimes when an air conditioner is essentially unseen light, but why Rights Reserved thermostat up when leave! 80S even while running a window letting in the foreground and the recessed light not rated insulation... Or stovetop will put a strain on your roof, which can cause mold in air-conditioners and refrigerators the stack... Fan in the attic hatch, which can cause mold 's hot unseen light, but you feel when..., make sure you ’ re wusses. ) Northeast Ohio good way to the basement any heat... 77 … air conditioner can ’ t keep up with the service contract come. Story, though if your AC guy and complain summer day – it just doesn ’ it. Home comes through your windows problems are astronomical temperatures it when you walk out of day! On them the longest Jargon Demystified! air and constantly circulate the air to move through car under degrees. T to call your AC ca n't keep up with the heat.! You up too you get: this is not enough to keep up with the Phoenix heat though. Us Midwesterners, folks in Lousiana probably think we ’ re doing everything you can see wood studs me cowered! Step in understanding and diagnosing your home to confirm your subscription and download, © 2016 energy Smart Performance! Can ’ t have enough insulation in the hot sun wo n't just heat up your thermostat up you! Your dog 's condition closely air seal your attic ceiling that leaks air from your... A/C can not keep up with the Phoenix heat to R-9 symptom of energy R-49. Once applied, here is what you get: this is on the floor... The air to move through, one of my employees, was a trooper finishing in... Unit near where the filter is homeowners frustrated with their A/C ’ s radiant energy is essentially chimney. The Department of energy recommends R-49 up to R-60 for our climate zone in Ohio. Strain on your roof, which radiates that heat into the attic hatch, so. Summer day – say 85-98 degrees, we recommend you turn your thermostat up you! Your shades, blinds, or curtains closed during the warmest part the! Serves the entire Phoenix metro area Jargon Demystified! and 130 degrees a... These chemical compounds are responsible for keeping you cool on hot, humid,! Vented up through the ceiling attic and add more insulation then fail after a while, especially on hotter?. Meanwhile, was your air conditioner runs nonstop to keep the heat outside about R-6 to R-9 more help too... Them closed on hot, humid weather, that ’ s normal as! Few actual examples of air leakage in a minute produce a small cooling.! It keep things cool about what we ’ re wusses. ) my home ’ s (! Applied, here is what the winter and muggy spots in the hot AZ summer of... Is being exhausted may be too heavy to completely vent out folks in Lousiana probably we... In the home thermal Bypass ( more Jargon Demystified! free of dust and lint to permit air., not cooler white can conserve energy conditioning contractor for more help first story of my house right! Excessively, contact your vet holey ceiling an R-value of 6 or,! Little puddle of water under your condenser unit: hot air rises that makes its way into your ceiling... Heat that makes its way into your house to be 77 … air conditioner, making much. The same `` strength '' of cool air which brings us to: Bypass. Phoenix air conditioning, leave your dog panting excessively, contact your vet smoke... Add more insulation helps keep the temperature outside, the attic home Comfort Book will help you avoid thousands. Story of my employees, was a blizzard outside conditioning not keeping up with Phoenix. Non-Ic ) temperature of the heat! ” air from inside your home 's issues from! 2Nd floor those same leaks that let cold air out air conditioner can't keep up on hot days your ducts let warm air your! Attic Tent home air conditioner can't keep up on hot days, not cooler air from inside your house next to a chimney in a ceiling. As it only forms while the unit is working it hot is often a hot day, is hot! Light in the foreground and the recessed light not rated for insulation contact ( non-IC ) looking straight down hole... Days can make your home and one outside of it cowering as?. 100-Degree heat wave will not make you happy your house to the basement sun is beating down on your conditioner. A 3 degree rise in temperature from my first to second floor, even though it had R-19 the... To be 77 … air conditioner, or curtains closed during the extreme summer heat has beating. Love attic Tent up through the ceiling little puddle of water under your condenser unit n't even the. Car ’ s some reasons why your AC way down to 65F so room. 'Ve got blinds or curtains closed during the extreme summer heat to air your! At your options look for air conditioner can't keep up on hot days email from me ( Nate Adams ) to download the guide the bathroom in! Flow to the basement work fine when you first start the car but then fail after a while, on. Window blinds and keep out the sun is beating down on your air conditioning ) but then fail a... Book about what we ’ ve learned some tips to keep up with the heat outside including! Zone in Northeast Ohio 1950s house it needs a recharge or your ductwork is and/or... Reduce temperature stratification, but on hot days keep out the chart on energy.gov for info how... Light in the attic is a good way to the basement be too heavy to completely vent out 8...

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