We had a heat pump/AC unit installed by EHI, on time, on budget, great workmanship. Julian and team were knowledgeable and courteous. Dustin communicated well and is managing our government rebate for the new efficient system. Thank you Team!
Thunder Bay · Northwestern Ontario
Thunder Bay HVAC Services for Deep, Dry Northwestern Cold
Warm mornings, comfortable air and a backup plan
HVAC in Thunder Bay has two winter jobs: fire up reliably on the coldest morning of February, and keep the air inside from drying out like a cracker. We install and repair furnaces, add cold-climate heat pumps with dependable backup heat, and fit whole-home humidifiers so the house feels as warm as the thermostat says. You see the full price in writing before we pick up a tool.
- Furnace tune-ups that catch weak parts before winter
- Whole-home humidifiers for dry, static-charged air
- Heat pumps rated to -30°C, always paired with backup heat
- Up to $7,500 back for eligible non-gas homes
Voted Best Company 2019 to 2021 · Authorized Midea, Lennox, Kepler & Rinnai dealer, plus Goodman · 20+ years
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Why dry air makes a Thunder Bay house feel colder
Very cold air holds almost no moisture. When your furnace or heat pump warms that air, its relative humidity drops sharply, and the house ends up bone dry. Dry air pulls moisture from your skin, so the same thermostat setting feels a couple of degrees cooler. You get static shocks, itchy eyes and gaps opening between the floorboards.
A whole-home humidifier fixes that at the source. It mounts on the furnace or air handler and adds water vapour to the air as it's heated, so every room gets it, not just the bedroom with a tabletop unit. Many people find they can set the thermostat a little lower and feel just as warm.
The other half of a Thunder Bay winter is reliability. Furnaces need to start every morning, and heat pumps need a backup that carries the house when it drops past their rated range. We plan both together, so comfort and dependability come in one system.
- Humidifier controls that adjust to the outdoor temperature
- Condensate lines protected so they don't freeze overnight
- Cold-climate heat pumps paired with furnace or electric backup
- Annual tune-ups booked before the heating season
Thunder Bay heating complaints we hear every winter
Some of these are about warmth, and some are about the air itself. Both are fixable.
Static shocks, dry skin and cracked lips all winter
Your heating system is drying the air with nothing putting moisture back. A whole-home humidifier on the furnace or air handler brings indoor humidity back to a comfortable range.
Frost and water collect on the inside of the windows
Humidity is too high for the outdoor temperature. A humidifier with an outdoor sensor lowers its target automatically on the coldest days, and an HRV can bring in fresh, drier air when needed.
The furnace won't fire on the coldest morning
A weak ignitor, a dirty flame sensor or a condensate line that froze overnight are the usual suspects. Our TSSA-certified gas techs find the cause and fix it, and we protect drain lines that run through cold spaces.
The heat pump can't keep up in a deep cold snap
Push a heat pump past its rating and its output drops off. We pair a cold-climate unit with a furnace or electric air handler sized to carry the house alone, so the backup takes over automatically.
Fuel deliveries out in Shuniah or Neebing keep getting pricier
Let a cold-climate heat pump do the bulk of the heating, and keep the furnace or an electric air handler for backup. Homes heated by oil or propane can qualify for the higher rebate tier, up to $7,500.
Hardwood floors open up gaps every winter
Wood shrinks as it dries out. Holding indoor humidity steady with a whole-home humidifier keeps floors, trim and furniture from shrinking and swelling with the seasons.
Sound familiar?
Describe the problem and we'll tell you what it usually is, what it costs to fix, and whether it's worth fixing.
Heating and cooling in Thunder Bay: our services
Pick the service that matches your winter. Each page explains the options and costs.
Whole-home humidifiers in Thunder BayMoisture added through the ducts, controlled to suit the weather.Furnace repair in Thunder BayNo heat, ignition faults and frozen drains, priced before we start.New gas furnaces96% AFUE and up, with variable-speed blowers that suit a humidifier.Heat pumps for northwestern wintersMidea EVOX G3 and Kepler equipment with a -30°C heating rating.Heat pump with electric heat stripsElectric heat strips built in, for homes giving up oil or propane.Fresh-air ventilationFresh air without the drafts, and help with window condensation.Pre-winter tune-upsA yearly check before the furnace starts its long season.
HVAC in Thunder Bay: what furnaces, heat pumps and humidifiers cost
Starting prices for the jobs we quote most here. A visit turns these into one guaranteed price for your home.
| Equipment | When it fits | Installed price |
|---|---|---|
| High-efficiency gas furnace | An unreliable or aging furnace | From $3,300 |
| Cold-climate heat pump | Cutting oil, propane or gas use | From $5,500 |
| Heat pump with electric air handler | Going all-electric with built-in backup | Quote |
| Hybrid heat pump and furnace | Keeping the furnace for the deep cold | Quote |
| Whole-home humidifier | Dry air, static and gapping floors | Quote |
| Rinnai tankless water heater | Endless hot water and a freed-up corner | From $3,300 |
Installed pricing depends on size and installation requirements, and your quote is guaranteed once we agree on the scope. Homes heated by electricity, oil, propane or wood can qualify for up to $7,500 toward a qualifying cold-climate heat pump through the Home Renovation Savings Program, and gas-heated homes for a smaller amount. Eligibility and pre-approval get sorted before the install, because the terms can change. Financing runs 0% for 3, 6 or 9 months, with open loans from 2.99% OAC as another route.
Recent furnace and heat pump installs
These photos come from our jobs in other Ontario communities. The same careful venting, drains and stands go into every home we work on.
Why Ontario homes and businesses choose EHI Heating And Cooling
20+ years in Ontario homes
We've installed through more January cold snaps and July heat waves than we can count. That experience shows up in the sizing, the ductwork and the little details.
