Combi Water Heaters: Space & Water Heating in One System
- Superior Care Home Services
- Mar 6
- 3 min read
Homeowners looking for an efficient and space-saving way to heat both their home and water supply should consider a combi water heater. This all-in-one system is an excellent choice for modern homes in Ontario, especially for those looking to enhance efficiency while reducing energy costs. Let’s explore how combi water tanks work, their benefits, and what you should know before making a purchase.
What is a Combi Water Heater?
A combi water heater, or combination boiler, provides both space heating and domestic hot water from a single unit. Unlike traditional systems that require a separate water heater and furnace, a combi water tank efficiently supplies on-demand hot water while also powering your home's heating system.
These systems use a high-efficiency heat exchanger to heat water instantly when needed. When you turn on a hot water tap, cold water enters the unit and is rapidly heated by the boiler. When space heating is required, a diverter valve directs heated water to the home's radiators or in-floor heating system.
Benefits of a Combi Water Heater
1. Saves Space
A combi water heater eliminates the need for a separate hot water tank and furnace, making it perfect for homes with limited space.
2. Lower Energy Costs
With an impressive 95% AFUE (Annual Fuel Utilization Efficiency) rating, combi water tanks use less energy, translating to lower utility bills. Many models are ENERGY STAR® certified for added savings.
3. On-Demand Hot Water
Unlike traditional water heaters that store hot water in a tank, combi water heaters heat water as needed. This ensures a continuous hot water supply without running out.
4. Efficient Space Heating
Offering up to 74% more heating capacity than standard combination boilers, these systems provide reliable and even heating throughout your home.
5. Easy Maintenance
Fewer components mean less maintenance compared to separate heating and water heating systems.
Things to Consider When Choosing a Combi Boiler
While combi water heaters offer many advantages, they are not suitable for every home. Here are some key factors to keep in mind:
Household Hot Water Demand – Larger households with multiple simultaneous hot water users may experience a drop in water pressure.
Sizing – Choosing the right size is crucial. An undersized unit will struggle to meet demand, while an oversized unit may waste energy.
Cold Climate Performance – In extremely cold temperatures, combi water tanks may need additional support to maintain efficiency.
Frequently Asked Questions
What is the downside of a combi boiler?
While combi water heaters are efficient, they may struggle to supply hot water to multiple outlets simultaneously, making them less ideal for large households.
Is a combi boiler cheaper to run than a hot water tank?
What is the difference between a combi boiler and a tankless water heater?
Do I need a cold water tank if I have a combi boiler?
Get a Combi Boiler for your Home
Superior Care offers a large selection of combi boiler , coupled with experienced technicians to install and service the water heater.
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