# New Furnace Install **URL:** \ **Category:** NYSpeed Off Topic\ **Created:** [November 3, 2009, 10:59am UTC](https://forums.speedlife.net/t/new-furnace-install/75668 "2009-11-03T10:59:05Z")\ **Posts on this page:** 18\ **Page:** 3
**Author:** ![theblue](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/theblue/32/5074_2.png) [@theblue](https://forums.speedlife.net/u/theblue)\ **Post date:** [November 4, 2009, 10:12am UTC](https://forums.speedlife.net/t/new-furnace-install/75668/41 "2009-11-04T10:12:07Z")
we’re talking about 95%+ efficient here, there is not a lot of waste. ---
**Author:** ![LUKE\_L](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/luke_l/32/7462_2.png) [@LUKE\_L](https://forums.speedlife.net/u/LUKE_L)\ **Post date:** [November 4, 2009, 12:16pm UTC](https://forums.speedlife.net/t/new-furnace-install/75668/42 "2009-11-04T12:16:37Z")
> [@97FormulaWS-6](#): > > The PVC pipes are the air for the combustion chamber; ones’s a air feed, the other is the exhaust. > > All High-Efficency Forced Air furnances are this way. Makes sense. ---
**Author:** ![Blue\_Eyed\_Devil](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/blue_eyed_devil/32/7292_2.png) [@Blue\_Eyed\_Devil](https://forums.speedlife.net/u/Blue_Eyed_Devil)\ **Post date:** [November 4, 2009, 12:21pm UTC](https://forums.speedlife.net/t/new-furnace-install/75668/43 "2009-11-04T12:21:36Z")
I believe the fan pulls in cool air so the ratio of hot air exhausting is lowered. ---
**Author:** ![ProgRocker](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/progrocker/32/5434_2.png) [@ProgRocker](https://forums.speedlife.net/u/ProgRocker)\ **Post date:** [November 4, 2009, 7:38pm UTC](https://forums.speedlife.net/t/new-furnace-install/75668/44 "2009-11-04T19:38:11Z")
What’s the benefit of PVC or the traditional duct work? Do more heating/cooling places use PVC now? ---
**Author:** ![TurboTSi](https://avatars.discourse-cdn.com/v4/letter/t/22d042/32.png) [@TurboTSi](https://forums.speedlife.net/u/TurboTSi)\ **Post date:** [November 4, 2009, 8:23pm UTC](https://forums.speedlife.net/t/new-furnace-install/75668/45 "2009-11-04T20:23:10Z")
> [@JayS](#): > > Any idea why? I mean, my hot water heater vents out my chimney all spring, summer and fall without the furnace running so why should venting a new furnace differently matter? You left out one very important season… Winter, and how the draft that is created. I am by no means a thermal engineer, but I’ll do my best to explain it as it was explained to me. The larger the chimney, the more it has to heat up in the winter to expel the exhaust from furnaces and hot water tanks. Your original chimney was designed to vent hot gasses from oil burning heaters or low efficiency heaters. Therefore, when the old furnace uses the chimney there isn’t a problem because it gets warm enough to pull the exhaust through the top. The HWT will never heat up a large chimney designed for an old furnace, so the gasses from the HWT kind of sit in the chimney causing it to A.) create condensation, a byproduct of combusted natural gas, which will weaken the masonry of the chimney and B.) the cold dense air will not allow the exhaust gas from the HWT to rise and will then spill Carbon Monoxide back into your basement. The only way to make it work is put a smaller chimney in, thus the 4 or 5 inch stainless chimney liner, which is just dryer vent tubing BTW. ---
**Author:** ![jrod0187](https://avatars.discourse-cdn.com/v4/letter/j/ac91a4/32.png) [@jrod0187](https://forums.speedlife.net/u/jrod0187)\ **Post date:** [November 5, 2009, 3:54am UTC](https://forums.speedlife.net/t/new-furnace-install/75668/46 "2009-11-05T03:54:13Z")
If you know what you’re doing and have the right tools this is an easy install, just time consuming. The only part that sucks is running the condensate and air intake PVC pipes and doing the sheet metal work. :tup: to you… looks good! ---
