We install furnaces, heat pumps, and air conditioners across Ontario — properly, quickly, and at a price that makes sense. No runaround, no hidden fees.
Real people answer — no phone trees, no waiting on hold.
We handle the full range — from replacing an aging furnace to installing a whole-home heat pump system. All work is done by licensed technicians with quality equipment.
Book a free in-home assessmentGreenTemp was built around one idea: Ontario homeowners deserve fast, honest HVAC service without the upsell pressure or the three-week wait. Our technicians are fully certified, show up when they say they will, and treat your home with respect.
We handle everything from the quote to the install — and we stay available if something doesn't feel right afterward. That's the whole deal.
A new HVAC system is a big purchase. We offer monthly payment plans that make premium equipment accessible — with an approval decision right at your in-home consultation.
Takes two minutes. We'll ask a few questions about your home and set up a free in-home visit at a time that works for you.
A certified technician visits, checks what you've got, and gives you an honest quote with nothing left out. No pressure, no obligation.
We'll walk you through the right equipment for your home and budget. If you want to finance, the application takes minutes and you get a decision right there.
Our team arrives on time, completes the install cleanly, walks you through everything, and leaves your home exactly as they found it.
"Furnace died on a Tuesday night. GreenTemp was here for a quote Wednesday morning and the new unit was running by Thursday afternoon. I genuinely didn't think that was possible."
"The financing made it possible to get the heat pump we've been putting off for two years. The tech explained everything clearly, and the install was spotless. Zero complaints."
"I've dealt with a few HVAC companies over the years and the difference with GreenTemp is that nobody tried to upsell me. Just a fair quote, clean work, and out the door. I'll be referring everyone I know."
Get a free in-home quote from a certified GreenTemp technician. No pressure, no obligation — just honest advice and a price upfront.
No obligation · We'll be in touch within a few hours
A GreenTemp specialist will reach out within a few hours to arrange your free in-home visit.
From furnace installs and heat pumps to water heaters and smart thermostats — our licensed technicians handle it all across Ontario. Same-week availability, upfront pricing, no surprises.
Select a service below to learn more about what's involved, what signs to watch for, and how GreenTemp keeps Ontario homes running right year-round.
Installation, repair & maintenance for all furnace types.
Learn moreYear-round heating and cooling in one efficient unit.
Learn moreCentral AC installs and ductless split systems.
Learn moreTank and tankless water heater replacements.
Learn moreSmart thermostats, zoning & climate control upgrades.
Learn moreTell us a bit about your home and a GreenTemp technician will help you figure out exactly what you need — no pressure, no obligation.
Book a free in-home assessmentGreenTemp installs, repairs, and services furnaces from all major manufacturers across Barrie, Newmarket, Toronto, Mississauga, Brampton, Vaughan, Markham, Scarborough, Ajax, Oshawa, Peterborough, and Kawartha Lakes, and surrounding areas. Licensed techs, same-week availability, no hidden fees.
Precise, code-compliant installations for gas and electric furnaces of all makes and sizes. We size correctly for your square footage so you're never paying to heat air you don't need.
Furnace acting up in the middle of a cold snap? Our technicians are available for rapid-response diagnostics and repairs — most jobs resolved same day.
Scheduled maintenance keeps your system running efficiently, catches small issues before they become expensive breakdowns, and extends the life of your unit by years.
Catching problems early saves you money. If you're seeing any of these, give us a call.
Banging, rattling, or squealing often indicate worn components or loose parts.
Some rooms cold, others warm? Could be airflow or a failing heat exchanger.
A sudden spike in heating costs usually means the furnace is losing efficiency.
Constantly turning on and off signals thermostat, airflow, or heat exchanger issues.
Excess dust or worsening allergies can mean your furnace isn't filtering effectively.
Should always be blue. Yellow or orange means incomplete combustion — a safety issue.
Older units lose efficiency fast. A modern high-efficiency furnace can cut bills by up to 30%.
If you're calling for repairs regularly, replacement is usually more cost-effective.
Burning, gas, or musty smells are all warning signs that need professional attention.
A blower or heat exchanger issue may be pushing unconditioned air through your home.
Difficulty igniting or a pilot that won't stay lit can indicate serious safety concerns.
Surface deterioration on key components often means it's time for a full replacement.
We visit your home, assess the current system, measure your space, and review your heating needs. No charge, no obligation.
We recommend the right furnace type, size, and efficiency rating for your home and budget — and walk you through the options clearly.
Our certified techs complete the install to Ontario code, with full cleanup and a walkthrough of your new system before we leave.
We check in after every install and offer annual tune-up plans to keep your furnace performing at peak efficiency for years.
Every tech on our team is fully certified and insured — you'll never have an uncredentialed person working on your heating system.
We quote before we start. No surprise charges when the job is done. What we say it costs is what you pay.
