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