St. Paul, MN Air Conditioning & Heating
Northern One Hour Heating & Air Conditioning® provides fast, dependable HVAC service across St. Paul. We repair, install, and maintain all major heating and cooling systems — and we back every job with our on-time guarantee and satisfaction promise.
SCHEDULE YOUR SERVICE
Easily set up an appointment with one of our professionals online!
Comprehensive AC & Heating Repair, Installation, Maintenance
In St. Paul, where winters dip well below zero and summers bring sticky humidity, your heating, air conditioning, and indoor air quality system isn’t a luxury — it’s a lifeline. That’s why Northern One Hour Heating & Air Conditioning® provides comprehensive heating, cooling, and indoor air quality services designed for Minnesota homes. From emergency furnace repairs to new AC installations and seasonal tune-ups, our certified technicians deliver solutions that keep your home safe, efficient, and comfortable year-round.
Why St. Paul Homeowners Trust Northern One Hour®
When it comes to heating and cooling, St. Paul families need more than a quick fix — they need a partner they can depend on year-round. That’s why so many homeowners turn to Northern One Hour Heating & Air Conditioning®.
- Locally owned and operated — technicians who understand the realities of Minnesota winters and humid summers.
- Always On Time… Or You Don’t Pay a Dime!® — your schedule matters, and we back our word with action.
- Certified HVAC technicians — trained to repair, install, and maintain all makes and models.
- Clear, upfront pricing — no hidden fees or last-minute surprises.
- Clean, respectful service — shoe covers, tidy workspaces, and technicians who treat your home like their own.
- 100% Satisfaction Guarantee — backed for up to two years on parts, labor, and craftsmanship.
With Northern One Hour®, you get the professionalism of a national brand with the accountability of a local team — trusted by St. Paul families for decades.
Call (763) 319-0872 or schedule your service online now.
Full-Service AC & Heating Solutions We Provide in St. Paul, MN
AC Repairs
Fast diagnostics and repairs for all makes and models. We show up prepared and fix problems the right way, the first time.
Heating Repair
We provide fast, reliable heating repair for furnaces, heat pumps, and boilers across Minneapolis and St. Paul. If your system isn’t keeping up, we’ll get it fixed—quickly, professionally, and with no surprises.
AC installation
Need a new system? We’ll guide you through the process and install a setup tailored to your home, budget, and comfort goals.
Heating System Replacements
We provide expert heating system replacements for homes across Minneapolis and St. Paul, installing high-efficiency furnaces, boilers, and heat pumps built to handle Minnesota winters. From sizing to final install, we make the upgrade seamless, backed by honest pricing and trusted local service.
AC Maintenance
Routine service that extends your system’s life, improves performance, and helps prevent mid-season breakdowns.
Thermostats
Upgrade to a smart thermostat for precise temperature control and energy savings. Easily adjust settings from your phone and let your system learn your habits for peak efficiency and comfort.
Emergency Heating & Cooling Repairs
HVAC breakdowns don’t wait for business hours. That’s why we’re available 24/7 for urgent calls in St. Paul. Whether it’s a furnace that won’t start, an air conditioner blowing warm air, or a boiler leaking in the basement, our technicians arrive prepared to diagnose and repair quickly.
Furnaces & Boilers: Common in older St. Paul homes, these systems need specialized care. Our team knows how to troubleshoot ignition problems, leaks, and uneven heating.
Air Conditioners: Minnesota humidity can overwhelm a failing system. We restore cooling to keep your home comfortable and safe.
Frozen or Burst Pipes: When a heating failure causes a bigger problem, we coordinate with plumbing to prevent costly damage.
We know what a St. Paul winter or summer can throw at your home — and we respond with urgency so you don’t have to wait in unsafe or uncomfortable conditions.
Call (763) 319-0872 or schedule your emergency service online now.
AC Services for Hot, Humid St. Paul Summers
St. Paul summers bring heavy humidity that makes reliable air conditioning a must. We provide complete AC services to keep your home cool and efficient.
AC Repair: From refrigerant leaks to blower motor failures, we restore cooling fast. Our technicians arrive in fully stocked trucks so most issues can be fixed on the first visit.
AC Installation & Replacement: We size and install new systems designed for long-term comfort and lower energy bills. Whether you’re replacing an outdated unit or upgrading to a high-efficiency system, we’ll help you choose the right fit for your home and budget.
Ductless Mini-Splits: Perfect for older St. Paul homes without ductwork or for additions where central AC can’t reach. Mini-splits provide zoned comfort while saving on energy costs.
AC Maintenance & Tune-Ups: Routine maintenance keeps your system running efficiently, helps prevent midsummer breakdowns, and extends the lifespan of your equipment.