Most installations are booked within 24–48 hours. Emergency calls handled as priority.
Monthly payment options available — so a new furnace is never out of reach.
Parts and labour warranties on all installations. We stand behind our work.
We live and work in the communities we serve — Barrie, Newmarket, Toronto, Ajax, Oshawa, Peterborough, Kawartha Lakes and beyond.
No obligation · We'll be in touch within a few hours
A GreenTemp specialist will reach out within a few hours.
Heat pumps are the most energy-efficient way to heat and cool a Canadian home. GreenTemp installs air-source and cold-climate heat pumps across Ontario, including rebate-eligible models that can save you thousands.
Extract heat from outdoor air even in cold temperatures. Modern units work efficiently down to –25°C, making them perfect for Ontario winters.
No existing ductwork? No problem. Ductless splits heat and cool individual rooms or zones with minimal installation disruption.
Pairs a heat pump with your existing gas furnace. The pump handles mild weather efficiently; the furnace kicks in on the coldest days. Best of both worlds.
Heat pumps move heat rather than generate it, making them 2–3× more efficient than a gas furnace at comparable outdoor temperatures.
Replaces both your furnace and air conditioner, reducing the number of systems to maintain.
Qualifying systems may receive up to $5,000 in rebates through provincial and federal programs. We help you navigate the paperwork.
Electric-powered and significantly lower in emissions than fossil fuel heating — especially as Ontario's grid gets cleaner.
Higher upfront cost is typically recovered within 4–7 years through energy savings, and units last 15–20 years.
No blasts of hot air — heat pumps deliver a steady, even temperature that most homeowners find more comfortable.
We evaluate your home's layout, insulation, existing ductwork, and heating/cooling patterns to recommend the right system type and capacity.
We identify all provincial and federal rebates your project qualifies for and walk you through financing options so you know the full picture upfront.
Our certified technicians handle everything — outdoor unit placement, refrigerant lines, indoor air handler, electrical connections, and system commissioning.
We show you how to operate your new system, register your warranties, and leave you with documentation. Follow-up support is always available.
We only install heat pumps rated for Canadian winters — no equipment that'll leave you cold when the temperature drops.
We handle the rebate paperwork on your behalf so you capture every dollar you're entitled to.
Monthly payment plans available — no payment, no interest options available on qualifying installations.
Full coverage on installation and equipment so you're protected long after we leave.
Every installer is licensed, insured, and trained on the specific equipment they're working with.
We're based in the communities we serve and take follow-up calls seriously — not a call centre in another province.
No obligation · We'll be in touch within a few hours
A GreenTemp specialist will reach out within a few hours.
Whether you're replacing an aging central AC or adding cooling to a home that's never had it, GreenTemp's certified technicians install the right system efficiently and correctly — the first time.
New central AC units paired with your existing furnace and ductwork. We size properly for your home to ensure even cooling and maximum efficiency.
Individual room or zone cooling without ductwork. Perfect for additions, older homes, or spaces that don't connect to your central system.
Not cooling properly? We diagnose and repair all major AC brands, and offer pre-season tune-ups to keep your unit running at peak efficiency.
If your AC is running but not cooling, low refrigerant, a dirty coil, or compressor failure may be to blame.
Weak airflow throughout the home usually points to a failing compressor or blocked ductwork.
Constantly switching on and off? Often a sign of an oversized unit or a refrigerant issue.
A well-functioning AC removes moisture. If your home feels sticky, the system may need attention.
Moisture or pooling water around your indoor unit can indicate a clogged condensate drain or refrigerant leak.
Grinding, squealing, or banging often indicate mechanical issues that worsen if left unaddressed.
A sudden increase in your electricity bill during summer often means your AC is working harder than it should.
Older units lose efficiency significantly each year. A modern AC can reduce cooling costs by 20–40%.
Musty smells can indicate mould in ductwork or on the evaporator coil — a health concern worth addressing promptly.
We assess your home's cooling load, check existing ductwork, and evaluate your electrical panel capacity to design the right system.
We present equipment options with full pricing — including installation — so there are no surprises. We explain the efficiency ratings and expected energy savings for each.
Our licensed team installs your new system, handles all refrigerant work, connects to your existing system, and tests full operation before leaving.
We register your warranty, answer any questions about operation, and offer annual maintenance plans to keep your AC at its best.
We never guess on sizing. An AC that's too big or too small wastes energy and wears out faster — we size it right.
We install and service all leading HVAC brands — not just one — so you get the best equipment for your specific needs.
Handling refrigerant requires certification. Every GreenTemp tech working on cooling equipment is properly certified and insured.
New AC installation with flexible monthly payments. No interest options available for qualified customers.
Ontario summers move fast — we get you booked quickly so you're not suffering through a heatwave waiting for an appointment.
Full parts and labour warranty on all new installations. We stand behind our work from day one.
