How to Look

at a House

A blog with answers
to your questions about

More blog posts about heating and air conditioning:

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

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

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

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

  5. How can checking the fireplace damper reduce energy bills year-round?

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

  7. What is an HVAC system?

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

  9. What does an ultraviolet air treatment system do?

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

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

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

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

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

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

  16. What is a geothermal heat pump?

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

  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 are the minimum requirements for bathroom ventilation?

  23. What is an air conditioning heat recovery system?

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

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

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

  27. How can I find out what SEER my air conditioner is?

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

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

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

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

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

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

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

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

  36. Why is my air conditioner not cooling enough?

  37. What is a return air plenum for a furnace or air conditioning system?

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

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

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

  41. 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.

   Even without any markings on the box, you can identify it as a heat recovery system by observing the extra insulated pipes connected from it to the condenser and water heater. Here’s an example below.

And here’s several examples of the different brands of units, with the last one being of a pair of older units behind their respective condensers, with markings that have been worn off by the weather.

   To learn more about heat recovery systems, we suggest you visit the Q&A page of Trevor-Martin Corporation at; or, for a more detailed explanation of thermal recovery systems, download a technical paper by Ronald Jarnigan, of University of Florida Cooperative Extension Service, by clicking the link below.


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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