HVAC Forum

1,655 topics in this forum

1. Apollo HydroHeat -- known problems? 1 2 3 4 10

   By AHI in AR, September 29, 2008
   • 236 replies
   • 171.2k views
   • 
   • hausdok
   • November 1, 2023

2. A coil/Condensor sizing 1 2 3 4 5

   By fyrmnk, April 28, 2006
   • 119 replies
   • 69.3k views
   • 
   • fyrmnk
   • April 28, 2006

3. Yet another furnace age question, Old Airco 1 2 3 4

   By Mark P, October 10, 2012
   • 93 replies
   • 56.2k views
   • 
   • mmahdi
   • November 20, 2023

4. Mini split lines frosting up 1 2 3

   By John Dirks Jr, June 8, 2019
   • 72 replies
   • 21.2k views
   • 
   • Trent Tarter
   • August 11, 2021

5. Aqua Therm heating system 1 2 3

   By Robert Jones, February 1, 2009
   • 54 replies
   • 65.3k views
   • 
   • hausdok
   • February 20, 2021

6. Gas water heater/oil fired furnace sharing flue 1 2 3

   By Bill Kibbel, January 14, 2008
   • 52 replies
   • 32.4k views
   • 
   • Chad Fabry
   • March 16, 2021

7. Dating a Sears furnace 1 2

   By drw, May 7, 2007
   • 47 replies
   • 13.8k views
   • 
   • Les
   • August 15, 2011

8. Propane heating 1 2

   By nookandcranny, June 22, 2011
   • 47 replies
   • 8.8k views
   • 
   • davidmcg
   • June 30, 2011

9. Can someone explain this to me? 1 2

   By blazenut, October 10, 2009
   • 44 replies
   • 9.3k views
   • 
   • ghentjr
   • October 16, 2009

10. Expansion tanks 1 2

    By denable, March 16, 2004
    • 43 replies
    • 9.4k views
    • 
    • Terence McCann
    • March 17, 2004

11. York Affinity Modulating Furnace Venting 1 2

    By bay_dragon, January 6, 2009
    • 43 replies
    • 19.8k views
    • 
    • bay_dragon
    • January 12, 2009

12. Overheating Circuit Board? 1 2

    By Jim Katen, June 14, 2018
    • 43 replies
    • 5.4k views
    • 
    • Troyster510
    • December 14, 2022

13. Instructions or code 1 2

    By Chris Bernhardt, February 15, 2007
    • 41 replies
    • 5.7k views
    • 
    • Erby
    • February 25, 2007

14. Puzzler 1 2

    By kurt, June 7, 2016
    • 41 replies
    • 4.4k views
    • 
    • Jim Katen
    • June 14, 2016

15. Furnace Sizing 1 2

    By kurt, January 19, 2010
    • 39 replies
    • 6.2k views
    • 
    • RobC
    • February 12, 2010

16. New air handler/furnace/gas 1 2

    By tim5055, January 6, 2017
    • 37 replies
    • 4.8k views
    • 
    • Trent Tarter
    • February 24, 2017

17. Fiberglass Ductboard 1 2

    By Les, March 10, 2004
    • 36 replies
    • 57.3k views
    • 
    • Jim Katen
    • August 28, 2020

18. Finding furnace age 1 2

    By jodil, February 10, 2008
    • 36 replies
    • 26.6k views
    • 
    • Bill Kibbel
    • August 30, 2011

19. Steam 1 2

    By kurt, December 5, 2013
    • 36 replies
    • 5.5k views
    • 
    • kurt
    • December 9, 2013

20. Garage furnace venting problem 1 2

    By tcfinishing, January 26, 2009
    • 35 replies
    • 22.8k views
    • 
    • orangetang
    • November 21, 2011

21. steam or hydronic? 1 2

    By John Dirks Jr, September 15, 2010
    • 35 replies
    • 5k views
    • 
    • MPdesign
    • September 21, 2010

22. Condensation on double pane windows - Help. 1 2

    By netminder, December 12, 2010
    • 35 replies
    • 5.2k views
    • 
    • Steven Hockstein
    • December 13, 2010

23. hvac sizing 1 2

    By John Dirks Jr, February 10, 2012
    • 35 replies
    • 4.5k views
    • 
    • Tom Raymond
    • February 15, 2012

24. Boiler in Finished Basement II (*quiz) 1 2

    By Jeff Remas, January 4, 2009
    • 34 replies
    • 6.9k views
    • 
    • energy star
    • January 5, 2009

25. condenser pad 1 2

    By John Dirks Jr, April 18, 2009
    • 34 replies
    • 25k views
    • 
    • John Dirks Jr
    • April 18, 2009