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Ask me anything about HVAC heating air conditioning air quality control

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  • Jan 19th, 2019 10:08 am
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Newbie
Nov 18, 2018
3 posts
Hi again. New question.

My house has an HRV unit (Vanee) and I'm looking to get a smart thermostat. Is it possible to wire the HRV to the thermostat? Looking at Ecobee online, it allows a two-wire accessory, but I can't tell if that's right for my units control panel, which has three wires.

Thanks!
Newbie
Jul 21, 2013
81 posts
27 upvotes
Toronto
Hi

A couple of questions if you don't mind.

1. What is the difference between the Trane S9X2 and the Trane S9V2? (Price and performance)
2. Can a furnace being replaced be sold in the second-hand market (assume it is less than 5 years old and being replaced because of sizing issues)?
3. If the furnace being replaced can be sold second hand, is reasonable to assume that the specialist will be doing that? And can the consumer ask for a portion of the resale value?

Thanks
Newbie
Nov 19, 2009
2 posts
Ottawa
I was just wondering, if a HVAC technician comes in to do an annual checkup on the furnace, and just decides to put a red tag "flagged" on the furnace because the black pipework in not up to code, and must be changed within 45 days, is that wrong? I know the furnace has to be replace soon (20 yrs), I was already going to replace it but in the spring of next year. I've already had 6 HVAC companies to give me quotes last month November, and all of them did mentioned that the pipes would have to be changed during replacement/installation, but not within the 45 days. They even mentioned it could be done in the summer, as long as there's no leak (no leaks currently). This technician guy barely did the checkup on the furnace, just mentioned the pipes are not up to code and it has to be changed within 45 days. I am thinking he just wants to scare me and buy from his company. I've had an annual checkup on the furnace and not once did they mention to have the pipes replace over the past 6 years giving me a red tag. Tell me am I wrong about this? Should I get a second opinion and pay an extra $120. thanks for your help in advance
Sr. Member
Oct 9, 2011
600 posts
233 upvotes
GTA
sunshyne4ever wrote:
Dec 5th, 2018 10:40 pm
I was just wondering, if a HVAC technician comes in to do an annual checkup on the furnace, and just decides to put a red tag "flagged" on the furnace because the black pipework in not up to code, and must be changed within 45 days, is that wrong? I know the furnace has to be replace soon (20 yrs), I was already going to replace it but in the spring of next year. I've already had 6 HVAC companies to give me quotes last month November, and all of them did mentioned that the pipes would have to be changed during replacement/installation, but not within the 45 days. They even mentioned it could be done in the summer, as long as there's no leak (no leaks currently). This technician guy barely did the checkup on the furnace, just mentioned the pipes are not up to code and it has to be changed within 45 days. I am thinking he just wants to scare me and buy from his company. I've had an annual checkup on the furnace and not once did they mention to have the pipes replace over the past 6 years giving me a red tag. Tell me am I wrong about this? Should I get a second opinion and pay an extra $120. thanks for your help in advance
As long as there's no leak, there's nothing you need to do. However, he is correct. The code has been updated so when you have a new furnace installed (in the spring), they will replace the black vent pipe with a white one that conforms to the latest building code.
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Dec 11, 2005
5998 posts
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dpw198 wrote:
Dec 6th, 2018 8:31 am
As long as there's no leak, there's nothing you need to do. However, he is correct. The code has been updated so when you have a new furnace installed (in the spring), they will replace the black vent pipe with a white one that conforms to the latest building code.
Is this the new code standard pipe? https://i.stack.imgur.com/9gvR8.jpg If not can someone share an image?
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Feb 4, 2015
3932 posts
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TorontoEh wrote:
Dec 6th, 2018 10:25 am
Is this the new code standard pipe? https://i.stack.imgur.com/9gvR8.jpg If not can someone share an image?
Look for System 636 pipes.

