Before you choose your next system
Buying a new furnace, air conditioner or heat pump is a major investment in your home. Unfortunately, homeowners often spend most of their time comparing equipment model numbers, efficiency ratings and prices while overlooking something that may be even more important:
Who is actually designing, installing and looking after your new HVAC system? At AirZone HVAC Services, we believe a good HVAC consultation should involve much more than choosing between three equipment packages. Your salesperson should be able to explain how the system was sized, who will install it, what rebates are available, what happens after installation and why you should trust their company to be there years from now.
If you're gathering HVAC quotes in Ottawa, here are five questions to ask your HVAC contractor before signing a contract.
Do You Use Subcontractors?
This might be one of the most overlooked questions in the HVAC industry. When you purchase a new heating or cooling system, the person who sells you the equipment isn't usually the person installing it. So ask:
Who will actually be coming into my home to complete the installation? Some HVAC companies sell the job and then subcontract the installation to another company or independent crew. That doesn't automatically mean the installation will be bad. There are excellent subcontractors in the trades.
The issue is accountability and consistency. You should know:
- Who employs the installers?
- Who trained them?
- Who establishes the company's installation standards?
- Who is responsible if something isn't installed correctly?
- Who comes back if there is a problem?
- Is the installation crew familiar with the exact equipment being installed?
At AirZone, we do not subcontract our HVAC installations. Our installers and technicians are part of our AirZone team. That is important to us because we want control over the entire customer experience — from the original consultation and system design through installation, commissioning, maintenance and future service.
When our name is on the installation, we want our people doing the work.
How Do You Size My HVAC Equipment?
If the answer is:
"Your old furnace was 80,000 BTUs, so we'll put another 80,000 BTU furnace in." Ask more questions. Proper HVAC sizing should involve a heat-loss and heat-gain calculation, often referred to as a load calculation. A load calculation considers factors such as:
- Size and layout of the home
- Insulation levels
- Windows and doors
- Air leakage
- Orientation and solar exposure
- Ottawa's outdoor design temperatures
- Existing building improvements
- Heating and cooling requirements
HRAI’s equipment replacement guidance recommends performing a proper heat-loss and heat-gain calculation rather than relying on square-footage rules or simply replacing existing equipment with the same size. But there is another part of HVAC design that we think gets overlooked far too often:
The ductwork. Your furnace or heat pump doesn't heat and cool your home by itself. It has to move that conditioned air through your duct system. That means we also need to consider things like:
- Supply duct sizing
- Return-air capacity
- Available airflow
- Static pressure
- Register and grille sizing
- Blower requirements
- Existing comfort problems
A homeowner might technically need a certain capacity of equipment based on a load calculation, but the existing ductwork still has to be capable of delivering the required airflow. Installing larger equipment onto undersized ductwork can create noise, poor airflow, temperature differences, increased static pressure and equipment performance issues.
Good HVAC design looks at the house, the equipment AND the ductwork. That is why our consultations aren't simply about picking a furnace or heat pump out of a catalogue. We want the entire system to work together.
Explore our furnace installation, heat pump installation and air conditioning installation services.
Are There Any HVAC Rebates — And How Do They Work?
Always ask. Ontario’s HVAC rebate landscape has changed significantly, and the right program can make a meaningful difference to your project. The Home Renovation Savings Program offers heat-pump incentives that depend on your existing primary heating source, eligible equipment and system capacity. The advertised maximum is not the amount every homeowner will receive.
For example, the program’s heat-pump offer lists up to $7,500 for eligible cold-climate air-source installations in homes heated with electricity, oil, propane or wood. The listed maximum for eligible Enbridge natural-gas-heated homes is $2,000. Ask for the amount that applies to your home and proposed equipment.
For this heat-pump stream, you must choose a participating HVAC contractor. The contractor submits the pre-installation application, and approval must come before installation. They also submit the post-installation application. Ask about manufacturer offers, municipal options such as Better Homes Ottawa, eligible equipment, application steps and whether incentives can be combined. Have your contractor explain the requirements and show the expected rebate separately from the installed price.
