Meet Our Team Jenni L Office Manager No Reviews Brandi B Office Administration No Reviews Randy M Installation Manager 1 Review Tristin H Installation Technician 1 Review Terry Q Installation Technician 33 Reviews Sean R Installation Technician No Reviews Aaron R Installation Technician/Service Technician No Reviews Need HVAC Service? Contact the experts at ESI Heating. Call us at 517-647-6906! Request Service ESI Heating proudly provides HVAC service to Portland, Dewitt, Grand Ledge, the Greater Lansing area and the surrounding communities. Visit our service area page for more coverage details, call us at 517-647-6906, or request service online today.