Question 1

What AFUE rating should I look for in a furnace?

Accepted Answer

For most Ottawa homeowners, you should look for a furnace with an AFUE (Annual Fuel Utilization Efficiency) rating of 96% or higher. This is considered "high-efficiency" and represents the best value for our climate over the long term.

Understanding AFUE ratings is straightforward: the number tells you what percentage of fuel is converted to heat. A 96% AFUE furnace converts 96 cents of every dollar of gas into usable heat, while only 4 cents escapes as exhaust. By contrast, an older 80% furnac

Question 2

Is it worth converting electric baseboard to a furnace?

Accepted Answer

Converting from electric baseboard to a furnace is often worth it in Ottawa's climate, especially with rising electricity costs and the comfort benefits of forced air heating. However, the decision depends on your home's layout, budget, and long-term plans.

The main advantages of converting include significantly lower operating costs. Electric baseboard heating is one of the most expensive ways to heat a home in Ontario, with electricity rates around 11-17 cents per kWh. A high-efficiency natur

Question 3

Do I need a high efficiency furnace in Ottawa?

Accepted Answer

You don't legally need a high-efficiency furnace in Ottawa, but it's highly recommended due to our harsh winters and rising energy costs. High-efficiency furnaces (90%+ AFUE rating) can significantly reduce your heating bills and provide more consistent comfort during Ottawa's long heating season.

High-efficiency furnaces make excellent financial sense in Ottawa's climate. With our heating season running roughly 7-8 months per year, the energy savings add up quickly. A high-efficiency unit (96%

Question 4

Why does my furnace run for only a few minutes then stop?

Accepted Answer

Your furnace running briefly then stopping is typically caused by overheating, which triggers the safety limit switch to shut down the system. This is a protective mechanism to prevent damage or dangerous conditions.

The most common culprit is a dirty air filter that's restricting airflow. When your furnace can't pull enough air across the heat exchanger, it overheats quickly and shuts down. Check your filter first - if it's clogged with dust and debris, replace it immediately. A severely dirty

Question 5

Can I install a furnace in my attic?

Accepted Answer

Installing a furnace in an attic is technically possible but comes with significant challenges and code requirements that make it less common in Ottawa's climate. Most residential furnaces in Ottawa are installed in basements, utility rooms, or dedicated mechanical rooms for good reasons.

Attic furnace installations face several major hurdles. First, Ontario's extreme winter temperatures can cause serious problems - frozen condensate lines are almost guaranteed when temperatures drop below -20°

Question 6

Do I need a new chimney liner with a high-efficiency furnace?

Accepted Answer

Yes, you typically need a new chimney liner when upgrading to a high-efficiency furnace. High-efficiency furnaces (90%+ AFUE) produce cooler, more acidic exhaust that can damage existing clay or metal liners not designed for condensing appliances.

High-efficiency furnaces create condensation as part of their operation, which makes the exhaust more acidic than traditional furnaces. This acidic moisture can deteriorate clay tile liners and cause corrosion in metal chimneys. Additionally, the cool

Question 7

What type of furnace is best for Ottawa winters?

Accepted Answer

For Ottawa's harsh winters, a high-efficiency gas furnace with 90%+ AFUE rating is your best choice. These furnaces are specifically designed to handle our extreme cold while keeping heating costs manageable during our long heating season.

High-efficiency condensing furnaces (96-98% AFUE) are ideal for Ottawa because they extract maximum heat from every dollar of natural gas. With our heating season running from October through April, and temperatures regularly dropping below -20°C, the extra e

Question 8

Why is there white residue around my furnace vent?

Accepted Answer

White residue around your furnace vent is typically caused by condensation from high-efficiency furnaces mixing with combustion byproducts, creating mineral deposits and mild corrosion. This is most common with condensing furnaces (90%+ efficiency) that produce acidic condensate as part of their normal operation.

High-efficiency furnaces produce water vapor as a combustion byproduct, which condenses inside the heat exchanger and exits through a condensate drain. However, some moisture can escap

Question 9

Can I move my furnace to a different room?

Accepted Answer

Yes, you can move your furnace to a different room, but it's a complex project that requires professional planning and TSSA permits. This involves relocating gas lines, ductwork, venting, and electrical connections - work that must be done by licensed G2/G3 gas technicians in Ontario.

