Understanding the 4 Types of Furnaces: What You Need to Know

Furnaces are a necessity in Alaska, so when yours breaks down, it becomes an urgent problem, fast. Rest assured, Mountain Mechanical is a group of certified technicians that is always on call and ready to handle any of your HVAC needs, no matter which type of furnace you have. We handle furnace repairs, inspections, and full replacements to keep your home warm and safe in the harshest conditions.

The Four Types of Furnaces

Choosing the right furnace starts with understanding your options. Each type of furnace offers its own benefits, costs, and maintenance needs. Here’s a closer look at their advantages, expected lifespans, and what it takes to keep them running smoothly.

Natural Gas Furnaces

Natural gas (forced air) furnaces are a highly economical and efficient choice, often serving as one of the best furnaces for Alaska homes. These furnaces are becoming a more popular heating preference in Alaska because they offer high energy efficiency, making them cheaper in the long run.

• Life Expectancy: The life expectancy of a natural gas furnace is 15 to 20 years, depending on furnace use, maintenance checks, and proper filter use. 
• Energy Efficiency: Natural gas furnaces often range from 80% to 98% efficiency. A furnace with an energy efficiency rating of 98% will require less natural gas to heat your home than a unit with a lower rating. 
• Maintenance: Natural gas furnaces require an annual inspection, but also monthly/quarterly air filter changes.
• Cost: The upfront cost of a natural gas furnace varies based on the size & efficiency rating of the unit. Natural gas furnaces often have a higher initial purchase cost but offer a cheaper heating option over time.

Oil Furnaces

In terms of BTU, oil furnaces provide more heat than any other heating source. Oil furnaces require an on-site oil storage tank with ease of access for oil delivery.

• Life Expectancy: The life expectancy of an oil furnace is up to 25 years, depending on furnace use and maintenance checks. 
• Energy Efficiency: Oil furnaces are slightly less efficient than natural gas furnaces. This type of furnace option typically ranges between 70%-90% efficiency. 
• Maintenance: Oil furnaces require regular and preventive maintenance checks, an oil storage tank, and oil deliveries. 
• Cost: The upfront cost of an oil furnace is around 25-30% cheaper than a natural gas furnace, but it has lower efficiency and higher oil fuel prices.

Baseboard Heating Options

Placed along the base of walls, baseboard heating warms a room using units. Heating elements in electric baseboards generate heat with electricity. Hot water circulates through pipes in hydronic baseboards to create warmth. When determining the best furnace for Alaskan homes, baseboard heating is ideal for specific rooms or smaller spaces, offering localized heat.

Electric Baseboards

Electric furnaces are among the most affordable types of furnaces to purchase and install, offering long lifespans and fewer furnace repair needs.

• Life Expectancy: The life expectancy of an electric furnace is 35 years, but dependent on furnace use and maintenance checks.
• Energy Efficiency: When purchasing an electric furnace option, you can reduce utility costs by buying an energy-efficient unit with a higher Energy Star rating. This rating gives certification for energy-saving and eco-friendly products.
• Maintenance: One advantage of this type of furnace is longevity and durability. The furnace units often require fewer repairs. However, electric furnaces still require annual maintenance checks in Alaska. 
• Cost: Electric furnaces are the cheapest heating option to purchase and have installed. These units can be upwards of 50% cheaper than gas and oil furnaces. However, the cost of electricity is much higher than that of gas, which may have you considering other types of furnaces for your Alaska home.

Hydronic (Water) Baseboards

Hydronic baseboard heaters use hot water to provide consistent, energy-efficient warmth throughout the home.

• Life Expectancy: The average life expectancy of a hydronic baseboard heating system is 20 years. With proper maintenance, we can help you extend the life of your unit.
• Energy Efficiency: Hot water baseboard heaters offer high energy efficiency and provide long-lasting heat once the system is heated up. 
• Maintenance: Hydronic baseboards require less maintenance but can bring costly repairs if not maintained. We advise a yearly maintenance check of your Anchorage boiler heating system, floor pan, and radiator system. A system flush is recommended every 3 to 5 years. This will help remove any sludge or build-up that may occur within the pipes. Clogged pipes can cause cold rooms and, in some cases, cracked and leaking pipes. 
• Cost: Hydronic Baseboard installs can cost up to four times as much as electric, but they are a less expensive heating option to operate in the long run. 

Propane Heating 

Propane heating options are available if gas and oil are not readily accessible in the area. We currently do not service propane heating equipment.

Why You Should Know Your Furnace’s Age

Is Your Furnace Ready For Maintenance?

Alaska winters demand a lot from your furnace. Whether you rely on natural gas, oil, electric, or hydronic baseboards, every system has its own quirks. Some cost less to install, others last longer, but all need regular upkeep and furnace maintenance to keep the cold at bay.

Older furnaces are more likely to quit right when you need them most. Routine maintenance helps avoid surprises—and hefty repair bills. Filters clog. Parts wear out. A little proactive care can prevent major headaches later on. Need assistance from the best plumbers in Anchorage? Contact us.

Signs Your Alaska Furnace Needs Repair

Spotting furnace problems early can save you from shivering in the middle of a cold spell. Here are some signs that shouldn’t be overlooked:

• Unusual Noises: A furnace that hums along is doing its job. Knocking or rattling means something’s off—a loose motor, a broken belt, or debris caught inside.
• Inconsistent Heating: Is it hot in one room, freezing in another? Your furnace might not be circulating heat evenly. Common culprits include blocked filters, bad thermostats, or ductwork that needs attention.
• Strange Smells: If you smell burning metal, mildew, or chemicals, these odors hint at anything from an electrical issue to mold buildup. Never ignore them—especially if the smell sticks around.
• Short Cycling: Constant on-off cycles signal trouble. Overheating, airflow restrictions, or a mismatched unit size could be the problem.
• Cold Air: A furnace blowing cold air is failing its one job. Possible reasons for poor home air quality include a dead pilot light, a damaged heat exchanger, or even low fuel.
• Skyrocketing Energy Bills: Are your heating costs creeping up? It’s often a sign of a furnace working overtime. Check for clogged filters or just an aging unit that’s ready to retire.
• Pilot Light Problems: The flame should be steady and blue. Yellow or flickering flames scream ventilation issues—sometimes dangerous ones. Carbon monoxide might be involved, so don’t wait to address it.

Catching these warning signs early keeps furnace repair costs down and your home comfortable. Give your furnace the care it needs, and it’ll keep doing the hard work through the harshest winters.

Contact Mountain Mechanical for Trusted Furnace Repair Services in Anchorage, AK

Mountain Mechanical is Always on Call. Our technicians handle everything: furnace repairs, maintenance, inspections, and full replacements on the best furnaces for Alaska homes. We’ve got the experience to work with any furnace and keep your home warm, no matter how cold it gets outside. Give us a call to set up a heating service visit or talk about replacing your old unit.