We understand how Minnesota’s humidity affects more than just comfort — it impacts your home’s energy use and even your indoor air quality. That’s why we provide cooling solutions tailored to St. Paul’s climate, keeping your home livable and efficient even in the hottest weeks of July.
Heating Services
Minnesota winters push heating systems to their limits. In St. Paul, where many homes still rely on older furnaces or boilers, a dependable HVAC partner is essential.
Furnace Repair & Replacement: From ignition failures to full system changeouts, we deliver solutions designed for reliability and efficiency. Our technicians ensure your furnace is properly sized and installed for St. Paul’s freezing winters.
Boiler Expertise: Many St. Paul neighborhoods still rely on boilers. Our team is trained to service and upgrade these systems, preserving the character of your home while improving safety and performance.
Heat Pump Options: For homeowners looking for efficient year-round comfort, we install and service heat pumps that work even in Minnesota’s harsh climate. These systems provide heating in winter and cooling in summer with one energy-efficient unit.
Whether you live in a historic home near Summit Avenue or a duplex in Frogtown, we adapt modern heating solutions to fit the quirks of St. Paul housing.
Seasonal Maintenance to Prevent Breakdowns
The best way to avoid costly emergencies is with preventative care. Our maintenance services prepare your HVAC system for the dramatic swings between St. Paul’s winters and summers.
Furnace Tune-Ups: Before the first freeze, we perform complete inspections and adjustments to ensure your furnace runs reliably all winter long.
AC Tune-Ups: Ahead of cooling season, we test and clean critical components so your AC is ready for heavy use in July humidity.
System Efficiency Checks: We measure performance, test airflow, and calibrate controls to keep your system operating at peak efficiency, lowering energy bills while protecting your investment.
Regular maintenance not only prevents breakdowns but also extends the life of your equipment, so you get more out of your system for years to come.
Indoor Air Quality Solutions
Cold winters mean sealed windows for months, while humid summers increase allergens and moisture. That’s why indoor air quality is essential for St. Paul homes.
Air Purifiers: We install systems that reduce allergens, dust, and airborne particles, helping your family breathe cleaner air.
Humidifiers & Dehumidifiers: In winter, balanced humidity prevents dry air that causes cracked wood and irritated sinuses. In summer, dehumidifiers control excess moisture and protect against mold growth.
Duct Cleaning & Sealing: Older homes often have ductwork that’s inefficient or leaking. Cleaning and sealing improves airflow, increases efficiency, and enhances overall comfort.
By pairing the right indoor air quality solutions with your HVAC system, we help St. Paul families enjoy healthier, more comfortable homes year-round.
Call (763) 319-0872 or schedule your St. Paul home service online now.
HVAC Challenges in St. Paul Homes
St. Paul homeowners face issues that go beyond standard heating and cooling needs. The city’s housing mix, weather extremes, and water quality all play a role in how HVAC systems perform. At Northern One Hour Heating & Air Conditioning®, we tailor our solutions to these realities.
Older Housing Stock
From Summit Hill to Frogtown, many St. Paul homes were built decades ago with outdated ductwork, narrow basements, or boilers still in service. We specialize in retrofits that bring modern efficiency to older layouts without disrupting your home’s character.
Extreme Minnesota Climate
Few places demand more from heating and cooling systems than St. Paul. Subzero winters push furnaces and boilers to their limits, while hot, humid summers make AC units work overtime. Our systems are designed and sized for these extremes, so you stay comfortable year-round.
Unique Comfort Concerns
Closed windows all winter and heavy humidity in summer affect indoor air quality as much as temperature. We install purifiers, humidifiers, and dehumidifiers that make St. Paul homes healthier as well as more comfortable.
Local Expertise You Can Trust
We’re not just HVAC experts — we’re your neighbors. From retrofitting ductless AC in Como Park bungalows to replacing boilers in Mac-Groveland duplexes, our technicians know the quirks of St. Paul homes and the climate that shapes them. That’s why families across the city trust Northern One Hour® for reliable comfort year after year.
Frequently Asked Questions
Do you provide emergency HVAC service at night or on weekends?
Yes. We’re available 24/7 for heating and cooling emergencies anywhere in St. Paul.
Do you work on boilers?
Absolutely. Many St. Paul homes still rely on boilers, and our technicians specialize in their repair and replacement.
What brands do you service?
We work on all major HVAC brands and models, no matter the age of your system.
Can you help me decide whether to repair or replace?
Yes. We evaluate your system, explain the options, and give honest recommendations based on your home and budget.
Do you offer maintenance plans?
We provide annual maintenance options to keep your furnace and AC running reliably through Minnesota’s toughest weather.
From older homes in Minneapolis to new builds across St. Paul suburbs, we know what it takes to deliver comfort that lasts.