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Light Commercial & Residential HVAC Services You Can Trust.

Proudly Serving Carroll, Frederick, Howard, & Northern Montgomery County, Maryland.

Your Trusted Residential & Commercial HVAC Experts in Carroll, Frederick, Howard & Northern Montgomery Counties

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From heat pumps and warm air furnaces to boilers, we offer superior heating services to repair, maintain, or replace your equipment to make sure it’s functioning properly.
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Our HVAC technicians will make sure your home or business stays cool during the summer with our AC repair, maintenance, and replacement services!
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We offer several tiers of air purification to fit your needs. We also offer HRV, humidifiers, & installation of smart thermostats.

Service Area

We’re Always Right Around The Corner

We stay close to home and proudly service the following counties in Maryland:
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Don’t Take Our Word For It

Frequently Asked Questions

Strange Sounds 

Clinks, pops, squeaks, or grinding. If you are hearing sounds that the unit never made before then it is time to call a professional. Even if the system still provides you with adequate temperature control, the sounds are an indication of am issue that lif left untreated will likely develop into a more expensive repair.

Water or Moisture

Look around the system. Is there lots of condensation or perhaps pools of water? This could be either a problem with the refrigerant which has started to leak or a problem with the drainage system. If you find these issues in your HVAC system, then maintenance or repairs should be the next step.

Odd smells

If you find that there is a pungent odor from your HVAC system, then there are usually two possibilities. 1) there is a problem with the wiring and some of the insulation has burnt away. 2) If the small is musty, then it means that there is pooled water in the system that has become a breeding ground for mold and mildew.

Inaccurate Thermostat

are different rooms different temperatures even though they are controlled by the same thermostat? This could be an issue with the thermostat itself for possibly the duct work.

This is the Seasonal Energy Efficiency Rating. This is associated with the Air conditioning systems performance averaged throughout the entire cooling season.

The frequency of duct cleaning varies depending on the home and the preference of the homeowner. Typically, every 5 years is sufficient. There are a few things to consider when thinking about how often to have your ducts cleaned: 

  • Do you have pets that shed a high amount of hair and dander?
  • Do you have smokers in your household?
  • If anyone in your household has allergies, you may want to have your ducts cleaned more often.
  • If you just moved into a home, it may be a good idea to have the ducts thoroughly cleaned.
  • After a home remodeling, a heavy amount of dust and debris can be generated during a renovation.

A thorough duct cleaning will usually cost between $300 and $500, depending on the size of the home. Beware of companies offering cut-rate duct cleaning services. This is a well-known bait and switch tactic, and you could end up paying much more than you expected, or the company may not perform a proper duct cleaning. The Better Business Bureau has issued a warning about such services.

The size of your system really depends on your home and your needs. To help you make this decision we offer free in-home energy consultations. We will perform load calculations to confirm we are properly sizing your new equipment. Feel free to give us a call to schedule your consultation today!
Here in the Northeast, it is recommended you have your comfort/HVAC system serviced twice per year, preferably in the spring and fall. This will help ensure that your comfort/HVAC system is running as efficiently as possible during the heating and cooling seasons. At EXXEL we offer a Precision Tune Up service which will take care of all of your system’s maintenance needs.

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