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Tankless Water Heater Installation

Tankless Water Heater Installation in Ontario

Endless Hot Water From $3,300

A Rinnai tankless water heater means hot water that never runs out and no rental fees. EHI installs the RX160iN and RX199iN across Ontario from $3,300.

  • Rinnai RX160iN and RX199iN, 0.97 and 0.98 UEF condensing
  • Endless hot water, sized for Ontario's cold winter inlet water
  • From $3,300 installed, guaranteed quote, 0% financing
  • TSSA-certified gas technicians, natural gas or propane

Voted Best Company 2019 to 2021 · Authorized Midea, Lennox, Kepler & Rinnai dealer, plus Goodman · 20+ years

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Our Brand Partners

  • Midea
  • Lennox
  • Kepler
  • Rinnai
  • Goodman

Problems a tankless water heater solves

If your hot water tank is the reason for a family argument before 8 am, read on.

  • Running out of hot water

    A 40 or 50 gallon tank has a hard limit, and a family of four finds it by 7:30 am. A tankless unit heats on demand at up to 9 or 11.1 GPM, so the hot water lasts as long as the fixtures run.

  • Paying rental fees forever

    A rented tank can cost you more over fifteen years than buying a tankless outright. We size and install a Rinnai you own, and we can help arrange the return of the rental unit.

  • The old tank is leaking or rusting at the base

    A leaking tank is a flood waiting for a long weekend. A wall-mounted tankless has no tank to rust through, and we can usually replace a failing tank with a tankless in one visit.

  • Slow recovery after a bath or the laundry

    Tanks need time to reheat. On-demand heating has no recovery time, so the dishwasher, shower and washing machine can follow each other without a wait.

  • The tank hogs the furnace room

    A Rinnai tankless mounts on the wall in roughly the space of a carry-on suitcase. That's floor space back in the basement.

  • High gas bills from standby heat loss

    A tank reheats itself around the clock whether you use it or not. A condensing tankless at 0.97 to 0.98 UEF only burns gas when a tap opens.

  • 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.

Rinnai tankless water heaters we install

We're an authorized Rinnai dealer. Two condensing models cover almost every Ontario home.

Rinnai RX160iN

0.97 UEF condensing, up to about 9 GPM, natural gas or propane. The right fit for most homes with two bathrooms, covering two showers at once in an Ontario winter.

More on Rinnai RX160iN

Rinnai RX199iN

0.98 UEF condensing, up to about 11.1 GPM, natural gas or propane. For three-plus bathrooms, soaker tubs, or households that run several hot fixtures at once.

More on Rinnai RX199iN

Add a recirculation option

Hot water at the far bathroom in seconds instead of running the tap for a minute. Ask us about recirculation when we size your system.

Ask about recirculation

Not sure which option fits your home?

Tell us about your house and we'll recommend the right system, with a guaranteed price and your rebate estimate.

Sizing a tankless for Ontario groundwater

Tankless sizing is about temperature rise, and that's where Ontario is different from the brochure. Incoming water in a Southern Ontario winter can drop into the single digits Celsius, and well water up north runs colder still. To deliver a 49°C shower from 5°C water, the heater has to raise the temperature by about 44°C, and a tankless unit's flow rate falls as the required rise climbs. The GPM number on the box is a best-case figure at a small rise.

So we size by what you'll actually run at once in February: a shower uses roughly 2 to 2.5 GPM, a kitchen tap about 1.5, a washing machine about 2. Two showers and a dishwasher at the same time is a job for the RX199iN; one shower and a tap is fine on the RX160iN. We count your fixtures, check your winter inlet temperature, and pick the model that still delivers when it's -20°C outside, not just in July.

Hot water running at a bathroom sink
Image: Rinnai

What's included in an EHI tankless water heater installation

  • Fixture count and winter inlet temperature sizing, with a guaranteed quote before we start
  • Removal of the old tank and help returning a rental unit
  • Gas line sized for the new burner. A 199,000 BTU unit pulls far more gas than a tank did, so line and meter capacity are checked, and upsized where needed, by TSSA-certified gas technicians
  • Direct-vent PVC or polypropylene venting to the outdoors, sized and terminated to Rinnai and code requirements
  • Condensate drain with a neutralizer cartridge, because condensing units produce acidic condensate that can damage drains
  • Isolation valves and service ports so the annual descaling flush takes minutes
  • 120V power, water connections and a pressure relief valve to code
  • Start-up, temperature set, warranty registration and a walk-through of the controls
Rinnai RX tankless water heater mounted on a garage wall
Image: Rinnai

Tankless water heater cost in Ontario

Installed pricing depends on the model, venting route, gas line work and whether you add recirculation. Your quote is guaranteed.

