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HVAC question
Hello,
I have a 2600 sq ft 4 level split home in Canada. It was built in 1985. This past spring we replaced our very non-effecient furnace with a Tempstar 95% effecient gas furnace. It really is wonderful as the old furnace would cause the house to feel sort of drafty and basement was always cold etc... Now I have this furnace that I love to bits BUT now since it has gotten colder outside these past two weeks, we have kept the doors and windows closed and now have a high humidity problem inside the home IE: fogged up windows (triple pane)...air basically feels clammy...bought a humidistat and the house is sitting at around 50% humidity.... we use bathroom fans in the shower, and have a fan over the stove when cooking that we use all the time...we keep lids on pots on the stove etc...We have no children and only the two of us in this home so no long lingering showers by kids or anyone else.... I don't want to have to buy a dehumidifier over this new furnace.. sort of defeats the idea of trying to be energy effecient... Thinking of trying to duct in an outside air source to feed the furnace? Thoughts? Thanks... Jim |
HVAC question
Jim wrote:
Hello, I have a 2600 sq ft 4 level split home in Canada. It was built in 1985. This past spring we replaced our very non-effecient furnace with a Tempstar 95% effecient gas furnace. It really is wonderful as the old furnace would cause the house to feel sort of drafty and basement was always cold etc... Now I have this furnace that I love to bits BUT now since it has gotten colder outside these past two weeks, we have kept the doors and windows closed and now have a high humidity problem inside the home IE: fogged up windows (triple pane)...air basically feels clammy...bought a humidistat and the house is sitting at around 50% humidity.... we use bathroom fans in the shower, and have a fan over the stove when cooking that we use all the time...we keep lids on pots on the stove etc...We have no children and only the two of us in this home so no long lingering showers by kids or anyone else.... I don't want to have to buy a dehumidifier over this new furnace.. sort of defeats the idea of trying to be energy effecient... Thinking of trying to duct in an outside air source to feed the furnace? Thoughts? Thanks... Jim Hi, Fresh air intake is two ways, one for combustion for the furnace and one going into return air duct. Wonder if it is damper controlled and it is operational in your case. Too air tight home definitely needs outside fresh air in proper amount. My house is R2000 spec. We have damper controlled outside air intake. Yet I am running a power humidifier in the winter. I am in Calgary that is why. Our winter air is extremely dry. |
HVAC question
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HVAC question
wrote in message ... On Sun, 18 Oct 2009 18:54:36 -0600, "Jim" nospam@wherever wrote: Hello, I have a 2600 sq ft 4 level split home in Canada. It was built in 1985. This past spring we replaced our very non-effecient furnace with a Tempstar 95% effecient gas furnace. It really is wonderful as the old furnace would cause the house to feel sort of drafty and basement was always cold etc... Now I have this furnace that I love to bits BUT now since it has gotten colder outside these past two weeks, we have kept the doors and windows closed and now have a high humidity problem inside the home IE: fogged up windows (triple pane)...air basically feels clammy...bought a humidistat and the house is sitting at around 50% humidity.... we use bathroom fans in the shower, and have a fan over the stove when cooking that we use all the time...we keep lids on pots on the stove etc...We have no children and only the two of us in this home so no long lingering showers by kids or anyone else.... I don't want to have to buy a dehumidifier over this new furnace.. sort of defeats the idea of trying to be energy effecient... Thinking of trying to duct in an outside air source to feed the furnace? Thoughts? Thanks... Jim 50% RH is "high"? I guess to me it is...I also have an indoor swimming pool in the back yard (not attached to house) and I keep the RH in that building to 30-35%...I park my BMW in the same building with no issues.... Jim |
HVAC question
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HVAC question
"Jim" nospam@wherever wrote in message ... Hello, we have kept the doors and windows closed and now have a high humidity problem inside the home IE: fogged up windows (triple pane)...air basically feels clammy...bought a humidistat and the house is sitting at around 50% humidity.... In winter, I sometimes have to run a humidifier to get the humidity up to 50%. Outside combustion air is quite common on high efficiency units but I'm not sure it would lower the humidity level. Right now, the moist internal air is being used and going out the stack and infiltration is replacing it with the outside air. You may want to experiment a bit and crack a window open in the room with the furnace and close it off from the rest of the house. |