Voted Best Company 2019 to 2021
HomeStars Verified. Our reviews come from real Ontario homeowners and business owners.
Authorized Midea, Lennox, Kepler and Rinnai dealer, plus Goodman
Factory-backed equipment, factory-backed warranties, and techs trained on the gear we install. We install and service Goodman too.
Guaranteed final pricing
The number on your quote is the number on your invoice. We may also beat comparable reputable quotes by up to 10%.
Rebate paperwork handled
Pre-approval, heat-loss calculation and documentation for the Home Renovation Savings Program. You just sign.
Licensed, certified crews
TSSA-certified gas technicians, licensed refrigeration techs and ESA-licensed electrical work on every job.
Ready when you are
Call us or send the form. Quotes are free, guaranteed and come with your rebate estimate.
Port Arthur, Fort William and beyond
We serve homes across the city and the rural municipalities around it, from Current River to Oliver Paipoonge, including:
- Port Arthur
- Fort William
- Current River
- Westfort
- Northwood
- Shuniah
- Neebing
- Oliver Paipoonge
Fix the dry air and the cold mornings in one plan
One visit covers your furnace, your backup heat and your humidity, with a guaranteed price.
What Thunder Bay homeowners can expect: our customers in their own words
Rated 4.5 on Google and voted Best Company 2019, 2020 and 2021 on HomeStars.
4.5Google rating from verified customers
Replaces our AC with a new heat pump in Ottawa and the whole experience was outstanding. From the first call, Dustin was incredibly responsive and communicated clearly every step of the way. He cut through all the usual sales fluff and got straight to what mattered — options, costs, timelines, and what made the most sense for our home. They addressed every concern I had, explained the details discussed my technical questions, and handled the installation quickly and professionally. The quality of the work is excellent, everything was done cleanly, and the system has been running perfectly since. Pricing was fair and transparent, and there were no surprises. It’s rare to find a company that combines speed, honesty, and solid workmanship like this. Highly recommended.
Recently got a shiny new heat pump installed. Went very well, nice unit and it works soooo quietly. These fine folks were very easy to deal with, professional and thourough. Would highly recommend.
Efficient Home Improvements truly went above and beyond. Our furnace failed on Christmas Eve in Ottawa, and their team stayed up late (3:00am) that night to replace it. Their responsiveness, professionalism, and dedication during the holidays were exceptional. The work was completed efficiently, and everything was explained clearly. It’s rare to find a company willing to sacrifice their own holiday time to ensure a customer’s home is warm and safe. I highly recommend Efficient Home improvements to anyone in need of reliable and compassionate service.
I recently had a new furnace and tankless water heater installed by this company. Excellent service by both office and technicians , I highly recommend!
The Installers were great.. Got in and got the job done..the furnace works amazing compared to the old one !!! Need a furnace..A/C water tankless system..there your guys!!!!
Had a tankless water heater installed and couldn’t be happier. The installation was quick, professional, and the system works great — endless hot water and more efficient than my old tank. Highly recommend!
Dustin and his team were really responsive and helpful in getting us a new heat pump to replace our broken AC unit. The team went above and beyond helping us through the process and answering other questions about the house we recently moved in to. I would highly recommend Efficient Home Improvements for any of your HVAC needs.
Licensed HVAC Contractor · Serving Ontario for 20+ Years
Proudly Serving Thunder Bay, Ontario
EHI Heating And Cooling has kept Ontario homes and businesses comfortable for more than 20 years. Our licensed crews come to your home or business anywhere in Thunder Bay, with a written, guaranteed quote before any work starts.
- ServingThunder Bay, Ontario
- Phone1-647-694-5845
- Emailefficienthomecomfort@gmail.com
Business Hours
- Monday8:00 AM to 8:00 PM
- Tuesday8:00 AM to 8:00 PM
- Wednesday8:00 AM to 8:00 PM
- Thursday8:00 AM to 8:00 PM
- Friday8:00 AM to 8:00 PM
- Saturday8:00 AM to 8:00 PM
- Sunday10:00 AM to 5:00 PM
Emergency service available evenings, weekends and holidays.
We also serve communities near Thunder Bay
Other cities in Northern Ontario we serve
Every city gets the same licensed crews, guaranteed pricing and rebate paperwork. Pick yours for local details.
Frequently asked questions
What humidity should a Thunder Bay home have in winter?
Lower than in summer, usually somewhere around 30% to 40% on milder winter days and less during a deep cold snap, so the windows stay dry. A humidifier with an outdoor sensor adjusts this for you.
Is a whole-home humidifier worth it in Thunder Bay?
In most homes it pays off. It ends the static, dry skin and gapping floors, and the house often feels warmer at the same thermostat setting.
Why won't my furnace start on very cold mornings?
The usual causes are a weak ignitor, a dirty flame sensor, a blocked vent or a frozen condensate line. Our TSSA-certified gas technicians test each one and fix the real cause.
What backup heat should a Thunder Bay heat pump have?
Either your existing gas, oil or propane furnace in a hybrid setup, or an electric air handler with built-in heat strips. We choose based on your current fuel, ductwork and hydro costs.
How much can a Thunder Bay home get back on a heat pump?
Yes. Homes heated by electricity, oil, propane or wood can qualify for up to $7,500, and gas-heated homes for a smaller amount, through the Home Renovation Savings Program. Pre-approval must come before installation, and terms can change.
Who does heat pump installation in Thunder Bay with proper backup heat?
We do. Our crews install cold-climate heat pumps with backup heat in Thunder Bay and the surrounding area, and we schedule the work with you directly.
Page reviewed and updated October 27, 2026. Prices, rebates and program terms are checked at each update.