Helpful Hints For HVAC Novices And Pros
Your HVAC system is very valuable to your home and family. It keeps the air in your home clean and at a comfortable temperature. If you do not take proper care of it, it will cost your more in energy and repair down the road. Use these helpful tips to take good care of your HVAC system.
If your HVAC system is acting up, take a tour of the house prior to calling a professional. While you are walking through the house, gauge which rooms are the coolest and which are the warmest. This can help the contractor determine the problem areas quickly and fix the problem easily.
In order to avoid having any problems with your air conditioning unit, keep all vegetation at least two feet away from the outdoor unit. The unit should be clear of any vegetation on all sides and above. When you mow the lawn, aim the grass clippings away from the a/c unit. This will prevent grass getting inside the a/c and making it malfunction.
If you want to know more about efficiently heating or cooling your home, go online and download the ENERGY STAR Guide. It provides information for homeowners to learn more about how they can save money while still keeping their home comfortable all year round, so it is a worthy ready.
Do you hear a clicking sound when your fan is turning? This may mean that there is something in the way of the blades of the fan. If it gets so bad that the blade bends, you must replace it, just unbending it will leave the fan unbalanced and can cause further issues.
Consider all of your alternatives before installing a central air conditioner. You can only cool certain rooms, use whole-house fans, or even make use of a geothermal system. The more efficient the system you set up, the less you'll spend on utility bills over time as you use it.
In order to cheaply cool your home, turn the temperature up. If you take a few showers a day or just drink a cold ice water, you'll find that you're saving a lot of money on your utility bills by keeping the thermostat a little higher than usual in your home.
Do not allow your home to reach excessive levels of heat during the summer. Your average AC unit can only reduce the temperature in your home by about 20 degrees in a normal span of time. So, if your home temp reaches 100 here degrees, your air conditioning will only bring that temp down to about 80 degrees. While it depends on the humidity, this is not safe for a human to sleep in to recover from the heat of the summer.
Ask around so you can find a reputable HVAC contractor. People that have had quality work done are usually more than willing to share this information. This is an excellent way to find which companies to stay away from.
If you have a window air conditioner, be sure to check and see if it has an Energy Saver button. If so, use it! This turns off the fan when the unit isn't actually cooling the air, which can save you as much as 30 kwh over the period of a month!
Determining the right HVAC service professional to provide repair or replacement work can be tough when a certain amount of know-how is lacking. To really ensure that the best approach is being taken, some advance research is essential. Hopefully the material presented above has fulfilled readers' needs for useful insights in this realm.
Can the AC filter in your home, office or local mall protect you from Covid-19?
When New York Governor Andrew Cuomo announced last week that malls in New York could not reopen until they installed high-efficiency particulate air filters capable of trapping the virus that causes Covid-19, Harvard environmental health researcher Joseph Gardner Allen was thrilled.
"I've been writing consistently since early February about how healthy buildings should be the first line of defense against the novel coronavirus," said Allen, who directs the Healthy Buildings program at the Harvard T.H. Chan School of Public Health.
"I'm really grateful that we have a leader in the country -- somewhere -- who was finally talking about healthy buildings, ventilation and filtration," Allen said. "That hasn't happened before. It just hasn't happened."
A push to action
Allen was one of 239 scientists who wrote an open letter to the World Health Organization, the US Centers for Disease Control and Prevention and other health agencies, asking for a change in their guidance to the public on how the novel coronavirus, or SARS-CoV-2, can spread.
Current guidance only focuses on "hand washing, maintaining social distancing, and droplet precautions," according to the letter, published Monday in the journal Clinical Infectious Diseases.
The health agencies are ignoring the tiny droplets of virus that sputter and spray from our mouths, become aerosolized and then float away into the air, the scientists said, as a likely means of transmission.
"They don't want to talk about airborne transmission because that is going to make people afraid," co-author Donald Milton, a professor of environmental health at the University of Maryland, told CNN in a prior interview.
"The best vaccine against fear is knowledge and empowering people to take care of themselves," Milton said. "Why wearing a mask is important is because it blocks the aerosols at their source, when it is easy to block them."
MERV ratings
In his edict to New York mall owners, Cuomo was talking about HEPA filters, which have the highest MERV ratings, between 17 and 20.
What's MERV? It stands for "minimum efficiency reporting value," and it's how filters are rated in their ability to trap tiny particles. The MERV ratings go from one to 20: Filters with higher MERV ratings are more effective than filters with lower ratings.
At the highest end, HEPA filters are used by hospitals to create sterile rooms for surgeries and to control infectious diseases, and are able to remove 99.97% of dust, pollen, mold, bacteria and other airborne particles with a size as small as 0.3 microns. For comparison, Covid-19 is thought to be between 0.06 to 1.4 microns.
"Filters are rated at their worst performance, so 99.97% is the worst it will do," Allen said. "And that's rated for a particle size of 0.3 microns, but smaller and larger it actually does better. So the point is that it's capturing nearly all particles."
Unfortunately, most businesses and home owners may find it difficult to retrofit their existing system to accommodate a HEPA filter, or any filter higher than the rating recommended by the system's manufacturer.
Doing so can actually impair the system's performance: Smaller pores in HEPA air filters make it more difficult for it to push air. Using denser filters can affect the efficiency of the unit and strain the fan, while decreasing indoor air quality -- the opposite of what you desire.
"HEPA filtration is not always going to be feasible or practical," Allen said. "But there are other filters that can do the job. What is recommended now by the standard setting body for HVAC is a MERV 13 filter."
High-efficiency filters in the 13-to-16 MERV range are often used in hospitals, nursing homes, research labs and other places where filtration is important.
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