When the ZEB is first installed there may be residual binders in the insulation, which may be released on the first few cycles, which might produce a smell. The binders are biodegradable and safe. The ZEB may emit a smell after any work is performed during a service visit, which will dissipate after several charge/discharge cycles. The temperature of the ZEB’s heat storage core is closely monitored and includes fail-safes to prevent over-charging.
If the smell doesn't improve with time, reach out to our Support Team via the App or www.tepeo.com/contact-us.