December is Winter. The actual season doesn’t officially start until the solstice on 20–21, but winter weather doesn’t run on a strict calendar anyway.
However, just because December has arrived doesn’t mean you missed the window to schedule annual maintenance for your heating system. Your furnace, boiler, or other heater hasn’t put in the main portion of its job yet, and it needs to have a full inspection and tune-up from professionals before then. Although it’s simpler to have the job done in early fall, it’s much better to have it done a bit later than to skip it altogether.
You’re concerned about the indoor air quality in your house, and that’s a good place to start. IAQ in homes is often remarkably poor, four or five times worse than that outdoors. But if you have air filters to improve the air quality, why aren’t you noticing any positive results? If you’re still experiencing the same dusty air, the same number of allergens, the same coughing fits, etc., then something must be wrong—but what?
As we prepare our homes for winter, it’s important to assess our heating systems. The best way to do this is to schedule routine maintenance 
The weather is cooling down at the end of October—we’re finally in the full fall weather. That means furnaces are going to start coming on for the first time since early spring.
October is the first full month of fall and the point when we start to experience cooler weather as a prelude to the winter. It’s also the time when we recommend our 
When it comes to providing heating and air conditioning to commercial spaces, the most popular option is the packaged rooftop unit. You’re familiar with these—you see them on top of most commercial buildings, and they’re popular locations for chases and shootouts in movies. But rooftop units are common for a reason, and it’s not just to give movie heroes a place to run for cover during an action scene. 
Buying used, or “previously owned,” makes sense in many avenues of daily life. For example, purchasing used books is a great investment. Used furniture is often a terrific bargain, and a smartly bought used car bought can provide many years of service.
Of the different ways a central AC system might malfunction, nothing is more terrifying than news of a dead compressor. It’s like being told the engine of a car is shot. But while someone who has a classic car may feel it’s worth it to put in a new engine, there’s no such thing as a “classic” air conditioning system! Nobody collects them, nobody holds vintage air conditioning shows. When the compressor dies, an owner must face the question whether it’s more cost-effective to replace the whole AC than just replacing the compressor.
A common problem we recommend our customers look for with their central 
If you’re asking this question, you already know that your central air conditioning system has an air filter. We hope you also know that this filter must be changed routinely so it won’t become excessively clogged. We recommend changing the filter for a clean one every one to three months to prevent the blower in the HVAC system from straining too hard and wasting energy.