OptionBest forInstalled from
Rinnai RX160iN condensingMost two-bathroom homes$3,300
Rinnai RX199iN condensingThree-plus bathrooms, high demandQuote
Propane set-upHomes outside the gas gridQuote
Recirculation optionLong pipe runs, far bathroomsQuote
Gas line upsizingHomes where the existing line can't feed the burnerQuote

0% financing for 3, 6 or 9 months, or open loans from 2.99% on approved credit. Rinnai extended coverage may be available depending on package.

How tankless water heater installation works

  1. 1

    Assessment

    We count fixtures, check the gas line and meter, walk the venting route, and ask about water hardness. In-home or virtual, your choice.

  2. 2

    Guaranteed quote

    Model, venting, gas work and any recirculation option on one written quote. The number on the quote is the number on the invoice.

  3. 3

    Install day

    Usually one day, old tank out and Rinnai in. TSSA-certified gas technicians handle the gas and venting.

  4. 4

    Start-up and hand over

    We set the temperature, show you the controls and the isolation valves, and register your Rinnai warranty.

What it costs, and how we keep it lower

  • Guaranteed pricing

    Your quote is your final price. No surprise extras on the agreed scope of work.

  • 0% financing

    Interest-free for 3, 6 or 9 months, or open loans from 2.99% on approved credit.

  • Rinnai warranty registered

    We register the factory warranty for you. Rinnai extended coverage may be available depending on package.

  • Price match

    We may beat comparable reputable quotes by up to 10% where applicable. See current offers.

  • Want the real number for your home?

    A guaranteed quote takes one visit. Rebate and financing options come with it.

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.

Serving Ontario from our Stouffville office

Find us on Google, get directions, or check our hours. Our crews travel to your home or business across the province.

EHI Heating And Cooling (Efficient Home Improvements)

4.5 on Google · Read reviews · Write a review

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 outside these hours.

  • Office
    4261 Bloomington Road, Whitchurch-Stouffville, ON L4A 3Y6

Frequently asked questions

How much does a tankless water heater cost installed in Ontario?

Tankless water heater installation with EHI starts at $3,300 installed for a Rinnai RX160iN. The RX199iN, propane set-ups, gas line upsizing and recirculation add to that, and installed pricing depends on size and installation requirements. We give a guaranteed quote before any work, and 0% financing is available.

What size tankless water heater do I need?

Size depends on how many hot fixtures run at once and how cold your incoming water gets in winter. For most Ontario homes with two bathrooms the Rinnai RX160iN at up to about 9 GPM is enough; homes with three or more bathrooms, or a soaker tub, usually need the RX199iN at up to about 11.1 GPM.

Does a tankless water heater really give endless hot water?

Yes, within its flow rate. A tankless unit heats water as it passes through, so a single shower can run as long as you like. Run more fixtures than it is sized for at once and the flow or temperature drops, which is why sizing for winter inlet water matters.

Can a tankless water heater run on propane?

Yes. The Rinnai RX160iN and RX199iN are available for natural gas or propane, so homes outside the Enbridge gas grid can have the same endless hot water. Our TSSA-certified technicians handle the gas connection either way.

Does a tankless water heater need a special vent or gas line?

Usually both. Condensing Rinnai units vent through PVC or polypropylene pipe to the outdoors rather than the old chimney, and a 160,000 to 199,000 BTU burner often needs a larger gas line than a tank used. We check the venting route and gas capacity on the assessment and include any changes in the guaranteed quote.

Is a tankless water heater worth it in Ontario?

For most households, yes, especially if you are paying tank rental fees or running out of hot water. A condensing Rinnai at 0.97 to 0.98 UEF has no standby heat loss, lasts longer than a tank with annual maintenance, and frees up floor space. Homes with very hard water should plan on an annual flush to keep it that way.

How long does tankless water heater installation take?

Most tankless water heater installations are finished in one day, including removing the old tank. Jobs that need a new gas line run or a long venting route can take a bit longer, and we tell you that in the quote.

Ready for a guaranteed quote?

Home or business, tell us what's going on with your heating, cooling or hot water. We'll size it right, price it once, and show you every rebate you qualify for.

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