Since natural gas (methane gas) is lighter than air, it rises. The detector should be installed below the ceiling at approx. 30cm distance Liquefied petroleum gas = propane gas and butane gas are heavier than air and therefore flow downwards. The detector should be approx. 30cm distance from the ground. Incl. Power supply 220/230V and battery. The battery only shortens the warm-up time in the event of a short power failure and is not used as the sole power supply. After purchasing this auction you will receive all the payment information you need in an eBay message. If you prefer a specific payment method that is not listed here, please contact us. We offer the following standard payment options: You receive the legally required warranty on all products. You get a 24-month warran.
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