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Bathroom Exhaust Fan Services Maryland

Bathroom ventilation fans Maryland

Do exhaust fans in bathrooms really need love?

Exhaust fans are in most household bathrooms.  

Yet, as familiar as they are to Maryland homeowners, there are several important factors that are getting overlooked.  

Five Important Bath Fan Things

  1. Most exhaust fans installed in Maryland homes vent moisture directly into the attic.
           --This causes mold
           --This accelerates the age of the roof
           --This degrades existing insulation
  2. Bathroom exhaust fan ducts running through an attic can "sweat" during a Maryland winter if not insulated properly.
  3. Different fan models exhaust different amounts of air per minute.
  4. If an exhaust fan is making noise, that does not mean it is working properly.
  5. Incorrectly installed fans can act as gateways to the attic increasing BGE and Pepco energy bills.

A bathroom exhaust fan is important for good overall household indoor air quality and should be installed correctly!
Answer - YES!

Bathroom fan replacement Maryland

5 things correctly installed bathroom fans do have:

  • The exhaust fan damper is vented through the roof or side wall.
  • A bath fan should be measured for how much air it is exhausting after installation.
  • A bathroom fan duct should be insulated to R-8 in Maryland's climate
  • A tightly pulled or rigid duct is preferred with a maximum run of 25'
  • The fan housing should be air sealed  after installation to prevent air leakage
Let the Experts do It! 

Bathroom Fan Package
We do it all!

All Inclusive & Exclusive
New Install or Replacement in Maryland

Current Fan Evaluation
 We measure your current bath fan exhaust speed
 We inspect the current exhaust fan termination point
 We look for signs of duct "sweating" or roof mold in the attic

Bathroom Exhaust Fan Replacement Includes
 A high performance fan with low noise
 Fan is set to the right speed for the size of the bathroom
 Air seal the new fan installation to stop air leakage
 Properly seal and insulate the bath fan exhaust duct
 Properly terminate the exhaust fan duct to the "outdoors"**
 Add a delay timer for automatic service
 Check the fan speed upon completion
 Check the fan speed in one month after completion

**The price is standard and includes up to 5' of exhaust ducting


Venting exhaust to the "outdoors" should be a high priority.

Bathroom exhaust fan installation

This is a classic example of years of moisture exhausting directly into the roof sheathing causing black mold and shortening the roof system's life.

Proper bathroom ventilation in Maryland

Bathroom ventilation fans draw out moisture and odor.  Did you know these devices can also be used to improve indoor air quality?  With specialty switches and timers, properly installed exhaust fans not only make for a more healthy bathroom, but bath fans can also improve a Maryland home's overall indoor air quality!

Building Analyst exhaust installation

We follow building science principles to guide our installation practices.
Services provided in Maryland

Exhaust fans that are properly vented through the roof. Does your roof have any of these?

Contact for Price 
We have standard pricing that we will gladly share, however no two projects are exactly alike so we need to hear from you.
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    Specialized Maryland Contractor


    • MHIC Licensed
    • Building Analyst Certified
    • Envelope Professional Certification
    • EPA Lead Renovator Certified
    • YouTube Learning Channel


    Our mission is to help Maryland homeowners create a more comfortable home and save energy. We achieve this by applying building science principles and modern air sealing and insulating techniques.

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    Services & Service Areas

    Anne Arundel County, Baltimore County, Baltimore City, Carroll County, Charles County, Harford County, Howard County, Montgomery County, Prince George's County



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    MHIC 158968
    8345 Sperry Court
    Laurel, MD 20723


    Hometrust Remodeling

    Proudly working in BGE & Pepco's Home Performance w/ ENERGY STAR program in Maryland to deliver whole-house energy savings to improve comfort & help protect the environment.
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    An Energy Auditor's Purpose 
    "Energy auditors visit residential buildings and talk to owners and residents.  They inspect, test, and measure to decide what energy-efficient retrofits are practical and cost-effective." Residential Energy