Unless replacing hot water tank or furnace then can keep current pipes as long as no leaks or other issues.
Sr. Member
Oct 9, 2011
600 posts
233 upvotes
GTA
TorontoEh wrote:
Dec 6th, 2018 10:25 am
Is this the new code standard pipe? https://i.stack.imgur.com/9gvR8.jpg If not can someone share an image?
Tough to say, but I can tell you when I changed my 16 yr old furnace out 3 weeks ago, the installer removed a single black pvc pipe and replaced it with 2 white pipes, one to exhaust the combustion gases and one to draw in fresh air.
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Sr. Member
Sep 17, 2002
830 posts
192 upvotes
we were in the same boat - had maintenance done by reputable company in Oakville for a few years by same guy, older gentleman.

One year, we had same company but with a young guy come over - red tag b/c of exterior piping.

Called company and asked them to explain why x and y are not on same page especially if x has more experience. After a few emails and threats back and forth, we had to change the pipes.

It's all up to the technician and they are required by law to report it, so they say. When your local gas company sends you notice, you gotta fix the problem IMO.

You may want to put the $120 towards the new pipes.
sunshyne4ever wrote:
Dec 5th, 2018 10:40 pm
I was just wondering, if a HVAC technician comes in to do an annual checkup on the furnace, and just decides to put a red tag "flagged" on the furnace because the black pipework in not up to code, and must be changed within 45 days, is that wrong? I know the furnace has to be replace soon (20 yrs), I was already going to replace it but in the spring of next year. I've already had 6 HVAC companies to give me quotes last month November, and all of them did mentioned that the pipes would have to be changed during replacement/installation, but not within the 45 days. They even mentioned it could be done in the summer, as long as there's no leak (no leaks currently). This technician guy barely did the checkup on the furnace, just mentioned the pipes are not up to code and it has to be changed within 45 days. I am thinking he just wants to scare me and buy from his company. I've had an annual checkup on the furnace and not once did they mention to have the pipes replace over the past 6 years giving me a red tag. Tell me am I wrong about this? Should I get a second opinion and pay an extra $120. thanks for your help in advance
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Dec 11, 2005
5998 posts
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georvu wrote:
Dec 6th, 2018 12:15 pm
Look for System 636 pipes.

Unless replacing hot water tank or furnace then can keep current pipes as long as no leaks or other issues.
Oh I will be asking Enbridge (now reliance bought the hot water tank) to be taking it out soon so I suppose this will come up.

thanks again
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Deal Addict
Feb 4, 2015
3932 posts
1053 upvotes
Canada, Eh!!
iwells wrote:
Dec 6th, 2018 1:50 pm
we were in the same boat - had maintenance done by reputable company in Oakville for a few years by same guy, older gentleman.

One year, we had same company but with a young guy come over - red tag b/c of exterior piping.

Called company and asked them to explain why x and y are not on same page especially if x has more experience. After a few emails and threats back and forth, we had to change the pipes.

It's all up to the technician and they are required by law to report it, so they say. When your local gas company sends you notice, you gotta fix the problem IMO.

You may want to put the $120 towards the new pipes.
TorontoEh wrote:
Dec 6th, 2018 2:58 pm
Oh I will be asking Enbridge (now reliance bought the hot water tank) to be taking it out soon so I suppose this will come up.

thanks again
Unless there was an issue or changing HWT or furnace there was no reason to change pipes. It is better to have the second pipe bringing in fresh air so no harm done however would not suggest to continue with that company.

If replacing HWT then will need to update HWT pipe. They could also update furnace pipes but since replacing soon suggest to wait as new furnace most likely different in terms of size and pipe placement.

We had HWT pipe replaced and guy offered to update furnace pipes but we declined. Good thing as replaced furnace soon after and it was different then original furnace so pipes would not line up.
Deal Fanatic
User avatar
Dec 11, 2005
5998 posts
424 upvotes
TO
georvu wrote:
Dec 6th, 2018 3:25 pm
Unless there was an issue or changing HWT or furnace there was no reason to change pipes. It is better to have the second pipe bringing in fresh air so no harm done however would not suggest to continue with that company.

