Educational information only
Heating, cooling, water-heating, fireplace and indoor-air systems involve fuel, electricity, pressure, hot water, refrigerants, combustion products and building-code requirements. The site cannot inspect a property or determine whether equipment is safe.
No diagnosis or emergency service
Descriptions of symptoms are not a diagnosis. For gas odour, fire, smoke, a carbon-monoxide alarm or immediate danger, leave and contact emergency services or the fuel supplier from a safe location.
No price or savings guarantee
Costs, rebates, utility rates, climate, contractor availability and product eligibility vary. Any calculation or comparison is an illustrative planning aid, not a quote or promised saving.
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Use the current manufacturer instructions, public authorities, utilities and appropriately qualified trades. Local requirements take priority over general web content.