Understanding Condominium HVAC Water Treatment
Water covers 71% of our Earth ’ s surface, but did you know that only 10% of that water is drinkable, and in short supply? Water is the Earth ’ s most valuable natural resource, and a necessary component of our survival as a species. In the modern world, improving our savings and sustainability of water is more imperative than ever. As water treatment professionals, one of the main methods we use to reduce operating costs and improve water sustainability is by keeping HVAC (Heating, ventilation, and air conditioning) heat transfer equipment water systems clean.
The water used in most HVAC systems, like the water we drink, comes from ground sources (wells and aquifers) or surface sources (lakes and bodies of water). Depending on the source and quality of the water, calcium, magnesium, and other impurities in the water can precipitate and adhere to HVAC heat transfer surfaces. These deposits create an insulating barrier decreasing the ability for heat to transfer, resulting in significantly higher energy costs.
Andrew Megens, CSP , is a water treatment professional with Jutzi Water Technologies that specializes in providing water treatment solutions to improve performance, increase sustainability, reducing operating costs, and extend HVAC equipment life. Jutzi Water Technologies office is location in Stratford, ON, and provide water treatment products and services across Ontario.
As an analogy, think of your household tea kettle. At the bottom of the kettle is an electric heating element used to boil the water. As the lifespan of the kettles goes by, the water will take longer to boil, as a white calcium scale residue forms at the bottom of the heating element, preventing efficient and fast boiling.
In certain high - rise condominium buildings, equipment such as chillers , heat exchangers, or heat pump systems with cooling towers may be used to provide air conditioning. This
equipment is used to remove heat from the chilled water through a process of evaporation. The inefficiencies of mineral deposit buildup can not be underestimated - 1/8 th of an inch of calcium scale formation on the heat transfer equipment will result in up to a 25% increase in energy costs to run the HVAC equipment. When examining the big picture, water treatment costs to prevent mineral deposits and corrosion are minimal compared to the increased costs of heat transfer equipment as a result of these inefficiencies. Another simple recommendation for condominium owners, directors, and managers, is to regularly inspect faucets, toilets, and HVAC water systems for leaks, and to have any issues repaired promptly, as any damage can drastically increase water costs. The costs of broken and/or leaky equipment can be drastic. A faucet with a common leak of 1 drip per second equates to 65L of wasted water per day, and 23,725L per year - damaging not only to the environment but one ’ s wallet as well. Furthermore, a simple toilet with a broken float results in hundreds of dollars in surplus monthly water costs. The HVAC water systems and water treatment programs are set up to reuse and recycle water as much as possible, reducing costs and waste, especially when compared to scaling up heat transfer surfaces to accommodate the mineral deposit inefficiencies.
Another simple recommendation for condominium owners, directors, and managers, is to regularly inspect faucets, toilets, and HVAC water systems for leaks, and to have
CCI Review 2022/2023 — 1
August 2022 - 26
Made with FlippingBook flipbook maker