The complexity depends on how far you're moving the furnace. Moving it across the basement to a utility room might be straightforward, while relocating it to a different floor or far corner involves extensive duct

Question 10

Do I need a condensate pump for my furnace?

Accepted Answer

Most furnaces in Ottawa don't need a condensate pump, but high-efficiency furnaces (90%+ AFUE) do produce condensate that needs proper drainage. Whether you need a pump depends on your furnace type and basement layout.

High-efficiency condensing furnaces create water as a byproduct of the heating process. This condensate typically drains by gravity through a plastic tube to a floor drain, utility sink, or sump pit. You'll only need a condensate pump if your furnace is located where gravity drai

Question 11

Can I switch from oil heat to a gas furnace in Ottawa?

Accepted Answer

Yes, you can absolutely switch from oil heat to a gas furnace in Ottawa, provided natural gas service is available to your property. This conversion is quite common and often results in lower heating costs and improved convenience.

The conversion process involves several key steps. First, you'll need to confirm that Enbridge Gas has natural gas lines running to your street and can connect service to your home. Most areas within Ottawa have gas availability, but some rural properties may not. Yo

Question 12

What is the difference between single stage and two stage furnaces?

Accepted Answer

Single-stage furnaces operate at one fixed heat output level - they're either fully on or completely off. Two-stage furnaces have both a low-capacity setting (typically 60-70% of full capacity) and a high-capacity setting, allowing them to better match your home's heating needs.

Single-stage furnaces work like a basic on/off switch. When your thermostat calls for heat, the furnace fires up at 100% capacity until the set temperature is reached, then shuts off completely. This creates noticeable

Question 13

Which furnace brand is most reliable?

Accepted Answer

Carrier, Lennox, and Trane are generally considered the most reliable furnace brands, with each offering excellent build quality and long-term performance when properly maintained. These manufacturers have decades of experience and consistently rank highest in reliability studies.

Carrier stands out for their variable-speed technology and solid warranty coverage, while Lennox offers some of the most energy-efficient models with their SLP series reaching up to 98.7% AFUE. Trane is known for thei

Question 14

What is a furnace draft inducer motor?

Accepted Answer

A furnace draft inducer motor is a small electric motor with a fan that creates negative pressure to safely vent combustion gases out of your furnace through the flue pipe. This motor starts up before your furnace ignites, pulling air through the heat exchanger and ensuring proper ventilation of dangerous gases like carbon monoxide.

The draft inducer motor is a critical safety component that's required on all modern gas furnaces in Ontario. When your thermostat calls for heat, the draft inducer

Question 15

What is a condensing furnace?

Accepted Answer

A condensing furnace is a high-efficiency gas furnace that captures and uses heat from water vapor in the exhaust gases, achieving efficiency ratings of 90% or higher. Unlike conventional furnaces that vent hot exhaust gases directly outside, condensing furnaces have a second heat exchanger that extracts additional heat by cooling the exhaust gases until water vapor condenses back into liquid.

This condensation process is what makes these furnaces so efficient. The primary heat exchanger works

Question 16

Is a 96% AFUE furnace overkill for Ottawa?

Accepted Answer

A 96% AFUE furnace is not overkill for Ottawa - it's actually a smart investment given our harsh winters and rising energy costs. With Ottawa's heating season running roughly 7 months per year and natural gas prices continuing to climb, the efficiency gains pay dividends over the furnace's 15-20 year lifespan.

High-efficiency furnaces make particular sense in Ottawa's climate because we use our heating systems so extensively. A 96% AFUE unit wastes only 4% of the fuel it burns, compared to 20%

Question 17

How much does a new furnace cost installed in Ottawa?

Accepted Answer

A new furnace installation in Ottawa typically costs between $3,500 and $6,500, depending on the efficiency rating and complexity of the installation.

The price range breaks down into two main categories. Mid-efficiency furnaces (80-85% AFUE) generally cost $3,500 to $5,000 installed, while high-efficiency models (90-98% AFUE) range from $4,500 to $6,500. The higher upfront cost of efficient units is often offset by lower monthly gas bills and potential rebates.

Several factors influence the f

Question 18

What is the most efficient furnace for Canadian winters?

Accepted Answer

High-efficiency condensing furnaces with 95-98% AFUE ratings are the most efficient choice for Canadian winters, offering significant energy savings and reliable performance in our harsh climate.

