HVAC FAQs

Over the years, our HVAC technicians have been asked a lot of questions, from “How often should I change my air filters?” to “How long should an AC unit last?” We’ve heard it all, so to better educate the customers we serve, our technicians sat down and compiled this comprehensive list of some of the most frequently asked heating and cooling questions.

Popular Questions

1What Size AC Unit Do I Need for my Home?
Many customers automatically buy a larger air conditioner than they actually need because they believe it will keep their home more comfortable. This is not a good way to select a product however, and can end up costing the homeowner more in energy bills. To accurately determine the size of the AC unit required, the homeowner needs to determine the square footage of the area to be cooled. For square and rectangle rooms, multiply the length of the room by the width. For a triangular room, multiply the area of the room by the width and divide by two.

An area that is 250 to 300 square feet needs an AC unit that is 7,000 BTUs an hour. Add 1,000 BTUs per 50 additional square feet. A contractor can help a homeowner determine the exact capacity needed.
Source: http://www.energystar.gov/?c=roomac.pr_properly_sized
2What is a Heat Pump?
Simply put, a heat pump is a device which moves heated air from one place to another. Many household appliances, including HVAC equipment and refrigerators use these. Heat pumps function by absorbing heat in a cold space and transferring it to a warmer place. This is how your refrigerator works. HVAC heat pumps are a little different. Reversible heat pumps have the ability to transfer heat in either direction. So, if your home has a heat pump it may move hot air from your home to the outdoors in the summer, and absorb warm air from outside to send it inside during the winter. Heat pumps are usually used in conjunction with an air conditioning or heating system to provide more efficient comfort.
3What Is The Best Thermostat To Use for My Cooling System?
There are several thermostats that will work will with a cooling system. The final decision will largely depend on the equipment the homeowner has and the options they are looking for. iComfort Wi-Fi This option is extremely user friendly and programmable. It has excellent energy efficiency and overall performance. Lennox ComfortSense® 7000 Series thermostat This can be used with a duel fuel system and has a touchscreen. It works to promote efficiency and performance of the entire heating and cooling system. ComfortSense® 5000 Series touchscreen thermostat This is also programmable and is compatible with nearly any heating system. It can be mounted directly to a wall or removed for remote programming. ComfortSense® 3000 Series thermostat This is best for basic operations with a value price and the ability to customize different temperature settings.
4Why Is My Air Conditioning System Freezing Up?
Some people are surprised to see their air conditioner frozen on a hot day. There are two main reasons why an air conditioning system might freeze up. 1. Not enough airflow This can occur if the ducts are extremely dirty or clogged preventing air from moving through the system. 2. Refrigerant leaking If refrigerant is leaking it can also cause the system to freeze up. If this is the case, not only will the refrigerant have to be cleaned up, but the cause of the leak should be determined. Whenever a person sees frost or ice on an air conditioning machine it is best to address the problem right away to avoid damage to the machine. Regular maintenance can help prevent these types of problems.
5How Often Should I Change My AC Filters?
Although this question depends largely on your use of your unit, the answer is simple: clean or replace your AC filters when they are dirty. Air filters keep debris and allergens from coming into the home. If the filters are dirty your indoor air quality goes down. Some filters may be washed, dried and reused. Others must be replaced. In either case, take the time once a month to check the filters. If they are dirty and clogged with debris, clean or replace them. Changing your air filters regularly improves the output of your A/C unit, reducing the work your machine has to do to keep you cool and comfortable.
6What is Cystic Fibrosis?
Cystic Fibrosis transmembrane conductance regulator (ATP-binding cassette sub-family C, member 7). The CFTR protein on human chromosome 7 contains a broken protein, which hinders the ion chloride channel, causing thick and abnormal mucus in organs, most notably the lungs. The most common mutation is ΔF508, which contains a protein that does not fold properly and quickly degrades. More than 1800 mutations have been identified thanks to advances in technology.