HVAC question
I have a 2600 sq ft 4 level split home in Canada. It was built in 1985. This past spring we replaced our very non-effecient furnace with a Tempstar 95% effecient gas furnace. It really is wonderful as the old furnace would cause the house to feel sort of drafty and basement was always cold etc... Now I have this furnace that I love to bits BUT now since it has gotten colder outside these past two weeks, we have kept the doors and windows closed and now have a high humidity problem inside the home IE: fogged up windows (triple pane)...air basically feels clammy...bought a humidistat and the house is sitting at around 50% humidity.... we use bathroom fans in the shower, and have a fan over the stove when cooking that we use all the time...we keep lids on pots on the stove etc...We have no children and only the two of us in this home so no long lingering showers by kids or anyone else.... I don't want to have to buy a dehumidifier over this new furnace.. sort of defeats the idea of trying to be energy effecient... Thinking of trying to duct in an outside air source to feed the furnace? Thoughts? Thanks... Jim *If the unit is the type that I am thinking of you should have two PVC pipes coming off of it. One is for fresh air and the other is exhaust. The exhaust pipe must be pitched (Sloped downwards slightly) towards the outside so that condensation will drain outside and not into the unit. Check to see if that is so. Also if your unit is not pulling air in directly from the outside it would be a good idea to bring fresh air into the room. |
HVAC question
"Jim" nospam@wherever wrote in message ... Hello, I have a 2600 sq ft 4 level split home in Canada. It was built in 1985. This past spring we replaced our very non-effecient furnace with a Tempstar 95% effecient gas furnace. It really is wonderful as the old furnace would cause the house to feel sort of drafty and basement was always cold etc... Now I have this furnace that I love to bits BUT now since it has gotten colder outside these past two weeks, we have kept the doors and windows closed and now have a high humidity problem inside the home IE: fogged up windows (triple pane)...air basically feels clammy...bought a humidistat and the house is sitting at around 50% humidity.... we use bathroom fans in the shower, and have a fan over the stove when cooking that we use all the time...we keep lids on pots on the stove etc...We have no children and only the two of us in this home so no long lingering showers by kids or anyone else.... I don't want to have to buy a dehumidifier over this new furnace.. sort of defeats the idea of trying to be energy effecient... Thinking of trying to duct in an outside air source to feed the furnace? Thoughts? Thanks... Jim Something does'nt add up about this post.......................... Are you saying the house was likely drier at this time last year, and this problem is brand new? The furnace you have now *makes* water, so to speak, but it should'nt *contribute* to a high humidity level in the house. It should heat and dry the air like any furnace would. The discharge air may be slightly cooler than the air from your old one, but other wise it's pretty much apples to apples. I would check to make sure that the furnace is not an internal leaker, and the drain system is actually disposing of the water in a fashion where it leaves the house. If there are no issues found with the furnace, then I would look elsewhere for a humidity problem, if you indeed have one. I would think that you are going to need a humidifier soon, like everyone else, not a dehumidifier. HTH, Lefty |
HVAC question
On Oct 18, 7:54*pm, "Jim" nospam@wherever wrote:
Hello, * * * * I have a 2600 sq ft 4 level split home in Canada. It was built in 1985. This past spring we replaced our very non-effecient furnace with a Tempstar 95% effecient gas furnace. It really is wonderful as the old furnace would cause the house to feel sort of drafty and basement was always cold etc... Now I have this furnace that I love to bits BUT now since it has gotten colder outside these past two weeks, we have kept the doors and windows closed and now have a high humidity problem inside the home IE: fogged up windows (triple pane)...air basically feels clammy...bought a humidistat and the house is sitting at around 50% humidity.... we use bathroom fans in the shower, and have a fan over the stove when cooking that we use all the time...we keep lids on pots on the stove etc...We have no children and only the two of us in this home so no long lingering showers by kids or anyone else.... * * * *I don't want to have to buy a dehumidifier over this new furnace.. sort of defeats the idea of trying to be energy effecient... Thinking of trying to duct in an outside air source to feed the furnace? * *Thoughts? Thanks... Jim In fall for the first month of heating system operation I have the same problem and so do many with tight homes. The house has to dry out a bit. Get air to circulate, leave a few windows cracked open. Does your home have a house wrap like Tyvek, I bet condensation goes away in a month, open windows will help. |
