
Furnaces
Upgrading your furnace?
Types of furnaces
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Oil furnaces are typically no longer covered by insurance providers and are very costly to operate. Clockwork HVAC can pump out the remaining oil in your existing tank, disconnect and remove it and convert your home heating system to a different source that is available to you, such as natural gas or propane.
We offer professional installation of oil conversion, ensuring your system operates safely and efficiently.
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Natural gas furnaces are a popular choice for many homeowners due to their efficiency and reliability. These furnaces use natural gas to generate heat, providing a cost-effective heating solution.
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Most furnaces that are available for natural gas use can easily be converted for propane use. Propane furnaces do provide excellent heat but are typically only used when natural gas isn’t available in your location because they tend to cost more to heat your home than natural gas and require large storage tanks on the premises.
Clockwork HVAC can offer additional alternative heat sources to use, such as a heat pump or wood furnace/stove, and keep your propane furnace as a backup heat source to save on fuel costs.
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Electric furnaces offer a clean and efficient heating solution, particularly for those who want to avoid the use of fossil fuels or can’t access natural gas. These systems use electricity to heat air, which is then distributed throughout your home.
Electric systems do not use gas and it is typically less expensive to heat your home with electricity so you can expect significant energy savings on your utility bills. However, electric heating does generally create a drier home climate. This can be offset by installing a full home humidifier. If switching to electric, it is also important to understand that the heat will feel different than gas or oil.
The air coming from the registrar will feel cooler to the touch than your previous furnace but it will still reach the same temperature on your thermostat. This is because of the science of how our bodies perceive heat.
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Wood furnaces require the least amount of electricity to operate and do not require fossil fuels. Heating your home with wood provides a very pleasant and cozy type of warmth.
Clockwork HVAC offers wood furnaces that can be connected directly to your ductwork, along with a chimney for ventilation, to distribute heat throughout your entire home. It can even be programmed to connect with a backup gas, propane, or electric furnace which would automatically come on in times when the wood furnace used up its supply.
Furnace buying guide
Learn more about the different types of furnaces, features available, and make informed choices about what type of furnace is right for your home.
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There are many energy source options available to Ottawa homeowners:
Natural gas is the most common choice due to its efficient heating and availability.
Propane gas is more expensive than natural gas but if natural gas is not available where you live, it is a good alternative. Any natural gas furnace can be converted for propane use.
If you are still heating your home with oil expect to need to change heating sources soon. Insurance companies are increasingly limiting their coverage of oil heating systems. Clockwork is able to recover the oil, disconnect and remove the entire system. We also complete your application for natural gas service and install the gas piping to connect a new gas furnace. You’ll see significant utility bill savings. Find out if you are eligible for natural gas service by simply typing in your postal code to Enbridge’s service locator tool.
Wood - a classic comfort, wood furnaces are no longer common in Ottawa, however, they can be a nuisance to maintain as they require continuous adding of logs. Our wood furnace can be paired with a backup gas furnace that will seamlessly takeover the heating when the wood gets low. No more waking up in the middle of the night to stoke the fire and no need to worry if you are away from home.
Electric - already the most popular heating choice in Quebec, Ottawa homeowners are increasingly deciding to heat with electricity as means to utilize a cleaner more environmentally friendly heating option.
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AFUE (Annual Fuel Utilization Efficiency) measures how well your furnace is able to convert fuel into heat. In Ottawa all new furnaces sold are rated at 92% AFUE or higher. The higher the rating, the more efficient the furnace. For example, a furnace with a 96% AFUE rating would convert 96% of the fuel it receives into heat. The other 4% of fuel energy is utilized in the conversion process or burned off.
Ultimately your fuel type, home size, home construction, and desired heat settings all fluctuate the end results of your furnace’s efficiency.
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There are three types of operating style: single stage, 2 stage, and modulating.
Single stage furnaces operate at full power until desired temperature is reached and then shut off.
2 stage furnaces primarily operate at low power, using high power mode only when there are significant temperature drops and the extra boost is needed. 2 stage furnaces are significantly more energy efficient and offer superior heating compared to single stage furnaces.
Modulating furnaces offer a wide range of power levels and continuously switch from mode to mode to match the required temperature need. Modulating furnaces offer the most precise temperature control and energy efficiency.
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The blower motor is your systems fan; this is the part of our HVAC system that allows the conditioned air to circulate through your home.
Constant torque motors function at one continuous speed while the furnace is running.
Constant torque have independent speeds for heating and cooling and will always operate at one constant speed. While these fan types may offer more consistent temperature they are not the most energy efficient because they are working even when they do not need to be and are generally noisier.
Variable speed motors adjust their speed to meet the system’s needs at any given time. Variable speed motors are more energy efficient and distribute air more evenly, creating greater home comfort.
ECM fans work in the same type of way as variable speed motors but offer even greater energy efficiency as they operate using DC current rather than AC current, requiring less power.
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You want to ensure your contractor sizes your furnace correctly. A unit that is too small will not have enough power to adequately heat your home. A unit that is too large will warm your home too quickly and then the temperature will drop quickly, causing the furnace to come back on. This frequent coming on and off of the furnace will leave you with inconsistent temperature and it is difficult on the system, reducing its lifespan.
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There are many new technologies available for increased ease. This includes wifi connections so you can receive error codes and unit updates, change the unit settings, monitoring your equipment directly from your phone while you are away, and connecting to other bluetooth devices such as Alexa and Google.
