How much does a pool cover heater blanket save in gas costs during Ottawa's cool June nights?

A quality solar pool cover (also called a solar blanket) can reduce your gas heating costs by 50 to 70 percent during Ottawa's cool June nights, translating to savings of $150 to $400 per month depending on your pool size and how often you heat. The cover works by preventing heat loss through evaporation, which accounts for roughly 70 percent of pool heat loss overnight when temperatures drop to 8-12°C as they often do in early June.

Ottawa's June weather is notoriously unpredictable — daytime temperatures might reach a pleasant 24°C, but nighttime lows frequently dip into single digits, especially during the first two weeks of June. Without a cover, your pool can lose 2 to 4 degrees overnight, meaning your gas heater has to work constantly to maintain comfortable swimming temperatures of 26-28°C. A solar cover acts as an insulating barrier, typically reducing overnight heat loss by 60 to 80 percent while also adding 3 to 5 degrees of solar gain during sunny days.

For a typical 14x28 foot pool in Ottawa, expect to burn $200 to $600 worth of natural gas per month in June if you maintain 27°C water temperature without a cover. With a quality 12-mil solar cover properly fitted and used consistently, those costs drop to $80 to $180 per month. The key is discipline — the cover must go on every single night and during cool, cloudy days to maximize savings. Many Ottawa pool owners find June is actually their highest heating month because they want to start swimming as soon as possible, but the nights are still quite cool.

Important considerations: A solar cover only works if you use it religiously, and handling a large cover daily can become tedious without a reel system ($300 to $800). The cover also needs to be removed completely during pool parties or when you want full access for cleaning. Solar covers typically last 3 to 5 years in Ottawa's UV-intense summers before becoming brittle and needing replacement ($200 to $500 for a quality cover). Never leave a solar cover on during thunderstorms or high winds — it can become a dangerous projectile.

If you're planning a new pool installation or considering heating options, browsing pool contractors through the Ottawa Construction Network directory can help you find professionals who understand the specific challenges of maintaining comfortable water temperatures during Ottawa's variable spring and fall weather.