HVAC question
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HVAC question
Makes me wonder if the installers added a humidifier. If so,
it may be set too high. Please call whoever installed the furnace, they are likely to know the details. -- Christopher A. Young Learn more about Jesus www.lds.org .. "Jim" nospam@wherever wrote in message ... Hello, I have a 2600 sq ft 4 level split home in Canada. It was built in 1985. This past spring we replaced our very non-effecient furnace with a Tempstar 95% effecient gas furnace. It really is wonderful as the old furnace would cause the house to feel sort of drafty and basement was always cold etc... Now I have this furnace that I love to bits BUT now since it has gotten colder outside these past two weeks, we have kept the doors and windows closed and now have a high humidity problem inside the home IE: fogged up windows (triple pane)...air basically feels clammy...bought a humidistat and the house is sitting at around 50% humidity.... we use bathroom fans in the shower, and have a fan over the stove when cooking that we use all the time...we keep lids on pots on the stove etc...We have no children and only the two of us in this home so no long lingering showers by kids or anyone else.... I don't want to have to buy a dehumidifier over this new furnace.. sort of defeats the idea of trying to be energy effecient... Thinking of trying to duct in an outside air source to feed the furnace? Thoughts? Thanks... Jim |
HVAC question
On Sun, 18 Oct 2009 18:54:36 -0600, "Jim" nospam@wherever wrote:
Hello, I have a 2600 sq ft 4 level split home in Canada. It was built in 1985. This past spring we replaced our very non-effecient furnace with a Tempstar 95% effecient gas furnace. It really is wonderful as the old furnace would cause the house to feel sort of drafty and basement was always cold etc... Now I have this furnace that I love to bits BUT now since it has gotten colder outside these past two weeks, we have kept the doors and windows closed and now have a high humidity problem inside the home IE: fogged up windows (triple pane)...air basically feels clammy...bought a humidistat and the house is sitting at around 50% humidity.... What did you change in addition to the furnace? Windows? insulation? Did the furnace come with a humidifier? The last would be my guess-- and it should have both an adjustment and an outside sensor. What does the installer say? Jim |
HVAC question
On Oct 19, 8:16*am, Jim Elbrecht wrote:
On Sun, 18 Oct 2009 18:54:36 -0600, "Jim" nospam@wherever wrote: Hello, * * * *I have a 2600 sq ft 4 level split home in Canada. It was built in 1985. This past spring we replaced our very non-effecient furnace with a Tempstar 95% effecient gas furnace. It really is wonderful as the old furnace would cause the house to feel sort of drafty and basement was always cold etc... Now I have this furnace that I love to bits BUT now since it has gotten colder outside these past two weeks, we have kept the doors and windows closed and now have a high humidity problem inside the home IE: fogged up windows (triple pane)...air basically feels clammy...bought a humidistat and the house is sitting at around 50% humidity.... What did you change in addition to the furnace? *Windows? *insulation? Did the furnace come with a humidifier? The last would be my guess-- and it should have both an adjustment and an outside sensor. What does the installer say? Jim It's possible the new furnace has a seperate intake where it pulls outside air in for combustion. The old one drew air directly from outside, so there was always a significant amount of fresh air being pulled into the house, at least into the basement. That would have lowered the humidity, but now that is gone. I agree with others who have said 50% humidity isn't excessively high and it shouldn't make it feel clammy. It is the highest you would want it though, otherwise you risk condensation. You wouldn't want it that high when it's 15 outside, but by then with the furnace running more, it's likely the humidity will decrease. |
HVAC question
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HVAC question
On Mon, 19 Oct 2009 05:47:04 -0700, trader4 wrote:
