Return to the Heating & Air Conditioning Forum | Post a Follow-Up

which AC unit for second floor of a bungalow?

Posted by oppsie (My Page) on
Fri, Dec 7, 12 at 18:20

Hi all,

Doing a gut reno of my second floor. The house is a bungalow so it gets nice and toasty up there in the summer. General footprint is roughly 60'x13' consisting of two bedrooms and two full baths. GC/HVAC determined that our current system isn't enough to support full-time, comfortable living up there -- at the moment we live strictly on the first floor, and as a 1946 house I don't think it was ever optimized for comfort upstairs. The HVAC guys have been here all week running all new ductwork and installing the furnace (Lennox SLP98). Also added R-21/R-13/R-38 wherever we could.

We need to choose an AC unit and I'm questioning what the HVAC guys have spec'd out. They're planning to install a Lennox 13ACX-024-230 and maintain that this is adequate for the space. While I believe that, we plan to be in this house for the next 20 years at least -- would it make more sense economically to move up to one of the following?

XC13-024-230 $350.00 additional
XC14-024-230 $625.00 additional (quietest according to HVAC guys)
XC16-024-230 $1,200.00 additional. 2-stage. Seems like overkill.

Utility rebates in my region are $150 for 15 SEER, 250 for 16 SEER.

Follow-Up Postings:

RE: which AC unit for second floor of a bungalow?

I would move up to the XC13 condenser model with best matching evap coil.

Just curious, what size is old condenser?

If second floor will be used sporadically, I see no reason to go higher than a 13 SEER. However, it is important that you are sized correctly. Has dealer/ GC performed a load calc and provided a copy in writing for your review? If not, insist on it.

What s your location and what size furnace is being istalled?

Post back.


RE: which AC unit for second floor of a bungalow?

Based on your bungalow location and building formation only its possible to say the correct location for AC unit.

RE: which AC unit for second floor of a bungalow?

@tigerdunes Checking what size the existing unit is (meaning, trying to find paperwork...can't quite get to the unit to look). Same for the new 2nd floor furnace.

The second floor will be where all three occupants of the house sleep at night, so cooling is important. I'm basically already decided on going with the XC13 (which should be eligible for the utility rebate as it's "up to 15.5 SEER"... right?) so thank you for confirming.

I don't think they've done a manual J yet. I assumed they couldn't since they were tearing out the existing ductwork and replacing, and there are no solid walls, only framing. I've asked my GC to provide one, though.

We're in Michigan.

BTW they're putting a manual bypass humidifier, Lennox Healthy Climate model HWCB3-12, on the furnace. Tstat will be iComfort.

This post was edited by oppsie on Tue, Dec 11, 12 at 15:00

RE: which AC unit for second floor of a bungalow?

...and DH checked the new furnace and says it says:

Slp98uh o70xv36b -04

Existing furnace:


This post was edited by oppsie on Tue, Dec 11, 12 at 15:12

 o Post a Follow-Up

Please Note: Only registered members are able to post messages to this forum.

    If you are a member, please log in.

    If you aren't yet a member, join now!

Return to the Heating & Air Conditioning Forum

Information about Posting

  • You must be logged in to post a message. Once you are logged in, a posting window will appear at the bottom of the messages. If you are not a member, please register for an account.
  • Please review our Rules of Play before posting.
  • Posting is a two-step process. Once you have composed your message, you will be taken to the preview page. You will then have a chance to review your post, make changes and upload photos.
  • After posting your message, you may need to refresh the forum page in order to see it.
  • Before posting copyrighted material, please read about Copyright and Fair Use.
  • We have a strict no-advertising policy!
  • If you would like to practice posting or uploading photos, please visit our Test forum.
  • If you need assistance, please Contact Us and we will be happy to help.

Learn more about in-text links on this page here