A tankless system is extremely efficient and relies on its advanced heat exchangers to heat up water nearly instantly.

The buildup of scale is increased with heat and thus the inside of a tankless heat exchanger will accumulate an efficiency reducing “blanket” over time. To combat this problem a tankless is usually (always by a reputable company) installed with flush valves, which isolates your homes water pipes yet allows vinegar to be pushed through the system in turn dissolving the build up and returning the tankless to its original efficiency. This process takes roughly an hour. If you live in Ontario we offer a tankless flushing service.



There is really no way to descale a conventional storage type tank water heater, those systems simple become increasingly less efficient over time.

Hard Water Causes Inefficiency

Below is an extensive list of Ontario cities and the corresponding water hardness that is present in the water supply. The higher the number of grains the harder your water is, this in turn produces more scale and deposits in your water heater, on shower heads, around faucets etc. A conventional water heater will become much less efficient with time in a hard water situation; in which case I would recommend a tankless that can be cleaned with a vinegar solution, restoring efficiency.

Quick Hard Water Exercise:

Lookup your city and see if you have hard water Think about how old that 40 gallon hot water tank is in your house Know that on average at 7.5 grains of hard water a regular tank loses 2% efficiency a year to due scale build up That 2% doubles to 4% at 15 grains and so on….. After you do the math a tankless that is able to be cleaned of all scale becomes very economical Don’t have a tankless? [formlightbox title=”” text=” Get a free quote on one from us”]

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City Hardness (grains) Population Almonte 17.5 2805 Amhurstburg 6.5 6060 Ancaster 19 6718 Arnprior 12.2 8663 Aurora 17 see Newmarket Azilda 12 1403 Barrie 9.5 41990 Beamsville 15.6 3864 Belleville 6 34391 Bracebridge 2 5304 Brampton 24.2 58571 Brantford 24 42053 Brockville 7.5 11302 Burks Falls 10 1200 Burlington 9 47562 Carleton Place 5.5 4956 Cayuga 120 905 Chatham 13 19874 Cippawa 8.6 N/A Clifford 15 660 Clinton 13.2 2136 Cobalt 4 461 Cobourg 7.5 7234 Cochrane 18 2474 Collingwood 4.5 9632 Copper Cliff 2 N/A Cornwall 7 19290 Craigment 4 N/A Delhi 18 2819 Deseronto 8.4 1314 Dryden 3.5 5900 Dundas 17 10320 Dunnville 21 3830 Elmira 29 390 Essex 33.4 3658 Etobicoke 8 109153 Fonthill 15.6 2495 Fort Williams 1 N/A Galt 22 930 Gannonoque 7 3759 Goderich 5.5 4808 Grimsby 8 6821 Guelph 22 30652 Hagersville 30 2055 Haileybury 2 1243 Hamilton 7.5 147943 Harrow 49.8 3112 Hanover 13 3915 Hawkesbury 2 5300 Hespeler 26 550 Ingersoll 24.4 4269 Iroquois Falls 4.5 2005 Islington 16.2 20137 Kapuskasing 6 3490 Kemptville 16.4 6130 Kenora 4 9929 Kingston 7.5 37776 Kirkland Lake 3 4712 Kitchener 40 87480 Lansing 21 N/A Leamington 14 17253 Lindsay 8.5 27220 Listowel 13 9907 London 25 149133 Lucan 13 N/A Lucknow 16.4 977 Meaford 12 2978 Merritton 8.5 N/A Midland 8 16268 Mitchell 16.2 1907 Matawa 5 Mount Forest 25 2937 New Liskeard 16 3306 Newmarket 10.5 53915 New Toronto 8 see Toronto Niagara Falls 8 29250 North Bay 1 24960 North York Twsp. 18 173099 Norwick 14 1220 Oakville 7 34364 Orillia 10 19999 Oshawa 7.5 38796 Ottawa 3 181258 Owen Sound 15 20688 Paisley 19.5 829 Paris 20 2984 Parkhill 14 1145 Parry Sound 4 3020 Pembroke 2 15357 Penetanguishene 7.5 see Midland Perth 4 5596 Peterborough 5 40913 Picton 7 2265 Port Arthur 6 N/A Port Colborne 7 6291 Port Dover 13.2 N/A Port Elgin 38.4 1852 Port Hope 7.5 5553 Prescott 7 3553 Preston 17 620 Renfrew 2.5 12221 Richmond Hill 17.2 72717 St. Catharines 7 40750 St. Mary’s 22.8 1475 St. Thomas 11.5 29300 Sarnia 7 38869 Sault Ste. Marie 3 29847 Scarborough 8.5 155061 Seaforth 17.5 1496 Shelburne 12 N/A Simcoe 12 16900 Smith Falls 5 6904 Stratford 30 14604 Strathroy 17.5 5543 Sturgeon Falls 2 3134 Sudbury 2.5 53168 Tavistock 30.4 1893 Tecumseh 7.8 5953 Teeswater 32 616 Thorold 8 5848 Tillsonburg 12 8925 Timmins 2 19055 Toronto 7.5 319202 Trenton 14 6120 Twin Province 17.5 N/A Uxbridge 15.4 3533 Walkerton 8.8 2651 Wallaceburg 6.5 5822 Waterloo 28 see Kitchener Welland 8 19258 Weston 10 9448 Whitby 7.5 19750 Windsor 6 72436 Woodbridge 16.2 11770 Woodroffe 22.5 N/A Woodstock 2.5 26041

It’s always a good idea to have your water tested to determine not only water quality but water hardness and this list should be considered just a rough guide.