New ventilation pipes for office in Oslo

Welcome, We need an offer for new ventilation pipes for office in Oslo at Karl Johans gate. Place is ~170m2 and contains 9 rooms. New pipes should be connected to existing ventilation system. We hage short time to receive offer from You (01. 04. 2018) Job should be done- between 05– 14. 04. 2018 Please send all questions by email.