How often should I get maintenance on my furnace or AC?
HVAC maintenance should be done annually; and this goes for almost all HVAC equipment! Manufacturers require annual maintenance to keep your warranty valid.
Annual HVAC maintenance in Milwaukee, WI, and surrounding areas with Interstate also provides an opportunity to inspect your system before heavy use, like checking your air conditioner before summer or furnace before winter, to minimize risk of a breakdown.
How often should I change my HVAC filters?
Replace 1-inch filters every month and no later than every 3 months. Replace 4-inch filters every 3 to 6 months and no later than once a year.
Interstate has worry-free Maintenance Agreements that encompasses filter changes to minimize the work you need to do to care for your HVAC system.
How do I get notifications off of my thermostat?
Notifications on your thermostat alert when there are issues going on with your furnace or air conditioning. Before clearing these, be sure they are addressed by an Interstate HVAC professional in Sussex. They also can be reminders that run on a timer, like reminders of when to change your air filter.
The process to reset these reminders may vary by thermostat. You can usually clear them in the settings—or simply ask one of our HVAC techs to clear the notification after they’ve resolved the issue it was alerting to.
There is a light on my AprilAire control—what does this mean?
The light on your AprilAire humidifier is likely a reminder to replace your water panel. This indicator is activated based on runtime, usually occurring only annually. However, some homes in Milwaukee, Sussex, Waukesha, and surrounding Southern Wisconsin areas may need to have the panel changed more than once per year.
Once replaced, reset the light by turning the dial past 7, holding it for 10 seconds, then returning it to your original setting.
Do you sell furnace and AC filters?
Yes, we sell HVAC filters! Interstate can provide when maintenance is performed, either as part of your Maintenance Agreement or as a stand-alone add-on to your service visit—just let us know your filter size before your appointment.
You can also purchase furnace or AC filters directly from us at our counter in Sussex, WI!
What should I set my thermostat to?
We recommend running the fan to the “on” setting to keep air flowing and improve indoor air quality in your home.
Most Waukesha,WI, and surrounding area homeowners prefer a heating temperature between 68 and 72 degrees and cooling temperature between 70 and 74 degrees.
What should I set my humidifier setting to?
We recommend as much humidity as possible—until you notice condensation on the windows. Then, dial it back slightly—that’s your ideal setting.
If a cold snap is forecasted in Southeastern Wisconsin, lower the humidity setting a day or two beforehand to prevent moisture buildup. Running bathroom fans or cooktop vents can also reduce humidity quickly.
Do you have any indoor air quality (IAQ) products that help with allergies?
Yes, we have several IAQ products and IAQ services available to help reduce allergy issues and improve your Southern Wisconsin home’s air quality, from air purifiers to air duct repair that stops allergens from leaking into your home.
We recommend filling out our IAQ Questionnaire for personalized recommendations or you can browse IAQ products online.
How do I know if my indoor air quality is bad?
Listen to your body—signs like dry skin, sinus issues, or strange odors may indicate poor indoor air quality in your Southern Wisconsin home.
Take our IAQ Questionnaire to get started on improving your comfort and air health.
Do you provide heating and cooling services for new construction?
Yes, Interstate has provided services for high-end custom homes in Milwaukee, Sussex, Waukesha, and surrounding areas since we started in the industry!
Our expertise includes in-floor heating, snow melts, wine chillers, heat pumps, copper gutters, flashings, metal roofs, and custom decorative chimney tops!
Do you provide your services for remodels?
Yes—we’ve served in Milwaukee, Sussex, Waukesha, and nearby communities with remodeling HVAC services for over 60 years.
We can help you upgrade to in-floor heat, metal roofing, or a new heating and cooling system or if you wish to add snow melt, a wine chiller, or even custom decorative chimney tops—we've got you covered!
What do you recommend for adding heating and cooling to an addition?
Every property addition or remodel in Southern Wisconsin is unique.
Common solutions for additions in Milwaukee and surrounding areas are ductless mini splits, adding to your existing HVAC equipment, or installing a new, larger system tailored to your remodeled property.
Do you do custom metalwork?
Yes! We offer custom metalwork services in Sussex, Waukesha, and surrounding areas—from garden box inserts to custom decorative chimney tops, flashings, and metal roofing.
Have a project in mind? Give us a call to get started!
Where are you located?
Our address is N53 W24950 S. Corporate Cir., Sussex, WI 53089.
We are the first building in the industrial park near Lisbon and Highway 164. We are across from the Kwik Trip on Highway 164. Proudly serving Milwaukee, Sussex, Waukesha, and surrounding areas of Southern Wisconsin!