Install a drain water heat recovery unit and receive up to $400 By installing a drain water heat recovery unit1, you could save up to 40 % on your costs for water heating.

How it works Water from showers contains a significant amount of energy that goes directly down the drain. Installing a drain water heat recovery system means you can recycle some of that energy. Wastewater from the shower flows down the inner wall of the copper pipe and preheats the fresh water from the water supply system which is simultaneously ascending through the coiled copper tubes. The preheated fresh water will therefore be warmer when it enters the water heater, and subsequently when it is sent to the shower.

How the drain water heat recovery system works

Advantages

• The water heater uses less energy for heating water to the desired temperature;
• The water heater supplies hot water longer;
• The system requires no maintenance and has a service life of 30-50 years.

Financial assistance from the Energy Efficiency Fund²

The financial assistance is paid based on the efficiency of the unit installed:

• $250: unit with an efficiency rating of 30-42%
  Close

  Power-Pipe R2-36 Power-Pipe R2-42 Power-Pipe R2-48 Power-Pipe R2-54 Power-Pipe R3-30 Power-Pipe R3-36 Power-Pipe R4-24 Power-Pipe R4-30	Eco-GFX S3-40-2 Eco-GFX 2340-B
  If your unit is not on the list, contact the EEF.

• $400: unit with an efficiency rating over 42%
  Close

  Power-Pipe R2-60 Power-Pipe R2-66 Power-Pipe R2-72 Power-Pipe R2-84 Power-Pipe R2-120 Power-Pipe R3-42 Power-Pipe R3-48 Power-Pipe R3-54 Power-Pipe R3-60 Power-Pipe R3-66 Power-Pipe R3-72 Power-Pipe R3-120 Power-Pipe R4-36 Power-Pipe R4-42 Power-Pipe R4-48 Power-Pipe R4-54 Power-Pipe R4-60 Power-Pipe R4-66 Power-Pipe R4-72 Power-Pipe R4-120	Eco-GFX S3-60-2 Eco-GFX S4-40-2 Eco-GFX S4-60-2 Eco-GFX G3-40-1 Eco-GFX G3-60-1 ThermoDrain TD340 Eco-GFX 1360-A Eco-GFX 2360-B Eco-GFX 2440-B Eco-GFX 2460-B
  If your unit is not on the list, contact the EEF.

Savings

The greater the simultaneous use of hot water, the greater the savings. Consult the energy savings simulation tool to calculate the potential savings.

Examples of annual savings

Number of showers/day	Average duration of shower	Annual savings
4	8 minutes	$134
6	9 minutes	$227
8	10 minutes	$337

* Example for a mixed connection with a standard water heater in Montréal.
The unit is the same in the three examples and the price of the natural gas is $0.59/m³

Where to find a heat recovery unit

You can now purchase a drain water heat recovery system in some Rona and Réno-Dépôt stores, Home Depot or Le Centre du foyer Sears, or you can contact your plumber or contractor.

Plumbers and contractors can purchase a drain water heat recovery system from a distributor of their choice: Master, Emco, Wolseley, Deschênes, Armstrong, Solénove Énergie Québec Inc. or many others.

You can also call directly any of the three companies shown below, who will, in turn, recommend a plumber authorized for the installation of your drain water heat recovery system:

Are you eligible for this program?

Gaz Métro customers who own or rent a single-family home, a duplex or a triplex with a natural gas water heater are eligible.

Steps to follow:

You have up to 4 months following the installation of your drain water heat recovery system to make a request for financial assistance.

To obtain your rebate, send us, by mail or fax:

	Application Form: Form for Owners (existing building) (PDF | 752 ko) Form for Developers (new construction) (PDF | 741 ko)
	A copy of your bill(s) for the purchase and installation, if applicable, of the drain water heat recovery unit.

1	Financial assistance is available only for equipment meeting the requirements established by the EEF. The units currently recognized appear on this page according to their efficiency rating under the title Financial assistance from the Energy Efficiency Fund. Contact the EEF for further details regarding the units currently recognized.
2	Financial assistance may also be granted to builders of new houses. Limit of one rebate per account number. The financial assistance offered under the ecoENERGY Retrofit program may be added to the financial assistance from the EEF. However, the ecoENERGY Retrofit program is no longer accepting bookings for pre-retrofit evaluations. The program will continue to be administered until March 31, 2011. Program subject to change without prior notice.
3	The owner may undertake the plumbing work himself for a single-family home. For all other types of buildings, he may also undertake the work, provided the total cost of renovation work is lower than $ 20,000. The work must conform to the Québec Building Code.
4	In some cases, the installation of a drain water heat recovery unit could result in a loss of water pressure. Consult a professional for more information.