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  1. HVAC return air and condensate line questions
  2. Cold air return
  3. What is it and what does it do???
  4. Wording for not testing AC in cold temperatures
  5. Heat Pump not performing like it should
  6. AC, onsite disconnect question
  7. Is this rust?
  8. Heater duct insulation ...question
  9. The Problem With Flexible B-Vents
  10. Condensate drain line
  11. Furnace Date Codes
  12. Heat Pump System Air Filter Returns
  13. Brine Stains on th
  14. AC condenser fan ran when thermostat was in heat mode on "fan" setting
  15. Armstrong Furnace Age?
  16. Appliance Connector Label Photo?
  17. Boiler explosion in Mass.
  18. Water Heater Vent Pipe Splice...
  19. CO testing
  20. No suction at return air vent
  21. Need some help on furnace age. Metzger / Milwaukee Thermoflow
  22. Condensate Pump, return distribution systems.
  23. Refrigerant line question
  24. Reconstructing model number
  25. Verifying Capacity
  26. Well Conditioned Attic
  27. Water heater flue - is this allowed?
  28. Quietside age?
  29. Weil-Mclain co water heater prob.
  30. Comfortstar unit
  31. 410A Condenser and R22 Evaporator Coil
  32. Return air
  33. Contractors don't read
  34. Testo 560
  35. No Maufucturer Name Listed
  36. Dead body
  37. Oil leakage observed at AC coolant line at bonnet -- too cold to run unit
  38. Gas line from meter to interior of home
  39. Todays gem
  40. Old American Standard boiler help
  41. Boiler vent
  42. Condensate discharge
  43. Rooftop a/c unit condensate discharge
  44. L vent to single wall?
  45. Flue Configuration
  46. Record high temps forcast for SoCal
  47. Condensate lines
  48. Acceptable?
  49. Who to refer?
  50. Help your AC with mist???
  51. Any other reason for burner wont stay lit?
  52. Combustion Analysis
  53. Do you measure Delta T?
  54. Goodman tonnage
  55. Exterior A/C condenser clearances
  56. Gas line in front of vent
  57. Chrysler Airtemp Blower Motor
  58. Failed Inducer Motor Replacement
  59. Another unsuspecting loose connection
  60. A loaded question # 2
  61. A loaded question
  62. Thorough HVAC inspection by HVAC technician
  63. Evaporator ages
  64. Purpose of vent??
  65. Testing Furnace and A/C
  66. Replacing diesel with gas furnace
  67. A plastic vent inquiry
  68. House built in 1971 - Do these ducts look like they contain asbestos ?
  69. Dryer Vent Length
  70. Furnace in closet
  71. Age of Furnace
  72. How to rewire furnace from stoneage
  73. Century Age
  74. Minimum clearance of baseboard
  75. How many gas vents into 6" flue?
  76. Metal Chimney Clearance
  77. Question For Ben Gromicko
  78. Is it worth replacing electric baseboard?
  79. Age please?
  80. HVAC wiring
  81. Is this pipe accectable for fireplace gas line?
  82. payne package unit
  83. Down Periscope or Crazy A/C Venting Gone Wrong?
  84. combustion air and exhaust appear merged
  85. Close the combustion air...
  86. Gas only fireplace hearth requirments
  87. Age Code App
  88. Ducts to fresh air
  89. Flex hose connected to fireplace manifild....Need advice
  90. Water heater vent ducting...need advice
  91. Does this Heater vent need a heat collar?
  92. Exposed chimney in bedroom
  93. David or Charley
  94. Venting Narrative
  95. AC differential temps
  96. What's Your Narrative on This One?
  97. Age of furnace
  98. secondary drain on a vertical unit
  99. Help With Geo-Thermal Heat Pump
  100. VERY humid AC air
  101. Exposed B-Vent in closet
  102. Need an opinion
  103. Unknown thingy on water heater
  104. Crane heating unit age?
  105. Hot water Boiler age (Bryant)
  106. Sidewall Vents in Vertical Position
  107. First For Me
  108. waterless traps
  109. HVAC Plumbing
  110. Old oil furnace
  111. Tempstar - Burner problems?
  112. Home Heating Oil Tanks. Another InterNACHI inspection-related article.
  113. best technique opinions
  114. Burn baby Burn!!
  115. Dryer vent screen
  116. Older Bard AC condenser
  117. Off Season Testing
  118. Maratherm AC tonnage and age
  119. Boiler in garage Part II
  120. Excessive moisture in exhaust pipe.
  121. When would a vent be required in a bathroom?
  122. Hot duct?
  123. breaker too large for AC
