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Centralized hot air heating and condensing boiler and water heater

Solution suitable for three-storey office buildings or higher

The solution

The building is divided into two main areas: the perimeter and a central, open plan area. A centralized H-shaped system ventilates warm air. Warm air heating provides comfort for the entire central area and a hot water loop heats the perimeter. In the H-shaped system, a condensing boiler provides warmth via coils.

A second condensing boiler heats the perimeter, while the H system ventilation system gath-ers fresh outside air, returned air and warm or cooled air into a single distribution point.

Home hot water is centrally produced by a condensing water heater or a hot water loop. There's a growing demand for safer entryways in winter (indoor parking ramp, sidewalks) and a condensing boiler combined with heated concrete slabs can do the job.

Optimal solution set-up

1- «H» ventilation system

  • Operation and installation ease

2- Condensing boiler for the «H» ventilation system

3- Radiators

4- Condensing water heater

5- Condensing boiler for the perimeter heating

6- Condensing boiler for the entrance

  • The condensing boiler and water heater attain very high levels of efficiency

Many benefits for you and your customers

For you

  • Recognized technology
  • Easy to install
  • High-efficiency equipment
  • Facilitates LEED certification

For your customers

  • Financial grants
  • Increased comfort
  • Competitive operating costs
  • Heat recovery potential

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 determine the amount to which you are entitled.
Commercial grants

Other options are also possible

These are the solutions we suggest, but many other options are also possible. Talk to

your sales representative—they'll advise you of the best options to meet your energy 


1 800 587-1313    Write us

Equipment rental

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

Learn more (PDF in French)