Bob's Heating and Air Conditioning can't recommend heat pumps for use in the Denver and front range area.  Heat pumps work poorly in areas where extreme temperatures are experienced, so especially in the winter when Denver temperatures can get very cold, a heat pump are normally insufficient for heating a home or office.  When temperatures drop below about 0o F, as they do in the Denver area in winter, heat pumps become especially inefficient, consuming a lot of power but providing no home heating.