**Author:** ![Jeller](https://avatars.discourse-cdn.com/v4/letter/j/bc8723/32.png) [@Jeller](https://forums.speedlife.net/u/Jeller)\ **Post date:** [November 5, 2009, 5:06am UTC](https://forums.speedlife.net/t/new-furnace-install/75668/47 "2009-11-05T05:06:12Z")
Nice job pat :tup: HVAC is not something I have ever dabbled in. ---
**Author:** ![JayS](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/jays/32/15375_2.png) [@JayS](https://forums.speedlife.net/u/JayS)\ **Post date:** [November 5, 2009, 5:12am UTC](https://forums.speedlife.net/t/new-furnace-install/75668/48 "2009-11-05T05:12:21Z")
> [@TurboTSi](#): > > You left out one very important season… Winter, and how the draft that is created. > > I am by no means a thermal engineer, but I’ll do my best to explain it as it was explained to me. The larger the chimney, the more it has to heat up in the winter to expel the exhaust from furnaces and hot water tanks. Your original chimney was designed to vent hot gasses from oil burning heaters or low efficiency heaters. Therefore, when the old furnace uses the chimney there isn’t a problem because it gets warm enough to pull the exhaust through the top. > > The HWT will never heat up a large chimney designed for an old furnace, so the gasses from the HWT kind of sit in the chimney causing it to A.) create condensation, a byproduct of combusted natural gas, which will weaken the masonry of the chimney and B.) the cold dense air will not allow the exhaust gas from the HWT to rise and will then spill Carbon Monoxide back into your basement. > > The only way to make it work is put a smaller chimney in, thus the 4 or 5 inch stainless chimney liner, which is just dryer vent tubing BTW. :tup: Makes sense. ---
**Author:** ![97FormulaWS-6](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/97formulaws-6/32/7384_2.png) [@97FormulaWS-6](https://forums.speedlife.net/u/97FormulaWS-6)\ **Post date:** [November 5, 2009, 5:30am UTC](https://forums.speedlife.net/t/new-furnace-install/75668/49 "2009-11-05T05:30:25Z")
> [@ProgRocker](#): > > What’s the benefit of PVC or the traditional duct work? Do more heating/cooling places use PVC now? The PVC is just for feading the air to/from the furnance for combustion; the traditional “duct work” for the house air is still there. The PVC just replaces using a traditional chimney out the roof and allows the furnace to burn outside air instead of stealing inside air for combustion. ---
**Author:** ![93dx\_hatch](https://avatars.discourse-cdn.com/v4/letter/9/90ced4/32.png) [@93dx\_hatch](https://forums.speedlife.net/u/93dx_hatch)\ **Post date:** [November 5, 2009, 5:30am UTC](https://forums.speedlife.net/t/new-furnace-install/75668/50 "2009-11-05T05:30:32Z")
> [@Xander](#): > > Nice work Pat. i can say HVAC is one of the few systems I haven’t done myself yet. > > X… > [@Jeller](#): > > Nice job pat :tup: HVAC is not something I have ever dabbled in. I might be able to give you both an opportunity ---
**Author:** ![drvnkd](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/drvnkd/32/109615_2.png) [@drvnkd](https://forums.speedlife.net/u/drvnkd)\ **Post date:** [November 5, 2009, 7:02am UTC](https://forums.speedlife.net/t/new-furnace-install/75668/51 "2009-11-05T07:02:29Z")
So, how hard is the sheet metal fab w/o a brake? ---
