Furnaces in St. Paul, MN
Furnace installation, repair and maintenance for Minnesota homes.
What customers say
“On a cold winter night our furnace suddenly stopped working. We called Krinkies and were immediately connected with their on‑call technician, Andrew. He arrived within the half hour, just as promised, and quickly began troubleshooting…” Read the full review on Google
“Andy & Joe did a great job installing our new air conditioner & furnace. They were prompt, friendly, professional & informative. We’ve always been impressed with Krinkies customer service!”
Guides for homeowners
Furnace AFUE Explained: 80% vs. 90%+ for Minnesota Homes
AFUE tells you how much of the gas a furnace burns becomes heat in your home. Here is how 80% and 90%+ furnaces differ, what that means for installation, and where the federal efficiency rules stand today.
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Why Is My Furnace Blowing Cold Air? Causes and Safe Checks
A furnace that blows cold air usually has a simple setting problem, an airflow problem, or a failed ignition part. Here is how to tell which one you have and what you can safely check yourself.
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Furnace Repair or Replacement? How to Decide
When a furnace breaks down, the right answer depends on its age, its condition, the type of repair and how well it heats your home. This guide walks through each factor so you can make the call with confidence.
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Furnace Sizing: Why a Manual J Load Calculation Matters
The right furnace size depends on how much heat your home loses on a cold day, not on square footage or the size of your old furnace. A Manual J load calculation measures that heat loss.
Read the guide →How a gas furnace heats your home
A gas furnace burns natural gas to warm a metal heat exchanger. A blower pushes house air across it and out through your ducts. Exhaust gases leave through a flue or vent pipe to the outdoors.
Furnace efficiency is measured as AFUE, which shows how much of the fuel becomes heat. In the northern U.S., ENERGY STAR certified gas furnaces are up to 18 percent more efficient than baseline models. They also use higher efficiency blower motors. ENERGY STAR notes they cost more up front, but lower energy bills make up the difference over time.
Replacing a furnace
ENERGY STAR suggests a professional evaluation of heating equipment once it is more than 10 years old. The same page says sealing major air leaks and fixing ducts may be the real fix. It suggests starting with ducts in an attic, crawlspace, unheated basement or garage. It also warns that improper installation can cut efficiency by up to 30 percent.
If Xcel Energy supplies your gas, Xcel Energy’s Minnesota rebate summary lists furnace rebates for existing homes of $200 at 95% AFUE, $300 at 96% and $400 at 97%. If another utility serves your home, check its programs.
The application must be postmarked by September 30 of the year after installation. Keep your dated invoice showing the manufacturer, model and serial number. A proposal or estimate does not count. Our furnace replacement and installation page is a good place to start.
Furnace safety and carbon monoxide
A worn or poorly maintained furnace can release carbon monoxide into your home. A flue that is blocked, disconnected or the wrong size makes the risk worse. The EPA recommends that a trained professional inspect, clean and tune your heating system each heating season, including flues and chimneys.
The CPSC recommends CO alarms on every level of your home and outside sleeping areas. It also suggests interconnected CO alarms, so when one sounds, they all sound.
Symptoms of CO poisoning include headache, dizziness, nausea and confusion. If you suspect CO poisoning, get outside to fresh air and then call 911. If you smell gas near the furnace, leave the house and call 911 and your gas utility from outside.
Simple care between visits
Check your furnace filter monthly in winter and change it at least every 3 months. A dirty filter restricts airflow and makes the furnace work harder. Book a fall furnace tune-up before the first cold snap. If the furnace stops, our furnace repair technicians are on call 24/7.
Need service now?
Technicians are on call 24 hours. Book online or call us.