Condensing furnaces are the gold standard for efficiency because they capture and reuse heat from exhaust gases that traditional furnaces waste. These units feature a second heat exchanger that extracts additional heat from combustion gases, achieving Annual Fuel Utilization Efficiency (AFUE) ratings o

Question 19

What size furnace do I need for a 2000 sq ft home?

Accepted Answer

For a 2000 square foot home in Ottawa, you'll typically need a furnace with 80,000 to 120,000 BTU capacity, but the exact size depends on several critical factors beyond just square footage.

Heat loss calculation is essential for proper furnace sizing. Your home's insulation quality, window efficiency, ceiling height, and air leakage all dramatically affect heating requirements. A well-insulated newer home might only need 80,000 BTU, while an older home with poor insulation could require 120,00

Question 20

Is a two stage furnace worth it?

Accepted Answer

Yes, a two-stage furnace is typically worth the investment for most Ottawa homeowners, especially considering our long heating season and variable winter temperatures. The energy savings and improved comfort usually justify the additional upfront cost within 5-7 years.

Two-stage furnaces operate at two heat output levels - typically around 65% capacity for milder weather and 100% capacity for the coldest days. This means during Ottawa's shoulder seasons (fall and early winter), your furnace run

Question 21

What is a modulating furnace and is it worth it

Accepted Answer

A modulating furnace is a high-efficiency heating system that can adjust its heat output anywhere from about 40% to 100% capacity, rather than just turning on and off like a traditional single-stage furnace. Think of it like a dimmer switch for your home's heating - it provides exactly the amount of heat needed at any given moment.

How modulating furnaces work: These systems use advanced controls and variable-speed components to continuously monitor your home's temperature and adjust the flame

Question 22

What is the best furnace brand for Ottawa winters

Accepted Answer

For Ottawa's harsh winters, the most reliable furnace brands are Lennox, Carrier, and Trane, all offering proven performance in extreme cold conditions down to -30°C and below. These manufacturers have strong dealer networks in Ottawa and parts availability when you need service.

High-efficiency condensing furnaces (96%+ AFUE) are ideal for Ottawa's long heating season, typically running from October through April. Lennox's SLP98V and Carrier's Infinity series are particularly well-suited for o

Question 23

What is a good AFUE rating for a furnace in Ottawa

Accepted Answer

For Ottawa's climate, look for a furnace with an AFUE rating of 90% or higher, with 95-98% being ideal for maximum efficiency and comfort.

AFUE (Annual Fuel Utilization Efficiency) measures how much of your fuel gets converted to heat versus what goes up the chimney. In Ottawa's harsh winters where your furnace runs heavily from November through March, every percentage point of efficiency translates to real savings on your heating bills.

Mid-efficiency furnaces (80-85% AFUE) are the minimum st

Question 24

How much does furnace repair cost in Ottawa

Accepted Answer

Furnace repair costs in Ottawa typically range from $200 to $600, depending on the specific issue and parts needed. Simple fixes like thermostat problems or clogged filters are on the lower end, while component replacements like blower motors or heat exchangers fall on the higher end.

Common repair costs include diagnostic fees ($100-150), ignitor replacements ($200-300), blower motor repairs ($300-500), and gas valve issues ($400-600). Most HVAC companies charge a service call fee of $150-250,

Question 25

Two-stage vs single-stage furnace - which is better

Accepted Answer

Two-stage furnaces are generally better for most Ottawa homes because they provide more consistent heating, better comfort, and improved energy efficiency compared to single-stage units.

A single-stage furnace operates like a simple on/off switch - it runs at full capacity every time it kicks on, then shuts off completely when the temperature is reached. This creates temperature swings in your home and uses more energy because it's always running at 100% output, even on milder days when you don

Question 26

Why does my furnace keep turning on and off

Accepted Answer

Short cycling is when your furnace turns on and off frequently without completing full heating cycles, and it's one of the most common HVAC issues Ottawa homeowners face during our cold winters.

The most likely culprit is a dirty air filter. When your filter is clogged with dust, pet hair, and debris, it restricts airflow over the heat exchanger. This causes the furnace to overheat and shut down as a safety measure, then restart once it cools down. Check your filter right away - if it's gray or

Question 27

What size furnace do I need for my Ottawa home

Accepted Answer

Furnace sizing depends on your home's heat loss calculation, which considers square footage, insulation, windows, and Ottawa's cold climate requirements. A properly sized furnace is crucial for efficiency, comfort, and longevity.

