What Is the Best Brand of Air Pump for Aquariums and How Do You Determine What Size to Get?

What is the best brand of air pump for aquariums and how do you determine what size to get?

What Is the Best Brand of Air Pump for Aquariums and How Do You Determine What Size to Get? 1

you can buy a small or medium one very cheap at anl large outlet store that sells pets or fish supplies you will want a valve of some sorts to help regulate air flow

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Air Flow, Air Systems, Pressure, and Fan Performance

For kitchen ventilation applications an air system consists of hood(s), duct work, and fan(s). The relationship between the air flow rate (CFM) and the pressure of an air system is expressed as an increasing exponential function. The graph below shows an example of a system curve. This curve shows the relationship between the air flow rate and the pressure of an air system.

What Is the Best Brand of Air Pump for Aquariums and How Do You Determine What Size to Get? 2

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What type of windows provide the best air flow?

I would think that any window which opened completely would be the ones of choice not ones which only opened half way, the screen would be on the inside not out so no problem with bugs or anything else

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Opinion On This Gaming Pc? Specs Below?

hi Lewis, I do not think too highly of it and if I were you I would not be caught bringing this pack of trouble in your home and that's a fact. like I said before stay away from Pentium parts and the next question you ask is asking about a video card that is a Pentium part the Nvidia GeForce gtx 650 so if you buy this computer welcome to crash and burn hotel. this is not a place you want to be so I will not go into more detail except mid sized computers has very little air flow so just try something for yourself to fully get the real impact go to newegg, amazon or tigerdirect and read what it saids about thermaltake arrow cases or cooler haf and you will see what they say about air flow then read what it saids about mid sized cases and you will see why I recommended the computer repairman building you a computer. prefab computers are the pits. good luck I hope I was helpful to you.

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What is the difference between the air pre-heater & air blower?

AIR PRE HEATER. - An air preheater (APH) is any device designed to heat air before another process with the primary objective of increasing the thermal efficiency of the process. . they may be used alone or to replace a recuperative heat system or replace Steam coil. AIR BLOWER ------ This device makes use of the rotating impellers to increase the speed of the air gushing out of the drive out shaft. An air blower accelerate air flow radially .while changing the directions by 90 degree. these Power Tools mostly used in heating, ventilation and air conditioner (HA AC) industries

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Can I treat cat dandruff at home?

Adding or increasing the amount of fish oil in their diet can be extremely helpful. Brushing is also important to make sure that there is not a lot of loose hair that is reducing air flow next to the skin. You can use a humidifier or even just let water steam on the stove to help increase the humidity in the room. Instead of attempting a bath just use a wet cloth to wipe them down. they may even enjoy that a bit

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What's the easiest way to add hp to the stock motor?

#1 Better air cleaner.#2 Better spark plugs#3 Better exhaust pipe, muffler.#4 Better coil, distributor, ICM.#5 Better carb or injectors.#6 Better Exhaust manifolds or headers.Think of the engine as an air pump. Anything you can do to improve air flow in, cumbustion and air flow out will help. The order of this list will change depending on cost of parts.

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What direction is the air flow on my home heater?

usually the air is being pulled past the filter not pushed into it

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Do High-MERV Filters Always Reduce Air Flow?

