1. The Winston Works Inc.

  2. Winston MacKelvie

  3. winstonworks@me.com

  4. P: 1-450-243-6850

  5. C: 1-514-770-0162

  6. L’´Equipe Winston francais.htm


On-site Energy Storage for Everyone Saves Money, Energy, and the Environment


    Waste heat recovery and reuse


Reusing heat recovered in homes and buildings reduces carbon emissions, global warming, pollution, smog, peak-power demand, and transmission losses. It also boosts adoption of solar/wind power and saves everyone money. All at the same time!


Drainergy and HeatBank are special-purpose heat exchangers that recover normally wasted heat and reuse it to pre-heat the fresh cold water for water heaters. Heating cold water to hot water is a big deal because it is used by everyone every day, in every building, everywhere, for ever.


Their high performance (cost vs energy savings) comes from a design having fast heat transfer where all the copper is in high pressure thermal contact and the water flow is turbulent with negligible pressure drop. Their simplicity of manufacture and assembly (no solder, brazing or fasteners), and having all non-thermal components in available plastic shapes, make for low capital investment and their low cost. They are non-powered, maintenance free and long lived.


Drainergy plumbs in-line with an existing vertical or horizontal drainpipe from a single sink to a whole building. It works when fresh cold water and hot drainwater are both flowing through it at the same time, as when showering or running a sink.


HeatBank is a breakthrough invention because it stores heat energy in a water tank connected to the water heater. It has a special Drainergy inside that heats using waste heat not just from showers and sinks but also from dish and clothes washers and dryers, tubs, heat pumps, ventilators, refrigerators and exhaust flues. This is possible because heat transfer is one-way only which means that, critically, cold drainwater won’t cool the tank.


The big deal about heating cold water comes from the fact that In any one time zone, like traffic, we mostly use hot water in the early morning, noon, and night. The longer it takes for the new cold water to get ‘hot’ the more heaters in the zone are ‘on’ all together.


This drives peak power demand (some 50 percent of cost), and releases huge volumes of hot, moist, acidic exhaust that creates city smog adding to health costs. In addition enormous volumes of hot drainwater heat land, rivers and lakes to detrimental effect. Because pre-heated water from Drainergy and HeatBank gets hot faster, fewer heaters are ‘on’ together which reduces all these unwanted effects. In addition, solar and battery with limited and discontinuous power, are made more attractive with widespread energy storage that reduces peak power demand.


As for market potential, Manitoba and Ontario now mandate heat recovery from showers in all new homes.

updated Oct 2017

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