How to Look

at a House


A blog with answers
to your questions about
HOME INSPECTION
and HOME MAINTENANCE

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Welcome to our blog!
We want you to be an informed homebuyer, and each blog post is a question that we have answered for our friends and customers over the years. Hope they help you make a good choice for your next home.

  1. 4)The fan could be too small for the size of the bathroom. The building codes require a minimum 50 cfm rating for switched bathroom exhaust fans, which is also the smallest size available at home improvement stores. It should be adequate for the average 5-foot by 8-foot bathroom, based on the rule of thumb of 1 cfm per square foot of a bathroom with an 8-foot ceiling. But larger bathrooms, and especially the glamour master baths with high ceilings and both a shower and spa tub require much more cfm than the one for one calculation, and often a fan at both ends of the room, to effectively clear the air.

  2. 5)The fan motor is at the end of its lifespan and producing reduced air flow. Vent fans usually start to get noisy when their performance deteriorates and they are about to die, so that would be a clue.

    To learn about bathroom vent fan options, see our blog post “What are the minimum requirements for a bathroom ventilation?”


While we hope you find this series of articles about home inspection helpful, they should not be considered an alternative to an actual home inspection by a local inspector. Also, construction standards vary in different parts of the country and it is possible that important issues related to your area may not be covered here.
© McGarry and Madsen Inspection


More blog posts about heating and air conditioning:

  1. Does a half bathroom (no shower or bathtub) require an exhaust fan?

  2. Is a kitchen required to have a range hood exhaust fan?

  3. The coils on my heat pump are covered with ice on cold mornings. What’s wrong with it?

  4. What is the SEER of my old air conditioner?

  5. What is the difference between the “ON” and “AUTO” settings on my thermostat?

  6. What is a “ton” of air conditioning?

  7. How do I find the right size air conditioner for my house?

  8. What is an HVAC system?

  9. What is the difference between the SEER and EER of an air conditioner?

  10. What does an ultraviolet air treatment system do?

  11. The coolant line to the outside unit of my air conditioner is frozen. What's wrong?

  12. What size air conditioner is right for my mobile home?

  13. What is the minimum SEER rating for a new air conditioner?

  14. What does the “AFUE” rating of a furnace mean?

  15. How much life is left in that air conditioner?

  16. Why is there mold around the air conditioning ducts?

  17. What is a geothermal heat pump?

  18. What is the difference between a heat pump and a cooling air conditioner?

  19. Is it alright to close the air conditioning vents in unused rooms?

  20. What is the right MERV number for my air conditioning filter?

  21. Should I move my air conditioner into the attic?

  22. What is an air conditioning heat recovery system?

  23. What is the average lifespan of an air conditioner?

  24. Should I remove an old whole house fan or keep it?

  25. Will closing doors reduce my heating and cooling costs?

  26. Why has the thermostat screen gone blank?