Over the past few months, I've taken a look at some critical issues for indoor air quality. Starting with the issue of how much time we spend indoors, I then wrote about kitchen ventilation, the panoply of indoor air pollutants, problems with filters in general and with high-MERV filters. Now let's take the next step: a look at what research has been done on high-MERV filters and what can be done to overcome those unintended consequences I wrote about. In this article, John Proctor summarized some of the results he and his colleagues have found from studying California homes. One of the concerns in their research for the California Energy Commission was homeowners changing out 1″ thick standard fiberglass filters with 1″ thick pleated filters. The Air Conditioning Contractors of America (ACCA) protocols for HVAC design assume a pressure drop of 0.10 inches of water column (i.w.c.) across the filter. (Keep that number, 0.1 i.w.c., in mind as a reference point. I will be coming back to it.) If a system is designed with a standard filter for that pressure drop, the pressure drop with a pleated filter of the same size will most likely be higher. In addition, poorly designed and installed duct systems already have external static pressures that are too high. The typical furnace or air handler is rated for 0.5 i.w.c. but many run much higher pressure. David Richardson of the National Comfort Institute says that in the testing they've done, the average system is running at about 0.82 i.w.c. Result: In the California study, Proctor et al. found that the pressure drop across the filter in 34 HVAC systems was 0.28 i.w.c. That's nearly three times what ACCA protocols assume. It's also more than half of the rated external static pressure for the whole system. Article: Is There a Downside to High-MERV Filters? by David Springer, Home Energy Magazine, 2 November 2009 David Springer of the Davis Energy Group published this great article with a lot of detail about what they did and what they found, including blower energy use, compressor energy use, and the specific filters they tested. I will let you go there for the details because here I am mainly going to focus on the issue of pressure drop across the filter and the resulting effect on air flow. And speaking of filter pressure drop, here's their chart for filters with MERV ratings from 2 to 13. They tested all the filters at the same width and height (16″ x 25″) but the depth varied from 1″ to 4″. They used 492 feet per minute (fpm) as the face velocity because that's what the ASHRAE filter standard (52.2) calls for. With that face velocity and those dimensions, the air flow rate is 1,367 cubic feet per minute (cfm). (Flow rate equals area times velocity; see my article on the continuity equation for more on this.) Results: As you can see, there's not a steady increase in pressure drop as the MERV rating increases. What does happen, though, is that the pressure drop jumps up significantly as soon as you change from the standard 1″ fiberglass filter (MERV-2) to the next level at MERV-6. They also found "a definite trend toward lower air flow with higher-MERV filters for systems using PSC motors." (PSC stands for "permanent split capacitor." A PSC motor is the one powering most HVAC blowers. Variable speed blowers have electronically commutated motors, ECMs.) The final result I will mention here is that they did not see as much difference as they expected for filters of different depths. For example, "the 4-inch Filtrete 1550 (MERV 12) was only marginally better than the 1-inch Filtrete 1700 (also MERV 12) and the two other [1-inch] MERV 11 filters of the same brand (1000 and 1085)." Article: The Effects of Filtration on Pressure Drop and Energy Consumption in Residential HVAC Systems (pdf) by Brent Stephens, Atila Novoselac, PhD, and Jeffrey A. Siegel, PhD, HVAC&R Research, Vol. 16, #3, May 2010 This one is an academic paper so if you want all the details, equations, and references to other works, click the link above and download the paper. (Brent was a student at the time he wrote this paper and has a page on his filter research on his website at the Illinois Institute of Technology, if you want to dive even deeper.) They looked at filter pressure drop and energy consumption, both theoretically and using four months of data from two air conditioning systems in a test house in Austin, Texas. Results: What they found is what you would expect, and in their limited range of MERV ratings tested, they did see an increase with each step up the MERV scale. Here are their results for filter pressure drop: So the low-MERV filter is hitting the ACCA design pressure drop. The mid-MERV is twice as much and the high-MERV is three times as much. They also found that air flow in the high-MERV filters dropped by 7% and 11% in the two HVAC systems compared to the low-MERV filters. Likewise, the mid-MERV filters also showed decreased air flow relative to the low-MERV fitlers, this time 3% and 8% lower in the two systems. As you can see above, the research shows that in general, HVAC systems with high-MERV filters* have a higher pressure drop across the filter. This part is common to all three studies above. What happens with the air flow depends on what kind of blower the HVAC system uses. In a system with a PSC blower, the air flow drops and energy use does not change much. The Stephens paper cites a 2002 study showing that 90% of all residential HVAC systems had PSC blowers. Certainly that number has fallen in the past 16 years, as high-performance homes and high-performance HVAC systems have become more popular. But I am sure the great majority of homes still have PSC motors running the blower. For those with the other type, the electronically commutated motor (ECM), the controls on those motors typically ramp up the motor speed as the pressure increases so relatively constant air flow is maintained. But there's a penalty. Blowers with ECMs can be more efficient than those with PSC motors when they are operating against the pressure they are designed for. But when the pressure is higher, they can end up using more energy than the PSC blower. So what can you do to be able to use a high-MERV filter* and not suffer a high pressure drop across the filter and the resulting loss of air flow (PSC blower) or increased energy use (ECM blower)? It's actually pretty simple. You just have to make the filter large enough to have a low face velocity. And that's where I am going next with this series. You can get a head start by reviewing the other articles I've written on this topic in the past few months, especially the one on the continuity equation. The Path to Low Pressure Drop Across a High-MERV Filter What Percent of Time Do You Spend Indoors? * These are affiliate links for Amazon and TruTech Tools. You pay the same price you would pay normally, but Energy Vanguard makes a small commission if you buy after using the link.

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