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  1. Excessive Mildew Exterior of Plenum - 6 Year Old House
  2. 101 outside ambient
  3. Condensation on duct in crawlspace
  4. Poisiones gas escaping
  5. First time I've seen this...
  6. Intake air to furnace
  7. short of combustion air?
  8. Pellet burner as main heat source?
  9. What to do What to do
  10. Advanced HVAC video training for home inspctors on USB drive.
  11. Flex furnace vent connector
  12. Tuesdays brain twister
  13. Freshair supply for electric furnace
  14. Duct Connected to Chimney
  15. Thoughts
  16. bypassing a thermo stat
  17. Another use for secondary drain
  18. Propane tank clearance from overhead heating vent
  19. Hearth requirement pellet stove?
  20. Charley B or David A
  21. Old oil burner furnace abandoned in crawlspace
  22. Power vent + direct vent?
  23. Age of Fedders unit.
  24. Vent for floor heater
  25. Air Handler rating
  26. Gas Firplace fog
  27. Fujitsu Mini Split
  28. HVAC Question
  29. Carrier Size
  30. Gibson/Nordyne ?
  31. Haier Condenser Manufacture Date
  32. Plastic Gas pipe in furnace room
  33. Flue exhaust in chimney for furnace
  34. Is this right?
  35. Dating a Goodman
  36. furnace date for Air ease?