Heat loss calculations are the only accurate way to determine furnace size. This involves measuring your home's envelope, assessing insulation levels, counting windows and doors, and factoring in Ottawa's design temperature of -23°C. A furnace that's too small won't ke

Question 28

Should I repair or replace my old furnace

Accepted Answer

The decision between repairing or replacing your furnace depends on its age, repair costs, and efficiency. As a general rule, if your furnace is over 15 years old and repair costs exceed 50% of replacement value, replacement is usually the better investment.

Age is the primary factor in this decision. Furnaces typically last 15-20 years with proper maintenance. If your unit is approaching or past this age, even a successful repair is likely a temporary fix. Older furnaces also operate at much l

Question 29

How do I know if my furnace heat exchanger is cracked

Accepted Answer

A cracked heat exchanger is a serious safety issue that requires immediate professional inspection. You cannot safely diagnose this yourself, as it involves potential carbon monoxide exposure, but there are warning signs to watch for.

Common warning signs include unusual sounds like rattling or banging from the furnace, visible rust or corrosion around the furnace cabinet, and soot buildup near the unit. You might notice the furnace cycling on and off more frequently than normal, or strange odo

Question 30

What are the signs my furnace needs replacement

Accepted Answer

Your furnace likely needs replacement if it's over 15-20 years old and showing multiple warning signs, or if repair costs exceed 50% of replacement value. The most critical indicators are frequent breakdowns, rising energy bills, and uneven heating throughout your home.

Age is the primary factor - furnaces typically last 15-20 years with proper maintenance. If your unit is approaching or exceeding this range, replacement becomes more cost-effective than ongoing repairs. In Ottawa's harsh winter

Question 31

How long does a furnace last in Ottawa

Accepted Answer

Most furnaces in Ottawa last 15-20 years with proper maintenance, though this can vary significantly based on the furnace type, usage patterns, and how well it's been maintained throughout its life.

High-efficiency furnaces (90%+ AFUE) installed in the last 15 years typically have better longevity than older, less efficient models. The harsh Ottawa winters mean your furnace works harder than in milder climates, which can impact lifespan. A furnace that runs constantly during those -30°C cold sn

Question 32

How much does furnace installation cost in Ottawa

Accepted Answer

Furnace installation in Ottawa typically costs between $3,500 and $6,500, depending on the efficiency rating, size, and complexity of the installation. Mid-efficiency furnaces (80-85% AFUE) generally range from $3,500 to $5,000, while high-efficiency models (90-96%+ AFUE) cost $4,500 to $6,500 installed.

The total cost includes the furnace unit, installation labor, TSSA permit, gas line connections, and basic ductwork modifications. High-efficiency furnaces cost more upfront but provide signifi

Question 33

Why is my furnace blowing cold air

Accepted Answer

Your furnace is likely blowing cold air due to a thermostat issue, dirty air filter, pilot light problem, or a malfunctioning component like the ignition system or gas valve. The most common causes are simple fixes, but some require professional attention for safety reasons.

Start with the basics first. Check that your thermostat is set to "heat" mode (not "cool" or "auto") and the temperature is set higher than the current room temperature. Make sure the fan setting is on "auto" rather than "o

Question 34

How often should I replace my furnace filter

Accepted Answer

Most furnace filters should be replaced every 1-3 months, but the exact timing depends on your filter type, home conditions, and usage patterns.

Standard 1-inch pleated filters typically need replacement every 30-60 days during heating season. If you have pets, allergies, or live in a dusty area, lean toward monthly replacement. Thicker filters (4-5 inches) can often go 3-6 months between changes since they have more surface area to capture debris.

Check your filter monthly by holding it up to

Question 35

What causes a furnace to stop working in winter

Accepted Answer

Furnace failures in winter typically stem from a few common issues, with clogged air filters being the most frequent culprit. When your furnace stops working during Ottawa's harsh winters, it's usually due to restricted airflow, thermostat problems, or safety system shutdowns.

Clogged air filters are responsible for about 80% of furnace breakdowns. When filters become packed with dust, pet hair, and debris, airflow becomes restricted, causing the furnace to overheat and shut down as a safety me

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