Warm in January.
Cool in July.
Family-owned heating and cooling for Madison and Dane County homes since 1986.
- 4.9 from 163 Google reviews
- Carrier Factory Authorized Dealer
- 24-hour emergency service
Can't wait for morning?
Technicians on call 24 hours a day, in well-stocked vans.
What we do
Residential replacement and service are the core of it, with new construction alongside.
Heating
Furnace and boiler repair, replacement and installation. We've done furnace installs as quick as 24 hours.
Air conditioning
AC repair, replacement and installation, by NATE-certified technicians.
Replacement
A free in-home estimate and more than one option.
Repairs
Same-day when we can, 24 hours for emergencies.
Maintenance
Two checks a year for $298, plus member discounts.
New construction
Homes, condos and apartments, with your builder.
April 17, 2026
One morning, in the order the camera took it.
Two old outdoor units at 7:36 am. Two new ones by 12:53 pm. It plays on its own, or use the buttons to go at your own pace.
7:36 am
Two old outdoor units, still in place.
Photo 1 of 6
Photos from our April 2026 work gallery, shown in order. Times come from the photo file names. The last photos share one timestamp, so we say “by.” More from that month.
Annual AC maintenance and inspection in Monona. Drag to compare.
Maintenance Membership
Two visits a year, and we send the reminder.
$298a year
- One furnace check in fall or winter, one AC check in spring or summer
- 10% off service call labor for weekday repairs
- 10% off all HVAC parts, including purifiers, humidifiers and filters
- Reduced rates on after-hours emergency visits
- Priority, same-day service on repair calls
4.9 on Google from 163 reviews, as of November 4, 2026
“They had a service tech out at 8 am and when my 30 year old unit couldn't be saved they had a team out here that day to install a new unit!”
Alison Schiro · Emergency service
“Over the past few years, I've used Shackelford for emergency service for my furnace, as well as subsequent replacement of both my furnace and central AC. They have provided same-day service, including replacing my central AC within 6 hours of calling -- with the utmost courtesy and competency. I highly recommend Shackelford.”
Alexander Earl · Furnace & AC replacement
“They are absolutely the best. I was recommended here from my neighbor and I'll never go back. They were able to stop in same day to fix my furnace, the price was perfect and fair. The repairman was awesome, it felt like I had a friend over taking care of my house. Thank you!”
Christopher Weed · Furnace repair
“Shackelford H&C is and has been the only Heating and Cooling company we've used and we will continue to use. We are eager to refer people to them because of their work ethic and we trust them. They always listen to our needs, provide the best affordable options and they always stand by the products installed.”
Karen Sunshine · Planned maintenance
Family-owned
The people behind the vans.
Tom Shackelford started the company in 1986. Mike and Holly Hoffer bought it from him in 2003 and still run it. Mike is the owner, Holly runs the office, and this is the crew you'll meet.
Meet everyone
Jim
New Construction & Install Manager
John
Service Manager
Justin
Installer
Parker
Installer
Jake
Service Technician
Owen
Installer
Debbie
Scheduler
Need a quote or a repair?
In-home estimates are free. If it can't wait for morning, someone is on call around the clock.
Where we work
- Madison
- Fitchburg
- Middleton
- Waunakee
- Verona
- Sun Prairie
- Stoughton
- Belleville
- Brooklyn
- Oregon
- Cambridge
- Cottage Grove
- Monona
- McFarland
- Deerfield
- DeForest
And the rest of the Madison area and Dane County.