J&J Mechanical Inc.

J&J Mechanical Inc. Proudly serving Dane, Green and Rock counties, J&J Mechanical delivers dependable, high quality residential and commercial HVAC services you can trust.

Whether a fast repair, full system installation, or routine maintenance, our team is here for you.

In-floor heat for two separate homes, both using combi boilers.Owner Jim Jaeggi in his element!
04/09/2026

In-floor heat for two separate homes, both using combi boilers.

Owner Jim Jaeggi in his element!

03/26/2026

👏A huge THANK YOU to J&J Mechanical Inc. for being a Grand Slam Sponsor for the 2026 Season!

⚾️We appreciate you stepping up and supporting Monroe Aces. Your generosity helps make this season possible for our players and coaches.

🙌 Please support this wonderful local business and thank them for supporting our kids and local baseball!

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❤️We are truly grateful to the sponsors that support our community and our athletes!

Sheet metal prep for a custom home 👏
03/22/2026

Sheet metal prep for a custom home 👏

03/03/2026
Commercial kitchen mechanical shaft.Included in the shaft is a roof top supply and return air duct, DOAS (Dedicated Outd...
02/20/2026

Commercial kitchen mechanical shaft.

Included in the shaft is a roof top supply and return air duct, DOAS (Dedicated Outdoor Air System), supply duct, and a CaptiveAire grease duct system.

02/18/2026
02/16/2026

Custom exhaust venting. Sound on!

Custom exhaust venting.
02/16/2026

Custom exhaust venting.

In-floor tubing as far as the eye can see. Another one ready for concrete! 🤘
02/14/2026

In-floor tubing as far as the eye can see. Another one ready for concrete! 🤘

Turning a three-season room into a four-season room with some warm board hydronic flooring.
02/13/2026

Turning a three-season room into a four-season room with some warm board hydronic flooring.

A/C condenser roof stand prep!
02/09/2026

A/C condenser roof stand prep!

Mid week furnace change out…..
02/06/2026

Mid week furnace change out…..

Address

3369 8th 1/2 Street
Monroe, WI
53566

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