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THE EQUIPMENT GUIDE / Water heating & storage

Indirect water heaters

Stored hot water connected to a boiler system.

An indirect water heater uses heat from a separate heating source to warm a storage tank through a heat exchanger arrangement.

Plan the project ↓
HVACR / SYSTEM NOTES01Boiler circuit02Indirect tank03Domestic hot water
Indirect water heaters: Boiler circuit / Indirect tank / Domestic hot water. Original HVACR.tv conceptual illustration; labels identify project elements, not an installation sequence or construction drawing.

PLANNING / SELECTION / HANDOVER

Before choosing the equipment

Describe peak hot-water use and the existing boiler. Ask how tank recovery, boiler capacity and domestic-water priority will interact with space heating.

What belongs in the quote

Request the tank and control selection, connection scope and commissioning plan. Clarify service responsibility for both the tank and its heat source.

Think about the surrounding system

Bring the number of users, simultaneous fixtures and any commercial process demand. Ask for a sizing explanation, available energy options and a complete connection scope. The proposal should address placement, service access, drainage and coordination with the plumbing contractor, not just the heater itself.

Three questions for your contractor

  1. Can the boiler support the proposed recovery demand?
  2. How is hot-water priority controlled?
  3. What piping and controls are included?

Prepare a useful first conversation

Bring the site location, building use, equipment model details and photographs of accessible equipment. Describe the problem or planned change and any access or shutdown constraints. Ask the contractor to identify design assumptions, excluded work, required approvals and who will commission the finished system.

This is a project-planning guide. Final equipment selection and installation details need a qualified contractor or designer familiar with the site.

Continue learning

Natural Resources Canada — heating, cooling and ventilation ↗

Independent background reading. Manufacturer references illustrate equipment categories; HVACR.tv does not claim a dealer relationship or recommend a specific model.

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