Frequently Asked Questions
Gas Water Heaters
Is a carbon monoxide (CO) detector mandatory?
Yes, it is mandatory. The CO detector must be installed 1.5 meters above the floor and no closer than 0.5 meters from the heater and ventilation ducts. This is a safety requirement.
Is a ventilation opening needed in the bathroom door?
Yes, if the heater is in an enclosed space (such as a bathroom), a ventilation opening of at least 300 cm² is required at the bottom of the door.
Is incoming ventilation necessary?
Yes. A gas water heater must only operate in a room with a constant supply of fresh air (e.g., a ventilation grille on the exterior wall or a gap under the door).
Can a kitchen extractor affect the draft?
Yes, without incoming ventilation, a powerful extractor hood can create backdraft and lead to carbon monoxide entering the room.
What to do if the heater goes out or “pops”?
This may indicate poor draft, a clogged heat exchanger, or lack of air supply. Do not use the heater until it has been inspected by a specialist.
Can the heater be connected to a shared chimney?
Only if the chimney complies with regulations and has been inspected by a certified chimney sweep. Connection with a kitchen extractor is prohibited.
How often should the heater be serviced?
An annual inspection, cleaning of the heat exchanger, and CO measurement are recommended. This extends the unit’s lifespan and ensures safety.
Gas Boilers (Heating)
Is project planning required for installing a gas boiler?
Yes, installing a boiler requires a design approved by technical supervision. Unauthorized installation is prohibited.
How to tell if a gas boiler is malfunctioning?
Noise, gas smell, shutdowns, or pressure surges are all signs of malfunction. Turn off the boiler and call a specialist.
Can a boiler operate without external ventilation?
No. Even if the boiler has a sealed combustion chamber, air supply and exhaust must be properly ensured.
Is annual maintenance of a gas boiler necessary?
Yes, it is mandatory. Manufacturers require annual inspection of the heat exchanger, burner, and controls. Without it, the warranty is void.
How does poor ventilation affect boiler operation?
Poor ventilation can cause overheating, soot formation, and even emergency shutdowns of the boiler.
Can a water heater be connected to a gas boiler?
Yes, if appropriate outlets and a connection scheme are available. It is best done by a specialist.
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