On Oct 19, 8:16Â*am, Jim Elbrecht wrote: On Sun, 18 Oct 2009 18:54:36 -0600, "Jim" nospam@wherever wrote: Hello, Â* Â* Â* Â*I have a 2600 sq ft 4 level split home in Canada. It was built in 1985. This past spring we replaced our very non-effecient furnace with a Tempstar 95% effecient gas furnace. It really is wonderful as the old furnace would cause the house to feel sort of drafty and basement was always cold etc... Now I have this furnace that I love to bits BUT now since it has gotten colder outside these past two weeks, we have kept the doors and windows closed and now have a high humidity problem inside the home IE: fogged up windows (triple pane)...air basically feels clammy...bought a humidistat and the house is sitting at around 50% humidity.... What did you change in addition to the furnace? Â*Windows? Â*insulation? Did the furnace come with a humidifier? The last would be my guess-- and it should have both an adjustment and an outside sensor. What does the installer say? Jim It's possible the new furnace has a seperate intake where it pulls outside air in for combustion. Hmm. Ours has an intake and outlet to the outside world - but it also has a small shoebox-sized pump beside it, which collects moisture and pumps it into the waste water system for the house. I'm not sure if that pump is for extracting moisture that's in the air, or from the gas supply - but given the way it's floor mounted beside the furnace it looks like optional extra equipment, as otherwise surely it'd be built into the furnace... If it *is* optional on furnaces and the OP doesn't have it, maybe they need it, whatever its exact function is... (just idle speculation, not based on any knowledge of how furnaces work! :-) cheers Jules |
HVAC question
On Oct 19, 1:31*pm, Jules
wrote: On Mon, 19 Oct 2009 05:47:04 -0700, trader4 wrote: On Oct 19, 8:16*am, Jim Elbrecht wrote: On Sun, 18 Oct 2009 18:54:36 -0600, "Jim" nospam@wherever wrote: Hello, * * * *I have a 2600 sq ft 4 level split home in Canada. It was built in 1985. This past spring we replaced our very non-effecient furnace with a Tempstar 95% effecient gas furnace. It really is wonderful as the old furnace would cause the house to feel sort of drafty and basement was always cold etc... Now I have this furnace that I love to bits BUT now since it has gotten colder outside these past two weeks, we have kept the doors and windows closed and now have a high humidity problem inside the home IE: fogged up windows (triple pane)...air basically feels clammy...bought a humidistat and the house is sitting at around 50% humidity.... What did you change in addition to the furnace? *Windows? *insulation? Did the furnace come with a humidifier? The last would be my guess-- and it should have both an adjustment and an outside sensor. What does the installer say? Jim It's possible the new furnace has a seperate intake where it pulls outside air in for combustion. Hmm. Ours has an intake and outlet to the outside world - but it also has a small shoebox-sized pump beside it, which collects moisture and pumps it into the waste water system for the house. I'm not sure if that pump is for extracting moisture that's in the air, or from the gas supply - but given the way it's floor mounted beside the furnace it looks like optional extra equipment, as otherwise surely it'd be built into the furnace... If it *is* optional on furnaces and the OP doesn't have it, maybe they need it, whatever its exact function is... (just idle speculation, not based on any knowledge of how furnaces work! :-) cheers Jules- Hide quoted text - - Show quoted text - That pump is to pump out the water byproduct of the gas burning. On older lower effeciency furnaces the water would go out as vapor. On newer furnaces the exhaust temp is too low so the water condenses. It's optional because some people have a drain nearby in the floor tha the pipe can be routed to. Yours maybe has to pump up to a sink drain or something like that? |
HVAC question
On Mon, 19 Oct 2009 10:39:29 -0700, jamesgangnc wrote:
That pump is to pump out the water byproduct of the gas burning. On older lower effeciency furnaces the water would go out as vapor. On newer furnaces the exhaust temp is too low so the water condenses. It's optional because some people have a drain nearby in the floor tha the pipe can be routed to. Yours maybe has to pump up to a sink drain or something like that? Yeah, that's it. We've got no drain in the basement floor, and the main pipe to the septic runs at about chest height along the basement wall. The pump raises it about 8' though, where it taps into one of the drain lines running from a sink. Sounds like it's irrelevant to the OP's problem, then... cheers Jules |
HVAC question
It's called a "condensate pump". One of the reasons 90
