Reverse Osmosis
Water Filter
Worried about the quality of your drinking water? A reverse osmosis water filter from Dunn Heating and Air Conditioning delivers the high-level purification your family deserves. These advanced systems eliminate up to 99% of impurities, including chlorine, lead, and other contaminants commonly found in tap water. Our reverse osmosis water filtration units provide pure, great-tasting water straight from a dedicated faucet in your kitchen.
With decades of experience assisting homeowners in the Waterloo region, our licensed technicians install and service reverse osmosis drinking water systems that offer confidence with every glass you pour. Don’t settle for anything less when it comes to your water—connect with Dunn Heating and Air Conditioning and experience how affordable it is to have cleaner, safer water in your home.

How We Install a Reverse Osmosis Water Filtration System
1
We begin by evaluating your home’s water quality, daily consumption, and available space to suggest the most suitable reverse osmosis drinking water system. Based on our assessment, we’ll recommend the right system size and configuration to match your household’s needs.
2
Our team carefully prepares the installation area under your sink, making sure there’s enough space and safeguarding your cabinetry. We securely connect the reverse osmosis water filtration system to your cold water line using premium fittings that ensure leak-free performance and proper water pressure.
3
We mount a separate drinking water faucet on your sink or countertop, drilling carefully to maintain the appearance of your surfaces. We also set up the drain line that carries away contaminants captured by the reverse osmosis system.
4
After installation, we flush the system to eliminate any residual materials and ready it for everyday use. We perform a complete system test to ensure flawless operation, check for leaks, and confirm water quality standards are met.
5
Before finishing, we’ll show you how to use and maintain your new system, including instructions on filter replacement to help keep it running at its best.
Why Choose Dunn Heating and Air Conditioning for Your Reverse Osmosis Drinking Water System?
Rapid Response Service
If you’re facing concerns about your water quality, Dunn Heating and Air Conditioning acts fast. We guarantee that a technician will be dispatched the same day of your call, so you won’t be waiting days for cleaner, safer water. Many competitors schedule installations weeks later, but our quick service keeps your household protected without delay.
Expert Installation in a Single Visit
Our service vehicles are fully stocked with high-grade reverse osmosis water filter components and specialized equipment. Most installations are completed within 2–3 hours, avoiding the need for return visits or parts delays. Your reverse osmosis drinking water system will be operational the same day you call.
Certified Water Quality Specialists
All Dunn Heating and Air Conditioning technicians are certified in water treatment and reverse osmosis technologies. Their expertise ensures your reverse osmosis water filtration system is installed according to manufacturer guidelines and local plumbing regulations.
Contact Dunn Heating and Air Conditioning for Your Reverse Osmosis Water Filter
Stop worrying about what’s coming out of your tap. Call Dunn Heating and Air Conditioning today to book your same-day reverse osmosis water filter installation.

FAQS About Reverse Osmosis Water Filter Systems
What is a Reverse Osmosis Water Filter?
A reverse osmosis water filter is a sophisticated purification system that removes contaminants at the molecular level. Unlike simple carbon filters, reverse osmosis water filtration systems push water through a semi-permeable membrane that blocks impurities while letting pure water molecules through. Each system uses multiple filtration stages—starting with pre-filters that eliminate sediment and chlorine, followed by the main reverse osmosis membrane, and a final post-filter for polishing. The result is exceptionally clean drinking water, free from lead, arsenic, fluoride, pesticides, and other substances that typical filters often miss.
How Does a Reverse Osmosis Water Filter Work?
- A reverse osmosis water filter uses a detailed multi-stage process beginning when tap water enters the system.
- First, pre-filters trap larger particles, sediments, and chlorine that could harm the sensitive membrane.
- Then, water is pushed under pressure against the semi-permeable membrane, which blocks contaminants while allowing water molecules to pass through, flushing impurities to the drain.
- Purified water is stored in a tank until you need it.
When you open your dedicated faucet, the water passes through a final polishing filter to enhance taste and smell before reaching your glass.
This thorough process ensures your water is up to 99% free of dissolved solids, heavy metals, microorganisms, and other pollutants.
What Size Reverse Osmosis Water Filter Do I Need?
Choosing the right size reverse osmosis water filter depends on the number of people in your home and your daily water needs. Smaller households (1–3 people) typically require a system that produces about 50 gallons per day. Mid-sized families (4–6 people) usually need systems capable of 75–100 gallons daily, while larger households or homes with greater water demands may need commercial-grade systems producing over 150 gallons per day.
During your consultation, Dunn Heating and Air Conditioning technicians will recommend a system that matches your usage needs without causing unnecessary waste or overspending on capacity you won’t use.
What are the Benefits of Reverse Osmosis Water Filters from Dunn Heating and Air Conditioning?
Reverse osmosis water filters from Dunn Heating and Air Conditioning eliminate up to 99% of contaminants like lead, arsenic, fluoride, chlorine, and more—substances that municipal water treatment can leave behind. This filtration improves taste noticeably, enhancing the flavour of beverages and cooking while getting rid of unpleasant odours.
Our reverse osmosis water filtration systems also help families save money by significantly reducing the need for bottled water, often paying for themselves within 12 to 18 months.
Dunn Heating and Air Conditioning offers systems with compact designs to maximize under-sink storage and dedicated faucets for easy access to purified water. Each system features automatic shut-off valves to prevent water waste and extend the life of your filters, along with simple cartridge changes that make ongoing maintenance effortless.