  37. Is a drip leg required on a gas line to the furnace or the water heater in Calif?
  38. Appliance Date
  39. Never had this...
  40. Exhaust/intake vent under a deck
  41. Did I break it? ...Heat pump
  42. Heat pump
  43. Thermostats that make a clicking noise
  44. Green Ductwork
  45. Condensate drain
  46. Blower assembly at termination of dryer duct...
  47. Dornback Furnace
  48. Sweating
  49. Which outside ac unit went where?
  50. Ac Date?
  51. Poor cooling, not very old outside unit evidently performed well
  52. Dampers in Heat Ducts
  53. Unusual Venting
  54. Malibu Slant/Fin Boiler Age?
  55. How old am I?
  56. HVAC unit - air blowing out of cabinet
  57. electric baseboard heater
  58. Furnace room door opens in
  59. Clare furnace age
  60. Trane System Blower Motor
  61. Unreadable Data Plates
  62. PVC Dryer Vent
  63. Electric Water Heater
  64. Electric Water Heater
  65. Need help dating Water Furnace Geothermal
  66. Florida Heat Pump Question
  67. 1967 Electrical furnace
  68. Temperature differential
  69. Why Would There Be A Hot Spot On This Furnace?
  70. What are these parts on a boiler?
  71. Screw in the cooper pipe of the boiler???
  72. Service switch
  73. Furnace burn
  74. Not for Larson's eyes
  75. GE HVAC Date Code - age needed?
  76. Soot-like ceiling marks
  77. Through wall mold ac
  78. Water Heater Flue set up
  79. HVAC with plastic exhaust vent pipe ... need advice, Pics incuded
  80. Oversized
  81. Painted furnace flue?
  82. Suspected asbestos
  83. Red flags for central split systems
  84. Need Some Help With The Age Of An American Standard Boiler Please
  85. Intake
  86. Singer a.c.
  87. High rise condo HVAC question
  88. Corrugated plastic water heater flue? Lochinvar DVN040-1 unit
  89. Plastic for furnace....vent ducting
  90. AHIT Opinion On Inspecting Air Cooled AC's
  91. Scorch marks
  92. humming sound
  93. Lennox pulse
  94. Drywall separating the enclosure from the Attic
  95. Special Thanks from the Building Intelligence Center
  96. And the winner is....
  97. Burnt my arm
  98. Btu output
  99. Age of Day and night furnace
  100. Heat pump AHU
  101. Message Board responses
  102. Shared venting
  103. Gas Fireplace using Class A vent
  104. Amana Heat pump age...9601275433
  105. Age for Florida Heat Pump (FHP)
  106. mor-flo air heater age
  107. Tell me what you see or would tell your client
  108. Boiler Question
  109. New, free, downloadable HVAC Inspector logo.
  110. I'm no HVAC tech...
  111. Boiler
  112. Floridians learning about boilers?
  113. Interesting statistic about CO deaths
  114. Crystals in vent.
  115. Water Heater Tied into Boiler
  116. Small vent
  117. Type B vent termination question
  118. What is this for? Fresh air intake or exhaust?
  119. Age of GWA boiler
  120. Spray Foam and Fiberglass Insulation
  121. Patio Enclosure distribution
  122. Odd stack of appliances
  123. Crane Air Handler Age
  124. Inline Duct Fans
  125. Sidewall venting height requirements
  126. Bosch FHP Age
  127. Humidifier ?
  128. High Efficiency Gas furnace Vent
  129. Heat pump
  130. What do you say about this??
  131. Anybody help with the filter on this HVAC system?
  132. Need to identify age of an Amana A/C Condenser
  133. Air handler drip pan
  134. Air handler support
  135. York condenser age? Old for house....
  136. Call it out or not?
  137. Refrigerant line coil
  138. Gas Furnace/Water Heater Vent Issue?
  139. Heat pump
  140. How Do You Determine if Radiant Heat is Working
  141. Hydrotherm boiler age?
  142. See anything?
  143. Need help identifying age and size of Weather King Air Handler
  144. Rheem furnaces
  145. Furnace performing as intended
  146. Water Furnace age and TPR question
  147. Compressor covers
  148. Help needed with oil burner vent
  149. 4 appliances into 1 vent
  150. Open Vent?
  151. Question about gas furnace I inspected yesterday
  152. Ice on B-vent
  153. Just put the flue.....right there
  154. Furnace Date Help
  155. hydronic forced air furnace?
  156. Laars boiler in crawlspace
  157. Total Cluster ???????
  158. New InterNACHI article: Homeowner Maintenance: Changing the HVAC Filter.
  159. U.S. drops rule requiring more efficient furnaces
  160. No inspection today?
  161. Chaaaarleeeey
  162. An Apparent Short?
  163. Amp draw
  164. HE and WH power vent <18" from electric meter
  165. Furnace chimney?
  166. High eff furnace flue
  167. Ghosts?
  168. Lennox Furnace
  169. Unitary AC
  170. Second furnace in garage with register?
  171. What are these?
  172. Inspecting air flow balance
  173. Updated InterNACHI Gallery graphic of the expansion tanks for the boiler system
  174. Lennox Equipment Nomenclature
  175. Have you seen this heater attachment?
  176. Flue Venting Gone Wild
  177. Make up on externally vented furnace?
  178. Miller Air Handler age?
  179. Heat Exchanger
  180. Exterior of HVAC - Attic ducting...coming apart...Need advice
  181. Fireplace
  182. Watched exchanger being inspected
  183. Insulated ducting
  184. Age for Dayton furnace needed.
  185. Help with furnace age
  186. Age of "Water Furnace" Geo-Thermal Heat-Pumps
  187. Signature Manufactured for Montgomery Ward
  188. Heat pump flow
  189. HVAC
  190. heat pump cycling before reaching set point
  191. Temp-O-Matic Furnace Age
  192. baseboard heaters
  193. Single Wall vent pipe question
  194. condenser platform
  195. Heat Pump moisture
  196. Heat pump or not!!
  197. High efficiency furnace vent
  198. Need Armstrong furnace age
  199. Wards Heater age
  200. Furnace flue wind cap ?
  201. Heat pumps what is wrong with this pic
  202. York Help
  203. Un-capped vent...does it need a cap ?
  204. What age is this
  205. Venting
  206. turning on gas
  207. Homemade AC System
  208. Would you write this up
  209. Does anyone know what this is?
  210. CO Gas Detectors and Analyzers for home inspections
  211. HRV trumps "fan only" mode?
  212. American Standard/Trane Furnace age please?
  213. Trane Aux. Heat ran for 2 hrs.
  214. York age please
  215. Drops per run of supply air duct
  216. Defective chimney
  217. 2 AC units and 1 air handler
  218. Duct from supply to return
  219. Underground oil storage tank
  220. Anybody offer acid tests to refrigerant systems?
  221. Furnace adequecy
  222. Heating System Shut Off Switch Location
  223. Furnace backdrafting into home.
  224. Duomatic Olsen furnace age??
  225. Valve in condensate line.
  226. Vacations
  227. Need some advice
  228. Mismatched System
  229. under pressure.
  230. Soffit venting for bath fan OK?
  231. Ancient Space Heater
  232. PVC 40 fittings used for HE furnace vent
  233. AC older than House?
  234. NACHI.TV releases free online training video "Find the Crack in the Heat Exchanger"
  235. how old is this furnace?
  236. LP Gas Tank at Window
  237. AC reset question
  238. Heat exchanger inspections
  239. Air Return question
  240. positive pressure
  241. ABS acceptable for combustion vent
  242. Heil Air Handler Size Help
  243. Heat Exchanger?
  244. geothermal heat/cool
  245. Mercury Thermostat
  246. Secondary condensation Cap question
  247. Defective Installation HVAC
  248. How many tons are needed?
  249. Help Identify
  250. Dryer Vent Pipe