Air Conditioning!

[Darell_n]

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Every HVAC guy tried to upsell me a new furnace, until I got Gavin in for an estimate who told me flat out he couldn't do it, lol. I guess because the way my return ductwork runs, and the furnace is large and too close to the walls to do change anything without ripping it out.

Minisplit will be my choice.

That’s common with old units and also a lot of older houses don’t have the ducting and blower to provide enough CFM to run the a/c properly.

[sabad66]

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Can ac be installed on a dinosaur lennox made in the 70s? got a few quotes last summer and all wanted to sell me a new furnace

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No you don’t have to. I had it added to my 1980s era Lennox. Some places will highly recommend it and some might even say they won’t install an a/c on an older furnace (w&J said this to me) so you may have to shop around if you hear that.

Check out Lendrix if all the other guys aren’t willing to do it. Good guy and fair pricing when he did mine 3 years ago

Www.lendrixhvac.com

[dj_rice]

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That’s common with old units and also a lot of older houses don’t have the ducting and blower to provide enough CFM to run the a/c properly.

Interesting. Thats what I was worried about but my furnace is mid-efficiency, home built in 2000 so I should be okay?

[BerserkerCatSplat]

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Interesting. Thats what I was worried about but my furnace is mid-efficiency, home built in 2000 so I should be okay?

You'll be fine. Ours is a 2002-vintage mid-efficiency and our A/C installer (WJ) told us to keep that thing forever and stay away from high-efficiency units if we could help it.

[Darell_n]

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Interesting. Thats what I was worried about but my furnace is mid-efficiency, home built in 2000 so I should be okay?

Should be fine, if I had to guess. Mine is 1996 and I retrofit in a 4” pleated air filter to replace the 1”. This alone pretty much fixed any a/c issues I had due to low airflow. Before I had to run a shitty fibreglass 1” filter in the summer and a better pleated in the winter.

[g-m]

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You'll be fine. Ours is a 2002-vintage mid-efficiency and our A/C installer (WJ) told us to keep that thing forever and stay away from high-efficiency units if we could help it.

Why?

[suntan]

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Why?

HE units seem to be very unreliable and parts cost a fortune, even before all this supply chain BS.

[killramos]

Anyone on here have opinions on high velocity furnaces?

[ExtraSlow]

Is that like overclocking your furnace fan? Because I'm pretty sure I have that option now with my aftermarket fan motor. #coolnow

[Tik-Tok]

I had to look it up. It's kind of like a mini-split system, but instead of ungodly looking interior units on your wall, it's little 2" ducts in your ceiling, like a car vent.

Interesting.

[killramos]

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Is that like overclocking your furnace fan? Because I'm pretty sure I have that option now with my aftermarket fan motor. #coolnow

The name is a bit of a misnomer, basically it’s a forced air system that relies on a high pressure central rail with small tubing run from that with very small ducts in every room. Air exits the duct at much higher speed, leads to more air movement in the rooms and maybe more even heat?

Becuase of the pressurized central rail it’s less affected to closed vents etc. as a normal system that lacks “oompf” to move the air. The part of me that’s still an engineer found it interesting.

I had never heard of it before recently so I was curious if anyone else had.

[ExtraSlow]

Limited-Entry heating? I like it.

[BerserkerCatSplat]

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Why?

Suntan had it right, he felt that HE units are unreliable and expensive to repair. Paying to upgrade to an HE from an ME would be a money-losing prospect in the long run.

[pheoxs]

High velocity seems stupid as a retrofit but if it's a new build then I'd probably got that way. Your ducting is <half the size so it can open up a lot easier design options.

[schurchill39]

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Limited-Entry heating? I like it.

I'll run the calcs! Are we good with using 0.85 as the discharge coefficient for this first pass?

[ExtraSlow]

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I'll run the calcs! Are we good with using 0.85 as the discharge coefficient for this first pass?

god we are geeky.

[Darell_n]

I can’t see high velocity used to describe anything in HVAC as anything other than noisy AF. Size matters.

[BoS_DC2]

Hi folks, first post in awhile.

My cousin told me about this thread and mentioned that a superstar named Gavin can hook it up with Air Conditioning in YYC...

[Tik-Tok]

Gavin's not here, you have to call him like any other business.

[dj_rice]

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Hi folks, first post in awhile.

My cousin told me about this thread and mentioned that a superstar named Gavin can hook it up with Air Conditioning in YYC...

Looks like 403ep3 has Gavins contact info