How often should I change my air filters?

The simple answer is when they are dirty, but there are some factors we can take a look at like your general air quality, do you have pets? Smoker? Etc. Most air filters are recommended changing every 30-60 days depending on those factors. If it’s a vacation home or if you have no pets and keep a clean house than you could get by with anywhere from 6-12 months. We recommend just taking a look at your filter regularly or sign up with a regular filter change with Max Mechanical and forget about it!

How do I know what direction to put my filter in?

The arrow indicates air flow direction; the arrow should always be pointed toward the furnace.

When should I change my batteries in my thermostat?

We recommend you replace your batteries with new ones every 6 months in your thermostat, if they are needed.

What are some of the differences in types of thermostats?

Number of Stages
The number of stages refers to the number of heating or cooling sources that may be controlled by a single thermostat.

Programmability refers to the level of control a user can have over the system. Programmable thermostats allow you to set the heating or cooling system to turn on or off at certain times of the day or on certain days of the week at different temperatures.

Thermostats vary by the different types of heating and/or cooling applications they control. Because there are many different heating and cooling sources it is important to make sure the thermostat you purchase can operate the type of heat or cool source you will be using. For example, some thermostats can handle a heat pump system while others cannot.

User Interface
User interface refers to the method or way in which a person interacts with their thermostat. Thermostats may be mechanical with a simple dial, digital with buttons to move the temperature up or down, or feature a touch screen. As thermostats move from mechanical to touch screen, they tend to get more complicated in terms of functionality and operation.

Some thermostats offer features that are specific to that thermostat. These features may include sensors (indoor, outdoor, remote…), humidification control, color and even user defined backgrounds, internet connectivity, and password protection.

Changeover Type
Thermostats may feature automatic changeover or manual changeover. Changeover refers to the thermostat being switched from heat to cool as the air crosses a certain temperature. Auto changeover thermostats switch from heat to cool automatically while manual changeover thermostats must be changed by hand.

What causes ice to form on my outside unit or pipes?

There are several possible causes for this including: dirty filters, dirty evaporator coil, indoor blower not working, not enough refrigerant, perfect or fine leaks, outdoor temperature is too low, malfunction expansion valve, low pressure switch fail, and lastly…restriction within the copper pipe .

Do I have to register my new air conditioner with the manufacturer

Yes!  Lennox is the only manufacturer that offers a full warranty without needing to register with them. Almost all other brands will only offer a full warranty if you register with them online.

What does “SEER Rating” mean?

The Seasonal Energy Efficiency Ratio (SEER) is a measure of the cooling efficiency of your air conditioner or heat pump.  The higher the SEER number, the more efficient the system is at converting electricity into cooling power.  The SEER for your new system should be at least 13 or higher.

What does “MERV” stand for?

The Minimum Efficiency Reporting Value, also known as MERV, measures the performance of air purifiers, specifically large purifiers intended to clean an entire house or building.

Whole house and building air purifiers usually receive MERV ratings of between 1 and 16, though the upper limit is sometimes extended to 20. Common residential air purification systems tend to fall within a narrower range. Higher numbers translate to more effective air filtration

FAQs: Some Common HVAC Terms Explained:

Welcome to our FAQs section, where we will define some of the most commonly asked-about HVAC terms. Don’t see a term on the list that you need a definition for? Contact us!

Air Handler: An air moving and/or mixing unit. Residential air handlers include a blower, a coil, an expansion device, a heater rack and a filter. Heaters for air handlers are sold as accessories. In some models, heaters are factory installed.

Capacitor: simple devices used in most HVAC equipment to assist compressors and motors with starting and running effectively. During the hot summer months, many capacitors in outdoor units fail at a high-frequency rate.

Compressor: This is the heart of an air conditioning or heat pump system. It is part of the outdoor unit and pumps refrigerant to meet the cooling requirements of the system.

Condenser coil (or outdoor coil): In an air conditioner, the coil dissipates heat from the refrigerant, changing the refrigerant from vapor to liquid. In a heat pump system, the coil absorbs heat from the outdoors.

Condenser Fan: The fan that circulates air over the air-cooled condenser.

Drain Pan: Also referred to as a condensate pan. This is a pan used to catch and collect condensate (in residential systems vapor is liquefied on the indoor coil, collected in the drain pan and removed through a drain line).

Expansion valve: Regulates refrigerant flow into the evaporator.

Freon: Freon is the cooling agent used in most air conditioning systems’ evaporator coil. Every air conditioning system needs a refrigerant (also called a coolant) that actually creates the cool air — that’s the role of Freon. Currently, most new units use R-410A instead of the older R22, which has doubled in price in early 2012.

Package units: These units are all installed outside.

Split system: The condenser and compressor units are outdoors, the rest is inside


Contact Info

Max Mechanical Air Conditioning & Heating Licenses: #TACLB14517E & #TACLA14517R
2313 Michigan Ct. Arlington, TX 76016
Phone: (817) 518-9171 Fax: (817) 459-4113

Business Hours: Monday – Friday 8:00 am – 5:00 pm On call during weekend

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