Secrets The HVAC Experts Don't Want You To Know
When HVAC is something you want to learn about, you're going to need some solid advice on the subject. It's not hard to learn about if you're able to get the right kind of information. That's what this article will provide you with, so when you're ready you should read along.
Ask for referrals when hiring someone to install your HVAC system. Someone may seem like they know what they are doing, but you cannot simply take their word for it. You should be able to call past customers to get an idea of what to expect from this particular installer.
If you need to decide the best place to put your outdoor compressor unit, consider putting it in a location that is in the shade. If it sucks in cool air, it will need to work less to coll the air inside, which can make it last longer.
Prior to choosing an HVAC customer, try to have an idea of what you want done. It is going to be hard to get a price estimate on the phone if the current system isn't something they've seen. In addition, you need to be able to tell the contractor what you have already tried. Understand this information beforehand.
If you do have a good experience with a HVAC product or contractor, let others know. Go online and post a review so that people can easily find out who and what brands to trust. At the same time, you can check reviews online to learn more yourself get more info about what's available.
When the spring comes and the days begin to warm up, call in a pro to give your HVAC a once over. This will ensure that your air conditioner works as expected all summer long, stopping you from sweating it out when you least expect the system to fail.
If you are uncertain about which HVAC contractor to call when you experience an equipment failure, take the time to ask friends and family for personal recommendations. By doing this, you will be able to feel more confident about the choice you make, because you will have gotten the opinions of people you already know to be trustworthy.
Before having someone install a new HVAC system or maintain or repair yours, make sure they are insured. Having someone who is insured work on your system will assure that if anything happens while they are working at your home, they are financially covered and you will not be responsible.
If you are uncertain about which HVAC contractor to call when you experience an equipment failure, take the time to ask friends and family for personal recommendations. By doing this, you will be able to feel more confident about the choice you make, because you will have gotten the opinions of people you already know to be trustworthy.
If you currently have a manual thermostat, consider installing a programmable one. You can set your system for different temperatures depending on time of day and if anyone is home. Also, you can set upper and lower temperature settings to allow for a comfortable range of temperatures so that heating and cooling don't kick in when not needed.
Keeping your HVAC system in good working order is very important to your home's environment. When it goes bad, it can make living at your house a nightmare. Thanfully, the tips from above provided you with excellent tips to keep your HVAC system lasting a very long time. Refer back to them from time to time to ensure that it does not go bad on you.
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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