  124. Never seen this done before - stripped the outside off of flue
  125. Boiler / W/H in garage?
  126. CSA approved
  127. Anybody seen these yet?
  128. Need age of Miller Gas Furnace
  129. Need advice
  130. Need advice
  131. Help
  132. Broan
  133. One just for Charley
  134. Weil-McLain Boiler Age help requested
  135. Whats the problem?
  136. Geothermal
  137. Disconnected AC ducing....Need feedback
  138. only have seral #
  139. Is my A/C evaporator broken?
  140. Furnace Maintenance - Keep Your Furnace Clean!
  141. Do you thinks it will pass inspection?
  142. York age
  143. Roof top heat pump units
  144. Water trap?
  145. Age on Kewanee boiler
  146. air duct penetrating garage wall
  147. Furnace in attic
  148. Water filled ducting
  149. Maybe next time around......
  150. AAF
  151. disconnect for red package unit
  152. Mildew on mastic @ plenum 10 month home
  153. Fan A/C compressor
  154. Age of unit
  155. Gas Pack Unit
  156. Does any one know how to read this
  157. high humidity and floor lifting
  158. Ducane A/C Compressor age
  159. Heil - Intl Comfort
  160. Source to Determine HVAC Manufacture Date
  161. Coleman condenser age
  162. need to find age of free standing furnace
  163. New Roof...New Siding...New HVAC...
  164. Kelvinator Furnace age?
  165. Need code reference for AC condensate drain line
  166. Age and tonage of split central air unit handler
  167. Upper Element
  168. Cast iron Galaxy boiler age?
  169. Help with age
  170. Age of a Luxaire(?) Unit
  171. Age of Carrier A/H
  172. Help with Wiring
  173. Combination water heater/space heater
  174. Sharp-GE A/C recall
  175. Furnace exhaust
  176. Buderus date code
  177. How Old - Airtemp nat gas furnace?
  178. Air exchanger recall
  179. duct work
  180. Water Damaged surfaces within the HVAC return - do you test?
  181. Any chance this is not Asbestos ?
  182. Peerless boiler age
  183. another return air...
  184. Permits ignored. Re-do costs $$$. Whose fault?
  185. Code - Backup condensate drain line being plumbed to exterior
  186. Heat exchangers - visible defects
  187. A/C compressor fins?
  188. Age of Coleman AC
  189. What would you say about this vent placement?
  190. Age of Fedders unit.
  191. Cold air return duct placement
  192. Thermostat?
  193. InterNACHI HVAC Training Video (Indexed)
  194. A little rattle.........
  195. Furnace flue
  196. Age of air conditioners
  197. Partially Buried Oil Tank in Basement Question
  198. What is the Free Area of Register Covers?
  199. How not to install a return air
  200. Well head or fill pipe?
  201. I don't understand
  202. Heil oil furnace age
  203. WYE????
  204. Water Heater Exhaust Location with Furnace and Masonry Chimney
  205. Comfortmaker date of manufacture?
  206. Black soot in HE furnace vent
  207. Asbestos??
  208. Weil McLain CP Lookup
  209. Research into copper coils and pans
  210. Amana Furnace Age
  211. Should I run the AC?
  212. Furnace Age
  213. What is this thing in the return plenum box?
  214. Dryer vented into garage
  215. Armstrong eg6g100dc20-4 furnace problems
  216. Ducting Question....
  217. Checking the float switch
  218. Is the HRV part of the SOP
  219. Garage question
  220. exhaust pipe enlarged...a text book no-no
  221. Furnace exhaust too close to heat pump
  222. Attic upflow furnace
  223. TPR - pipe run...question
  224. Plugged and Clogged Condensate and A Coil
  225. Montgomery Ward Signature Age
  226. Need help today with geo thermal date
  227. Late model Westinghouse furnace age
  228. HVAC
  229. Age of units
  230. Mitsubishi Electic System
  231. Trane Heat Pump - right choice for Illinois?
  232. Brock Elite Air Oil furnace
  233. Refrigerant Locking Caps
  234. Condensation Line
  235. Attic air handler installation
  236. steam pipe as heat source?
  237. Downdraft furnace question
  238. Geothermal - GFCI
  239. line size question
  240. Goodman Heat Pump or AC?
  241. Frosty ref. line at ev. coil?
  242. Unusual HVAC Vent
  243. Strange filter
  244. I do not see these too often
  245. R-410a
  246. a bit off topic...
  247. Testing HVAC equipment
  248. 2008 4 ton
  249. HVAC information
  250. Less than desirable supply air