Tomasz Kosierkiewicz  no you cannot. The pressures delivered through BiPAP are different since it requires two separate pressures(IPAP and EPAP), whereas a CPAP does not have those and you cannot turn that off. If you feel your BiPAP is not working for you talk to your HCP for a different approach. Also, check your Respironics model number and make sure it is NOT involved in the recent recall. Check on here https://philipsrecalls.com/ Do not use it until you are sure that it is safe. Again, contact your HCP for assistance with this.