Our customers say it best.

Prompt Heating & Air Conditioning provides high-quality, efficient scheduled service and emergency repair for all Lennox HVAC products, including furnaces and AC units. We have the experience necessary to handle issues on any Lennox AC or furnace model and make sure it runs properly. We give 30-minute appointment windows, firm price quotes and a 2-year workmanship warranty for peace of mind.

Lennox furnaces are known for their efficient and quiet operation. SilentComfort™ technology from Lennox minimizes motor and fan noise for more comfortable winter days and nights. Some models offer an AFUE rating of nearly 98%, which is as good as it gets for high-efficiency premium furnaces.
We provide diagnostic and repair services for any type of furnace issue, from blower motor problems to an error light code. When your Lennox furnace needs maintenance or repair of any kind, it’s best to get it fixed by a licensed HVAC professional to keep the manufacturer’s warranty valid. Contact us today.
Lennox offers both oil and gas furnaces at a range of different price points. We provide affordable services for all models, including the Elite Series, Merit Series and Dave Lennox Signature Collection:
Don’t see your model? We also service discontinued models. Give us a call to schedule your repair and learn more about our furnace repair services.
Prompt Heating & Air Conditioning is the top option for professional furnace installations. Our highly trained technicians get your furnace operating at ideal efficiency to extend comfort and minimize energy consumption. According to the Lennox website, their furnaces have an average lifespan of around 15 to 20 years. Our hassle-free service and up-front pricing save you time and money. Contact us today to get started!
Prompt Heating & Air Conditioning will help you get the maximum efficient service life out of your Lennox gas furnace. Maintenance can also reduce the risk of breakdowns and help control energy bills in winter.
We offer seasonal tune-ups, regular furnace maintenance and discounts on products and services. Regular maintenance from Prompt Heating & Air Conditioning helps optimize energy usage and prevent costly repairs, keeping your home warm and your pockets full through the winter.

Lennox air conditioners are a great choice when efficiency and streamlined design are priorities. Lennox air conditioners run quietly and reliably, and the top AC models have a SEER rating up to 26 (outstanding).
We provide emergency and non-emergency Lennox AC repair for all models. If your unit is running loud, shutting off, or failing to keep your indoor temperature constant, give us a call. We’ll get to the bottom of things, explain the problem in plain English and give you fair and transparent pricing for repairs.
Trust Prompt Heating & Air Conditioning for your Lennox AC repair services. We handle everything from regular tune-ups and maintenance to emergency repairs and replacements. Our team is equipped to work on any Lennox AC model you have. Stay cool and contact us today!
Lennox offers three series of AC units: the Elite Series, Merit Series and Dave Lennox Signature Collection. No matter the model, our team can handle the maintenance necessary for proper operation:
Call us to handle problems with thermostat failures, refrigerant leaks, electrical problems, fan motors, compressors or anything else. We’ll get to the bottom of it and explain the issue in plain language. Learn more about air conditioner repair or AC recharge services.
Correctly installing your Lennox cooling system is crucial for longevity and optimal function. Prompt Heating & Air Conditioning delivers expert Lennox installation services to set up your new unit flawlessly so your Lennox can last for the 10-12 year lifespan or even beyond. Reach out to Prompt Heating & Air Conditioning for smooth and efficient Lennox system installation without the stress.
Regular preventative maintenance helps you get the most out of your Lennox AC unit. Call us for an AC tune-up before summer starts to keep your unit running reliably through the hottest weeks. Members of our service plan get semi-annual tune-ups and discounts on products & services.

Lennox makes a modest range of boilers including gas-fired steam boilers and gas-fired water boilers. At the high end their GWM-IE boiler features innovative design, an AFUE rating of 95 and a 15-year limited warranty on the heat exchanger. Their most wallet-friendly model, the GSB8-E features a respectable AFUE rating of 82.7, electronic ignition and thick insulation for minimal heat loss.
If you have a Lennox boiler installed, rely on Prompt Heating & Air Conditioning for warrantied boiler services including boiler repair and maintenance.
Lennox offers several different thermostats and zoning systems for their HVAC equipment. Some Lennox thermostats feature a color touchscreen, remote operation and integration with Alexa for voice control. Get the most function and efficiency out of your Lennox furnace or air conditioner with Lennox temperature control and zoning solutions.
Prompt Heating & Air Conditioning can help you with:
From our Milwaukee headquarters, Prompt Heating & Air Conditioning offers reliable HVAC repair to customers throughout the greater Milwaukee region, including Milwaukee, Waukesha and Washington counties. You’ll always get a firm price quote before work starts, friendly service and 30-minute appointment windows. We proudly offer product and service discounts to members of the U.S. military, police and fire departments.
Prompt Heating & Air Conditioning offers discounted rates on HVAC equipment & service for:
5% off new equipment purchases
15% off new equipment purchases
With Prompt Heating & Air Conditioning, you'll always find friendly service, warrantied workmanship & up-front pricing.
Learn More about our HVAC Service Plan, or contact us today for Prompt HVAC services.
Located in Waukesha, Prompt Heating and Air Conditioning serves residents throughout Southeast Wisconsin including West Allis, Wauwatosa, Brookfield, Elm Grove, Greenfield, Franklin, Hales Corners, St. Francis, Cudahy, Bay View, Oak Creek, Menomonee Falls, Shorewood, Glendale, Whitefish Bay, Delafield, Pewaukee, Butler, Sussex, Lannon, Brown Deer, Richfield, Hubertus, Slinger, Hartford, Hartland, New Berlin, Milwaukee, West Bend, Mequon, Grafton, Nashotah, Muskego, Germantown & the surrounding communities.
Someone from our team will contact you.