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Look for a unit that offers a 10 year warranty or greater. Ensure that the warranty is promptly registered by the contractor or by yourself, the homeowner. Some furnace brands have a policy that if the warranty is not registered within a certain number of days from installation, it no longer qualifies. Some companies may also offer additional extended warranties that cover parts that may be missing from the manufacturers warranty and even labour costs for repairs. Be sure to get all the details ahead of time.
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If the unit is not installed properly it will not operate properly.
Choose a contractor who is licensed by TSSA, insured, and experienced. You can find out if a contractor is licensed through TSSA by searching their company here.
There are additional factors you may wish to consider such as Google reviews, Better Business Bureau complaints, or other third party reviews.
Ultimately you want to choose a contractor you feel comfortable with and who is willing to answer all your questions.

Benefits of upgrading your furnace
Ottawa’s best furnaces
Amana AMVC96 Gas Furnace
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96% AFUE
Stainless-Steel Tubular Primary Heat Exchanger
Integrated communicating ComfortBridge™ Technology
Efficient and Quiet Variable-Speed Circulator Motor
Durable silicon nitride igniter
Two-Stage Gas Valve
Quiet, Two-Stage, Induced-Draft Blower
Continuous Air Circulation
Self-Diagnostic Control Board
Heavy-Gauge Steel Cabinet with Durable Finish
Thermally Insulated CabinetComfortBridge™ Technology
Stainless-Steel Tubular Primary Heat Exchanger
Efficient and Quiet Variable-Speed Circulator Motor
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Limited lifetime heat exchanger, lifetime unit replacement, 10 year parts. See warranty document for full details.
Amana AMVM97 Gas Furnace
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98% AFUE
Stainless-Steel Tubular Primary Heat Exchanger
Integrated communicating ComfortBridge™ Technology
Efficient and Quiet Variable-Speed Circulator Motor
Durable Silicon Nitride Igniter
Self Calibrating Modulating Gas Valve
Quiet, Variable-Speed, Induced-Draft Blower
Continuous Air Circulation
Self-Diagnostic Control Board
Heavy-Gauge Steel Cabinet
Thermally Insulated Cabinet
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Limited lifetime heat exchanger, lifetime unit replacement, 10 year parts. See warranty document for full details.
Goodman GR9T96 Gas Furnace
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Up to 96% AFUE Performance
Energy-efficient, multi-speed ECM blower motor
Heavy-duty, aluminized-steel tubular heat exchanger
Stainless-steel secondary heat exchanger
Two-stage gas valve provides quiet, economical heating
Durable Silicon Nitride igniter
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Limited lifetime heat exchanger, 10 year unit replacement, 10 year parts. See warranty document for specifics.
BOSCH BGH96 Furnace
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Up to 96% AFUE heating efficiency, ENERGY STAR rated
Reliable, proven two-stage design
Field convertible gas type for hassle-free installation, all furnaces come standard with a natural gas to propane gas conversion kit
2 stage gas valve with ECM motors for all models for quiet and efficient operation
Hot-surface ignition for dependable operation
Durable aluminized steel tubular heat exchanger and stainless-steel secondary heat exchanger
Pairs with Bosch BOVA15, BOVB18 or BOV*20 heat pumps, achieving a SEER2 rating of up to 18.5 and a HSPF2 rating of up to 9.0
Low profile cabinet construction allows for installation in tight spaces. Convenient left or right-hand connection for gas and electric service. The cabinet is painted galvanized steel with an anti-rust coating, that passes a 500 hours salt spray test
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Rheem R962V Gas Furnace
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Insulated cabinet for quieter operation
Variable speed airflow technology
96% AFUE, ENERGY STAR® certified
Two-stage heating operation
Variable speed motor technology
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Limited lifetime heat exchanger replacement, conditional 10 year unit replacement, limited 10 year part replacement.
Rheem R98MV Furnace
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Insulated cabinet for quieter operation
Variable speed airflow technology for quieter performance
98% AFUE, ENERGY STAR® certified
Modulating gas valve design allows for operation between 40% and 100% to continuously meet your specific heating needs, while the variable speed motor technology ensures a steady stream of perfect warmth and superior humidity control—together providing optimal comfort levels.
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Limited lifetime heat exchanger replacement, conditional 10 year unit replacement, limited 10 year part replacement.
Caddy Advanced PF01020 Wood Furnace
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If you’ve already got an oil, gas, or electric central heating system but want to add the flexibility of wood, the Caddy Advanced wood add-on furnace is for you.
The self-regulated combustion of the Caddy Advanced promises constant heat, while requiring minimal effort on your part; just fill the furnace, adjust the temperature and enjoy the heat for hours! The system automatically adjusts the air supply so that combustion is optimized and synchronized with the thermostatic demand.
This unit, which installs on either side of your existing system, uses the same controls and fan as your existing furnace, giving you a fully compatible wood+oil, wood+gas, or wood+electric combo system.
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Limited 10 year heat exchanger, combustion, and castings.
What to expect during a furnace installation
Gas to your home will be shut off, we have portable electric heaters to keep you comfortable
The existing system will be removed; expect us to lay out carpets to keep your home tidy
The new unit will be placed, connected to the power source, and venting and electrical connection will be installed
A condensate pump and drain will be installed
Your duct work will be adapted to the new unit, along with the filter cabinet
Your energy source will be turned back on, gas connections will be checked for leaks
The testing and commissioning of the new unit will be performed
Your technician will show you your new unit, explain how it operates, and answer any questions you may have
Your owner’s manual will be left with you
Your warranty will be registered for you
We will be available for ongoing questions, repairs, and maintenance afterwards