If replacing HWT then will need to update HWT pipe. They could also update furnace pipes but since replacing soon suggest to wait as new furnace most likely different in terms of size and pipe placement.

We had HWT pipe replaced and guy offered to update furnace pipes but we declined. Good thing as replaced furnace soon after and it was different then original furnace so pipes would not line up.
Good advice,thanks.
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Newbie
Jan 16, 2017
1 posts
Question about replacing furnace blower fan.

I'm in a 2014 built house, 100,000 btu furnace, 3800sq house. The furnace blower that I have right now is a single stage (its either on at 100% power or off). Theres nothing wrong with the blower, but I'm thinking of replacing it with a variable speed blower that can power on at 50% output and deliver furnace heat for a longer period of time without constantly cycling turning on/off.

A few questions:
1) my house is pretty big, 3800sq plus unfinished basement, if the variable speed motor is only on at 50%, will it even have the power to deliver heat to all my rooms?
2) the variable speed motor will be on for longer than a single speed motor, but when the variable speed motor is on, i'll be consuming gas (smaller amount but over a longer period of time). Will I be theoretically consuming more or less gas?
3) would there be any implications to my air conditioner or bypass humidifier?
4) what is a reasonable amount an HVAC company would charge to replace my single speed motor to a variable speed one?

Thanks!
Newbie
Mar 1, 2014
40 posts
19 upvotes
Toronto
Is it possible to get an independent consultant to come to my home and help me understand why we have cold rooms, and what we should do about them?

Anyone I've spoken to so far is just a furnace or air con technician so I'm not convinced they are truly independent.

Thanks!
Member
Jan 19, 2013
288 posts
132 upvotes
613
TorontoEh wrote:
Dec 6th, 2018 10:25 am
Is this the new code standard pipe? https://i.stack.imgur.com/9gvR8.jpg If not can someone share an image?
That’s not ulc-s636 pipe
Probably just drain or water pvc
Only after mid-2007 the standard for venting need to be certified to ulc-s636.
Anything before that was anything goes aslong as proper glue/solvents being used/installed correctly and had some sort of Canadian certification as far as I know.
Member
Jan 19, 2013
288 posts
132 upvotes
613
zerohope wrote:
Dec 6th, 2018 7:56 pm
Question about replacing furnace blower fan.

I'm in a 2014 built house, 100,000 btu furnace, 3800sq house. The furnace blower that I have right now is a single stage (its either on at 100% power or off). Theres nothing wrong with the blower, but I'm thinking of replacing it with a variable speed blower that can power on at 50% output and deliver furnace heat for a longer period of time without constantly cycling turning on/off.

A few questions:
1) my house is pretty big, 3800sq plus unfinished basement, if the variable speed motor is only on at 50%, will it even have the power to deliver heat to all my rooms?
Likely, probably need to adjust dampers
2) the variable speed motor will be on for longer than a single speed motor, but when the variable speed motor is on, i'll be consuming gas (smaller amount but over a longer period of time). Will I be theoretically consuming more or less gas?
pretty much same gas
3) would there be any implications to my air conditioner or bypass humidifier?
no as long as it’s set up properly
4) what is a reasonable amount an HVAC company would charge to replace my single speed motor to a variable speed one?
youre not able to retro fit variable speed, you can retrofit a ecm fan motor though.
Thanks!
I think you are a little bit confused. You can’t set the fan speed 50% when you’re gas is still set to 100%.
Furnace will overheat. You need a two stage gas valve to do that(not possible to do without replacing furnace)
Main advantage of variable speed/ecm motor is lower continuous fan speed to even out temperatures in home and dc technology for money savings.
Aftermarket ecm motors usually have 4 or five speed. Your current motor likely has 3 or 4 fan speeds that can be adjusted to better suit your home.

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