percenters are so efficient, they condense the steam out of the exhaust gas, which puts more heat into the house. In the summer, the AC drains humidity out of the air, which also needs to be pumped out. -- Christopher A. Young Learn more about Jesus www.lds.org .. "Jules" wrote in message ail.com... Hmm. Ours has an intake and outlet to the outside world - but it also has a small shoebox-sized pump beside it, which collects moisture and pumps it into the waste water system for the house. I'm not sure if that pump is for extracting moisture that's in the air, or from the gas supply - but given the way it's floor mounted beside the furnace it looks like optional extra equipment, as otherwise surely it'd be built into the furnace... If it *is* optional on furnaces and the OP doesn't have it, maybe they need it, whatever its exact function is... (just idle speculation, not based on any knowledge of how furnaces work! :-) cheers Jules |
HVAC question
"John Grabowski" wrote in message ... *If the unit is the type that I am thinking of you should have two PVC pipes coming off of it. One is for fresh air and the other is exhaust. The exhaust pipe must be pitched (Sloped downwards slightly) towards the outside so that condensation will drain outside and not into the unit. Check to see if that is so. Also if your unit is not pulling air in directly from the outside it would be a good idea to bring fresh air into the room. On a typical condensing furnace, the PVC vent piping will slope slightly UPWARD toward the outside, so that the condensate in the vent will drain back thru the furnace condensate handling system. See page 14 of the installation instructions here for a typical system: http://icpindexing.mqgroup.com/docum...4001105007.pdf 8. All exhaust vent piping from the furnace to termination MUST slope upwards. A minimum of 1/4? per foot (6.4mm per 304.8 mm) of run is required to properly return condensate to the furnace drain system |
HVAC question
*If the unit is the type that I am thinking of you should have two PVC pipes coming off of it. One is for fresh air and the other is exhaust. The exhaust pipe must be pitched (Sloped downwards slightly) towards the outside so that condensation will drain outside and not into the unit. Check to see if that is so. Also if your unit is not pulling air in directly from the outside it would be a good idea to bring fresh air into the room. On a typical condensing furnace, the PVC vent piping will slope slightly UPWARD toward the outside, so that the condensate in the vent will drain back thru the furnace condensate handling system. See page 14 of the installation instructions here for a typical system: http://icpindexing.mqgroup.com/docum...4001105007.pdf 8. All exhaust vent piping from the furnace to termination MUST slope upwards. A minimum of 1/4? per foot (6.4mm per 304.8 mm) of run is required to properly return condensate to the furnace drain system *OOPS. You're right. I shouldn't respond to these things before coffee. |
HVAC question
On Oct 18, 8:54*pm, "Jim" nospam@wherever wrote:
...air basically feels clammy...bought a humidistat and the house is sitting at around 50% humidity.... we use 50% doesn't feel clammy to me, but maybe it would to you. Condensation on a triple pane window sounds unlikely at 50% too. But "sitting at" makes me wonder if the humidistat is working. Your furnace should be cycling. This early in the season it should be off longer than it is on. Can you watch your humidistat and see what happens when the furnace comes on? Does the humidity raise or lower as the furnace runs? That should tell you something about what is going on. |
HVAC question
Jim wrote:
Hello, I have a 2600 sq ft 4 level split home in Canada. It was built in 1985. This past spring we replaced our very non-effecient furnace with a Tempstar 95% effecient gas furnace. It really is wonderful as the old furnace would cause the house to feel sort of drafty and basement was always cold etc... Now I have this furnace that I love to bits BUT now since it has gotten colder outside these past two weeks, we have kept the doors and windows closed and now have a high humidity problem inside the home IE: fogged up windows (triple pane)...air basically feels clammy...bought a humidistat and the house is sitting at around 50% humidity.... we use bathroom fans in the shower, and have a fan over the stove when cooking that we use all the time...we keep lids on pots on the stove etc...We have no children and only the two of us in this home so no long lingering showers by kids or anyone else.... I don't want to have to buy a dehumidifier over this new furnace.. sort of defeats the idea of trying to be energy effecient... Thinking of trying to duct in an outside air source to feed the furnace? Thoughts? Thanks... Jim In addition to all the other good advice and questions, do you have a gas oven/range? Been cooking/baking a lot? Normally no one pays attention to the warning that the exhaust fan should be on when cooking. Besides using up oxygen, it puts LOTS of moisture in the air. |
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