No obligation · We'll be in touch within a few hours
A GreenTemp specialist will reach out within a few hours.
Tank or tankless, gas or electric — GreenTemp installs and replaces water heaters across Ontario quickly and at a fair price. Most installs completed same day.
Reliable, affordable hot water storage in 40–60 gallon tanks. Natural gas and electric options available. Starting from $21.99/mo with installation included.
Heats water only when you need it — no standby heat loss. Endless hot water and up to 40% lower energy costs. Starting from $36.99/mo with installation included.
Existing unit failing or already dead? We'll assess, recommend, and install a replacement fast — often same day — so your household isn't without hot water for long.
Both types have their advantages. Here's a quick breakdown to help you decide — and our techs are always happy to walk you through the specifics for your household.
| Feature | Tank Water Heater | Tankless Water Heater |
|---|---|---|
| Hot water supply | Stored — runs out with heavy use | Unlimited, on-demand |
| Energy efficiency | Good — some standby heat loss | Excellent — no standby loss |
| Monthly cost (approx.) | From $21.99/mo | From $36.99/mo |
| Installation time | 2–4 hours | 4–8 hours |
| Unit lifespan | 10–15 years | 20+ years |
| Space required | Larger footprint | Very compact, wall-mounted |
| Best for | Budget-conscious households | Large families & high usage |
Complete failure to heat water is the most obvious sign — call us for a same-day assessment.
Brown or orange water from your hot tap often means the tank is corroding from the inside.
Sediment buildup on the tank floor causes these sounds and reduces efficiency significantly.
Any pooling water near your tank should be investigated immediately — often indicates a leak or crack.
Water running hot then cold is a sign of a failing heating element or thermostat.
Most tanks are designed for 10–15 years. Replacing proactively avoids an emergency situation.
Hot water is a necessity. We prioritize water heater calls and can often complete a replacement the same day you contact us.
On all water heater installations — no hidden labour charges added after the quote.
Both tank and tankless units come with full 10-year coverage on parts and the installation itself.
Flexible payment plans available for both tank and tankless options — no large upfront cost required.
Our techs are licensed for both gas line connections and electrical work — we handle the full scope of the job.
We'll tell you whether a repair or replacement makes more financial sense — and we won't push you toward a more expensive unit than you need.
No obligation · We'll be in touch within a few hours
A GreenTemp specialist will reach out within a few hours.
Smart thermostats, zoning systems, and climate control upgrades that let you manage your home's comfort from anywhere — and cut energy waste automatically. Installed and configured by GreenTemp technicians.
We supply and install leading smart thermostats including Google Nest, Ecobee, and Honeywell Home — fully wired, configured, and connected to your Wi-Fi before we leave.
Control the temperature of different areas of your home independently. Great for two-storey homes, finished basements, or additions that need separate temperature management.
Older or basic thermostats can be upgraded to smart models without a full system replacement. We assess compatibility and handle all wiring cleanly and professionally.
All units below are compatible with most GreenTemp-installed heating and cooling systems. Our technicians will confirm compatibility during the quote visit.
| Model | Key Features | Best For |
|---|---|---|
| Google Nest Learning Thermostat | Learns your schedule, auto-adjusts, Google Home & Alexa compatible | Tech-savvy homeowners who want hands-off automation |
| Ecobee SmartThermostat Premium | Room sensors for multi-room temperature balancing, Siri, Alexa, Google | Larger homes with hot/cold spots |
| Honeywell Home T9 | Smart room sensors, humidity control, geofencing | Families with variable schedules |
| Nest Thermostat E | Simple design, energy-saving features, budget-friendly smart option | First-time smart thermostat buyers |
| Sensi Touch 2 | Touchscreen, energy usage tracking, demand response support | Utility rebate programs & energy tracking |
Smart thermostats learn your habits and adjust automatically — heating or cooling only when and where it's needed.
Adjust temperature from your phone whether you're at work, on vacation, or just don't want to get up from the couch.
Set different temperatures for morning, daytime, evening, and overnight — automatically, every day.
Some models detect when you're leaving or arriving home and adjust temperature automatically — no programming needed.
Track runtime, get maintenance reminders, and receive alerts if your system behaves unexpectedly.
Compatible with gas furnaces, heat pumps, central AC, and most boiler systems — no HVAC upgrade required in most cases.
We confirm your HVAC system's wiring is compatible and recommend the right thermostat model for your setup and goals.
We photograph and label all existing wiring, remove the old unit safely, and prepare the wall cleanly for the new thermostat.
The new thermostat is wired correctly, mounted cleanly, and tested across all heating and cooling modes before we move on.
We connect the thermostat to your home network, set up the app on your phone, configure your schedule, and walk you through every feature before we leave.
No obligation · We'll be in touch within a few hours
A GreenTemp specialist will reach out within a few hours.