How to Look

at a House

A blog with answers
to your questions about

More blog posts about heating and air conditioning:

  1. How can I find out the size of my air conditioner?

  2. How can I find out the age of my air conditioner or furnace?

  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. Why is my air conditioner running constantly?

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

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

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

  22. My air conditioner outside unit (condenser) won’t start and is making a humming noise. What’s wrong?

  23. What are the minimum requirements for bathroom ventilation?

  24. What is the best air conditioner for a mobile home?

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

  26. When should I switch the thermostat to “EMERGENCY HEAT” for my heat pump air conditioner?

  27. Why does the air conditioner condensate drain line need a trap in it?

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

  29. What is a jump duct?

  30. Is it acceptable for an air conditioning condensate drain line to terminate under the house?

  31. What is the purpose of the vent grille over the bedroom door?

  32. Should I have a return air vent in the master bedroom?

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

  34. How much will I save on my utility bill if I get a new higher SEER air conditioner?

  35. My air conditioner won’t turn on What’s wrong?

  36. Why is there a wall switch next to the furnace or indoor unit of the air conditioner in the garage?

  37. What are the most common problems with wall/window air conditioners?

  38. Which one is better for a home heating system: electric or natural gas?

  39. Why does an air conditioner condenser need to be level?

  40. When does the ban on R-22 air conditioning refrigerant take effect?

  41. Why do the lights dim when the air conditioner turns on?

  42. Why is my air conditioner not cooling enough?

  43. When is an auxiliary drain pan required under an air conditioner indoor unit (air handler)?

  44. Why does it take so long to cool a house when the air conditioner has been off for a while?

  45. What are the right words to use when talking about a heating and air conditioning system?

  46. What is a ductless mini-split air conditioner?

  47. Why is my bathroom vent fan not exhausting enough air?

  48. Why has the thermostat screen gone blank?

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 back-pressure of a closed air vent at the end of a long duct run often forces cold air leakage just behind the air vent during the summer, which causes condensation wetness around the leak in a hot, humid attic. The result is mold growth at and behind the air vent.

    So, closing the vents in unused rooms causes problems that are not offset by the minor cost savings created, and we recommend that you don’t do it.

If you want to reproduce this blog post, please contact us for permission, attribution and link requirements.
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.
©2015 - McGarry and Madsen Inspection.

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