HVAC Cost & Buying Questions, Answered

Verify TSSA gas licensing and liability insurance, confirm they pull any permit the job needs, and get itemized written quotes from two or three companies.

Yes.

For most homeowners with equipment over 5 years old, yes.

Beyond rate increases, the usual culprits are an aging or poorly maintained furnace losing efficiency, a clogged filter forcing longer run times, leaky ductwork dumping heated air into the basement, air leaks around doors and attic hatches, and thermostat habits like heating an empty house.

A chronically cold room usually means weak airflow to that room: a closed or blocked damper, crushed or leaky duct run, or a register hidden under furniture.

A cold-climate heat pump in Ontario typically costs $6,000–$16,000 installed before rebates, depending on system size, whether it's ducted or ductless, and whether it replaces or works alongside your furnace.

An HVAC service call in the GTA typically costs $90–$150 for the diagnostic fee, which covers a technician coming out and finding the problem.

Yes — quotes for a new furnace, air conditioner, or heat pump installation are almost always free in the GTA, including in-home assessments and itemized written pricing.

Less than you'd think.

Yes, absolutely.

Replacing a furnace and air conditioner together in the GTA typically runs $7,500–$11,500 installed, depending on efficiency tier and home size.

A new boiler in Ontario has no single price.

An HRV's installed price is set by how it is ducted, not by the unit's rated airflow.

A whole-home humidifier mounted on the furnace runs $500–$1,200 installed in most GTA homes.

Smart thermostat installation is mostly labour, and the labour depends on your wiring.

Gas line pricing comes down to length, pipe size and how hard the route is to run, not a flat per-appliance rate.

Garage heater pricing depends on three things: the heater type — a gas unit heater versus a low-intensity infrared tube heater — whether gas and power already reach the garage, and how the exhaust gets out.

New ductwork is priced by how much sheet metal has to be fabricated and hung and by how hard the space is to work in, not by the size of the house.

A commercial rooftop unit is quoted per unit, and the equipment is often the smaller half of the number.

HVAC for a new build prices in two halves.

Most Ontario HVAC contractors price repairs flat-rate — one number approved before the work starts, covering the part, the labour and the callback warranty — and price installations as a package built from equipment, crew hours, sheet metal, venting, any permit the job needs and disposal.

Compare HVAC quotes by first making them describe the same job: same capacity, same efficiency ratings, same matched indoor and outdoor models.

A parts warranty is the manufacturer's promise to supply a replacement component; a labour warranty is the contractor's promise to install it without billing you for the time.

For a house on the gas grid, the cheapest way to heat in Ontario is still a high-efficiency condensing gas furnace, because natural gas delivers more heat per dollar than electric resistance.

The most efficient heating system for Ontario is a cold-climate air-source heat pump: it moves heat instead of burning fuel, so it delivers two to three units of heat for every unit of electricity through most of our winter.

A financed furnace in the GTA usually lands between $60 and $150 a month.

For a 2,000 sq ft home in this region, a high-efficiency furnace replacement typically runs $4,500–$7,500 installed, a furnace and air conditioner together $7,500–$11,500, and a cold-climate heat pump $9,500–$15,000 before rebates.

For a residential furnace, air conditioner or heat pump install in Ontario, a deposit of about 10 percent is normal: enough to hold the date and order the equipment, with the balance due once the system is installed, started up and tested.

No municipal building permit is needed for gas piping in Ontario.

An HVAC maintenance plan in Ontario that covers one furnace tune-up in the fall and one AC or heat pump tune-up in the spring typically costs $150–$350 per year.

On a rented water heater or furnace, the rental company pays to repair or replace the unit when it fails from normal use, and you must book through its service line.

A tenant in Ontario can call an HVAC company, but the furnace, air conditioner and water heater belong to the landlord, so repairs need the landlord's approval.

In most Ontario condos the owner is responsible for the fan coil inside the unit: the fan motor, control valve, thermostat, drain pan and condensate line.

In an Ontario commercial lease, HVAC responsibility is whatever the lease says: the Commercial Tenancies Act does not assign it.

A home inspection is not enough to clear a furnace and AC.

Usually no.

You need a new thermostat with a heat pump if the old one has no O/B terminal for the reversing valve, no AUX or W2 terminal for backup heat, or no C-wire.

An HVAC installation contract should name the equipment by brand, model number, efficiency rating and BTU size, list every part of the scope (venting, gas line, electrical, thermostat, removal), and give start and finish dates.

Some HVAC contractors will install a furnace you bought yourself, but many licensed ones decline.

Yes.

If your HVAC contractor did a bad job, start with a dated, written deficiency list to the installer and a deadline to fix it under the contract and labour warranty.

You can spot most HVAC scams in Ontario by three signs: someone arrives or calls uninvited, claims to be from the utility or the government, and wants a signature today.

Yes, you can get a furnace quote without a home visit, but what you get is a range, not a firm price.

A NOSI, or notice of security interest, is a registration on your home's land title showing that a company claims an interest in a fixture such as a rented or financed furnace, air conditioner or water heater.

To remove an HVAC lien from your house title in Ontario, first confirm it is a notice of security interest (NOSI) for a rented or financed furnace, air conditioner or water heater.

You need condo board approval to replace an AC or heat pump whenever the work touches common elements: an outdoor unit on a roof, balcony or exterior wall, or new holes for refrigerant lines.