Read our fall 2026 furnace and heat-pump rebate update for more context, or check our current HVAC rebates page before planning your purchase.
What Happens After the Installation?
This is a question homeowners often don't think about until something goes wrong. A new HVAC system might be expected to operate in your home for 15 years or longer. Your relationship with your HVAC contractor shouldn't end when the installation truck leaves the driveway.
Ask what happens afterward.
- Who do you call if you have a question?
- Does the company have its own service department?
- Do they provide maintenance?
- Will they service the equipment they installed?
- How are warranty issues handled?
- Do they stock commonly required parts?
At AirZone, we believe after-sale support is so important that we include our AirZone Family Membership with every qualifying new system purchase. We do this because we don't view installation day as the end of our relationship with a homeowner. It is the beginning. Regular maintenance allows us to inspect your equipment, identify potential problems, keep the system operating properly and continue looking after the equipment we installed.
When you're comparing HVAC quotes, don't only compare what happens on Day 1. Ask what the contractor will do for you on Day 500, Day 1,500 and beyond.
How Long Have You Been in Business — And What Experience Does Your Team Have?
HVAC companies come and go. That matters because many of the warranties being discussed during your sales consultation may extend 10 years or longer. So ask a simple question:
How long has your company actually been around? Then dig a little deeper. Experience shouldn't only mean how long the company name has existed. Ask:
- How experienced are the installers?
- Does the company employ licensed technicians?
- Do technicians receive ongoing manufacturer training?
Does the company have a dedicated service department?
- Do they have experience with the specific equipment you're considering?
- Will the company realistically be available if you need help several years from now?
AirZone has been serving homeowners throughout the Ottawa area for more than 20 years. During that time, HVAC technology has changed enormously. We have gone from conventional furnaces and basic central air conditioners to communicating controls, variable-capacity equipment, inverter heat pumps, cold-climate systems and new refrigerants.
That experience matters. But experience also means continuing to learn. The HVAC industry is evolving rapidly, which is why we believe the strongest contractor combines years of practical experience with ongoing technical education and modern system design.
Get to know our AirZone team and the people behind our local installation and service work.
The cheapest HVAC quote isn’t always the best quote
We understand that price matters. It matters to us too. But when comparing furnace, air conditioner or heat pump quotes in Ottawa, make sure you are comparing more than the model numbers at the bottom of the page. Ask:
- Who installs it?
- Who designed it?
- Was the ductwork evaluated?
- Are there legitimate rebates available?
- Who looks after me afterward?
- And will this company still be here when I need them?
Those answers can tell you much more about the value of an HVAC installation than the difference between two quoted prices. At AirZone HVAC Services, our goal isn't simply to sell homeowners equipment. We want to design a comfort system that works properly for your home, install it properly and be there to look after it for years to come.
Questions homeowners ask before buying
What questions should I ask an HVAC contractor before hiring them?
Ask who performs the installation, how the equipment will be sized, whether your ductwork will be evaluated, what rebates apply, what after-sale service is included and what experience the team has.
Should an HVAC contractor perform a load calculation?
A heat-loss and heat-gain calculation helps determine how much heating and cooling your home needs. Equipment should not be sized using square footage alone or simply by matching the size of the old equipment.
Why does ductwork matter when sizing a furnace or heat pump?
The equipment needs adequate airflow to work properly. Supply and return ducts, static pressure and available airflow should be considered alongside the heating and cooling requirements of the home.
Can every HVAC contractor offer Home Renovation Savings heat-pump rebates?
For the program’s heat-pump stream, you must use a participating HVAC contractor. Your contractor submits the pre-installation application, and approval is required before installation. Eligibility and rebate amounts depend on your home and equipment.
Does AirZone use subcontractors for HVAC installations?
No. Our HVAC installations are completed by our directly employed AirZone team rather than subcontracted installation crews.
What happens after AirZone installs my HVAC system?
Our team provides ongoing service, repairs and maintenance. Qualifying new system purchases include AirZone Family Membership. Ask us to confirm the included membership term, covered equipment and renewal details in your quote.