**Author:** ![FiftyCheven](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/fiftycheven/32/4950_2.png) [@FiftyCheven](https://forums.speedlife.net/u/FiftyCheven)\ **Post date:** [November 5, 2009, 7:41am UTC](https://forums.speedlife.net/t/new-furnace-install/75668/52 "2009-11-05T07:41:31Z")
:tup: good stuff. This is exactly why i am DIY’ing my central air in the spring. Ordering online is the way to go for those who dont have contractor hook ups. quoted $5k for CA installed…got my whole setup, with everything needed for install, plus a humidifier for $2300 to my door. all good shit too. ---
**Author:** ![gonzo891](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/gonzo891/32/5250_2.png) [@gonzo891](https://forums.speedlife.net/u/gonzo891)\ **Post date:** [November 5, 2009, 1:50pm UTC](https://forums.speedlife.net/t/new-furnace-install/75668/53 "2009-11-05T13:50:01Z")
> [@FiftyCheven](#): > > :tup: good stuff. > > This is exactly why i am DIY’ing my central air in the spring. Ordering online is the way to go for those who dont have contractor hook ups. quoted $5k for CA installed…got my whole setup, with everything needed for install, plus a humidifier for $2300 to my door. all good shit too. what do you consider good shit? ---
**Author:** ![FiftyCheven](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/fiftycheven/32/4950_2.png) [@FiftyCheven](https://forums.speedlife.net/u/FiftyCheven)\ **Post date:** [November 5, 2009, 1:55pm UTC](https://forums.speedlife.net/t/new-furnace-install/75668/54 "2009-11-05T13:55:00Z")
^^goodman brand unit…and just the overall quality of parts and supplies for the install. got my setup from [alpinehomeair.com](http://alpinehomeair.com) You tell them what you want and they build a system for you, and give you 3 to choose from, on a good, better and best scale or you can customize it and buy what you want. i went with their “better package”. ---
**Author:** ![OneFastMonkey](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/onefastmonkey/32/7241_2.png) [@OneFastMonkey](https://forums.speedlife.net/u/OneFastMonkey)\ **Post date:** [November 10, 2009, 4:22pm UTC](https://forums.speedlife.net/t/new-furnace-install/75668/55 "2009-11-10T16:22:06Z")
> [@93dx--hatch](#): > > I might be able to give you both an opportunity I would be willing to help anyone install theirs. Let me know. ---
**Author:** ![OneFastMonkey](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/onefastmonkey/32/7241_2.png) [@OneFastMonkey](https://forums.speedlife.net/u/OneFastMonkey)\ **Post date:** [November 10, 2009, 4:23pm UTC](https://forums.speedlife.net/t/new-furnace-install/75668/56 "2009-11-10T16:23:07Z")
[quote=“drvnkd,post:51,topic:75668"”] So, how hard is the sheet metal fab w/o a brake? [/quote] I am sure the sheetmetal would be pretty difficult with out a brake but I had mine ordered from my office. ---
**Author:** ![gonzo891](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/gonzo891/32/5250_2.png) [@gonzo891](https://forums.speedlife.net/u/gonzo891)\ **Post date:** [November 10, 2009, 5:24pm UTC](https://forums.speedlife.net/t/new-furnace-install/75668/57 "2009-11-10T17:24:03Z")
> [@OneFastMonkey](#): > > I am sure the sheetmetal would be pretty difficult with out a brake but I had mine ordered from my office. they sell folding bars (sheet metal hand brake) at any plumbing supply store. fabbing up your own plenum is fairly easy, i do it on the regular. ---
**Author:** ![drvnkd](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/drvnkd/32/109615_2.png) [@drvnkd](https://forums.speedlife.net/u/drvnkd)\ **Post date:** [November 11, 2009, 6:20am UTC](https://forums.speedlife.net/t/new-furnace-install/75668/58 "2009-11-11T06:20:15Z")
> [@OneFastMonkey](#): > > I am sure the sheetmetal would be pretty difficult with out a brake but I had mine ordered from my office. So you ordered a pre fab one? [Previous page](https://forums.speedlife.net/t/new-furnace-install/75668.md?page=2)