The solution

This solution is one of the most effective, innovative designs in recent years for 50-unit or more buildings. It’s effective because a centrally located condensing boiler, combined with a mixed water loop, warms each dwelling via a heat pump. A centralized condensing water heater—which maximizes the floor space of each dwelling—ensures the flow of hot water. And it’s innovative because it pairs natural gas with a heat pump to get the best of both worlds! The result lives up to expectations.

Optimal solution set-up

1- Heat pump
  • Connected to a water tower and a boiler—warms and cools air in each unit. 

2- Condensing water heater

  • Reuses latent heat energy—a high-efficiency appliance. 

3- Condensing boiler
  • A more compact appliance—facilitates integration into mechanical rooms.

Many benefits for you and your customers

For you
  • Innovative concept
  • Ideal architectural integration—appliances share a mechanical room
  • No chimney required
  • Grants to reduce investment costs and quickly increase project profitability
For your customers
  • Increased design freedom
  • Energy savings of up to 30% compared to heating each unit individually

Grants available

Énergir offers substantial grants to smoothly integrate natural gas into your project. Financial assistance is available from energy-efficiency programs and the consumption rebate program. Your sales representative will help you to determine the amount to which you are entitled.

Residential grants for 4-unit or more buildings with centralized installation

Equipment rental

Gaz Métro Plus, a subsidiary ofÉnergir, has a great equipment rental program for your construction projects.

Learn more (PDF in French)


To keep equipment in top working order for years to come, experts recommend regular maintenance with a Gaz Métro Plus service plan or an Énergir Authorized Partner.