Bosch Home Comfort — the business formerly badged Bosch Thermotechnology — sells two things GTA homeowners actually shop for: inverter-driven ducted heat pumps and condensing tankless water heaters. The heat pumps are the interesting product locally, because the inverter ducted split was designed to work with an ordinary 24-volt thermostat and to sit on the ducts you already have. That makes it one of the simpler ways to turn an existing gas-heated house into a dual-fuel one.
That matters in Halton more than it might elsewhere. A 1990s Millcroft or Glen Abbey two-storey usually has serviceable ductwork and a furnace with life left in it. Replacing only the outdoor unit with an inverter heat pump gives you efficient electric heating through most of the season while the gas furnace covers the deep cold, without gutting the mechanical room. Whether that is the right call for your house is a bill-and-load question, and the heat pump installation guide walks through how we work it out.
New Bosch equipment is also moving to A2L refrigerants such as R-454B, which changes leak-detection requirements, service procedures and the tools a shop needs to have. If you are quoted a system this year, ask what refrigerant it uses and whether the contractor is set up for it — our plain-English explainer is what the A2L refrigerant transition means for homeowners.
On the water side, the Greentherm condensing tankless line is serviced the same way any condensing unit is: annual descaling on our hard lake water, a clean condensate path, and venting that matches the manual. We are not in Bosch's dealer program; we buy the parts, do the work and file the claims on your behalf.
Bosch lines we install and service
A variable-speed outdoor unit that pairs with a matching air handler or with your existing gas furnace as the indoor section. It ramps rather than cycling on and off, which is quieter and holds temperature more evenly than a single-stage condenser. Its ability to run on conventional thermostat wiring is the reason it retrofits so cleanly into a house built in the last thirty years.
The heat pump handles heating down to a switchover point, then the gas furnace takes over for the coldest hours. You get lower operating cost through the shoulder seasons and the full recovery capacity of gas when the wind comes off the lake. Setting the switchover point sensibly for your gas and electricity rates is part of the commissioning, not an afterthought.
Wall-mounted ductless units for additions, converted garages and rooms the ductwork never reached properly. A single-zone system installs for $4,000–$7,000. It is the right tool for one stubborn room, and a poor substitute for fixing a whole-house airflow problem.
Wall-hung condensing units with PVC venting and, on some models, built-in recirculation. They install into the same footprint as a Navien or Rinnai and are serviced on the same annual descale schedule. A tankless installation runs $3,500–$6,500 depending on gas, venting and condensate work.
What goes wrong on Bosch equipment
Inverter drive and outdoor control board faults
The system stops, restarts, or refuses to run and posts a code on the outdoor board. Inverter faults are frequently downstream of something else — low charge, a failing outdoor fan, high head pressure from a filthy coil — so replacing the board first is an expensive way to be wrong. Proper diagnosis reads the stored fault history and the operating data before anyone quotes a part; a control board replacement is $400–$800.
Low charge from a reused line set
Retrofits often reuse the copper already running through the wall, and that is fine when it is the right size, pressure-tested and either flushed or replaced where it carried older refrigerant and oil. When it is not, you get a slow leak, poor heating capacity in February, and an inverter compressor running at high demand to make up the difference. Leak repair and recharge runs $300–$800, and on a retrofit we would rather deal with the line set at install time than come back for this.
Icing and drainage at the outdoor unit
Heat pumps run all winter, defrost regularly, and shed a lot of water in the process. A unit sitting flat on grade in a Tyandaga backyard, below the drift line and over soil that does not drain, will build an ice collar around its base. The fix is elevation on a proper stand with clear drainage beneath — cheap when done at installation, awkward and expensive to correct in January.
Scale and condensate faults on Greentherm tankless units
The same two failure paths as every condensing tankless: limescale in the heat exchanger and a blocked or neglected condensate path. A descale flush is $150–$300 and should be annual on our water. Skipping it does not save money; it moves the money to a larger repair later.
Bosch warranty: what to know
- Bosch coverage on this equipment steps up when you register the product, and the registration window is short — do it within the period stated on the warranty document, using the model and serial from the data plate, rather than assuming your installer did it for you.
- Compressor coverage and general parts coverage are different lengths on heat pumps, and on the tankless line the heat exchanger term is longer than the parts term. Because Bosch has revised these terms across product generations, the certificate that came with your unit is the authority — we read it with you rather than quoting a number from memory.
- Labour is not covered beyond the short initial period included with the equipment. A warranty part in year four still means a paid diagnostic and paid labour.
- Professional installation to the manual is a condition of coverage: correct line-set sizing, a pressure test and evacuation, verified charge, and — for tankless — approved venting and condensate handling. Refrigerant lost to a poor flare or braze is not a warranty item.
- Documented annual maintenance protects a claim. Coil cleaning, filter changes and a descale record cost far less than arguing with a manufacturer about whether neglect caused a failure.
Parts availability in the GTA
Bosch parts come through the manufacturer's own Canadian distribution rather than being deep stock at every wholesale counter, which makes lead time a real planning item on this brand. Sensors, fan motors, contactors, condensate components and descale supplies are quick to get; inverter drives, outdoor control boards and compressors are model-specific and can take days. That is a manageable risk on a dual-fuel system, because the gas furnace keeps the house warm while a heat pump part is in transit, and it is a much bigger deal on an all-electric setup — which is exactly why we ask about backup heat before we order anything in winter. We give you the quoted lead time in writing, and if it changes we tell you rather than letting you wonder.
Bosch Tankless Error Codes Explained — what each one means and whether it is safe to keep running.
Common questions
Can a Bosch heat pump replace just my air conditioner and keep my furnace?
Yes, and for many Halton houses that is the most sensible version of the project. The heat pump takes the place of the outdoor condenser and provides heating as well as cooling, while your existing gas furnace stays as backup for the coldest stretches. The two need to be set up to hand off cleanly, which is a commissioning task rather than a wiring afterthought.
Do heat pumps actually work through a Burlington winter?
Cold-climate models keep producing heat well below freezing, but their capacity falls as the temperature drops, which is why sizing and a sensible backup strategy matter more than the brochure rating. Our honest local answer is in cold-climate heat pumps in Toronto and the GTA, and pricing is broken out in how much a heat pump costs in Ontario.
Are Bosch heat pumps eligible for Ontario rebates?
Eligibility depends on the specific model and configuration appearing on the current Home Renovation Savings Program list, not on the brand name. That is the Enbridge and Save on Energy program that replaced the older Ontario offers, and its qualifying-product list is updated on its own schedule — so we check your exact model and tonnage against it before you sign, and we file the paperwork. Current Ontario rebates run $500–$7,500 depending on the system; the Ontario rebate hub sets out which programs are open.
Do you service Bosch Greentherm tankless water heaters?
Yes — descaling, condensate and neutralizer service, venting corrections, sensor and fan replacements, and full replacement when a unit has reached the end. Send us the model and serial off the side of the cabinet when you book and we can usually tell you what a repair will involve before we arrive.
Who can service an inverter heat pump?
Any refrigeration-licensed technician with the right gauges, a scale, a vacuum pump and the tooling for the refrigerant in your system — and with A2L equipment that tooling is not optional. Ask a contractor directly whether they are equipped for the refrigerant your unit uses. You can reach our shop through the contact page.