Get in touch today for first class heating, ventilation and air conditioning services Contact Us D.W Smith Services Ltd Your first choice for air conditioning, heating and ventilation systems in Hampshire and Bedfordshire. The highest quality Our products are available to you with expert installation and 5 year warranties. Professionalism is guaranteed Our professional indemnity design insurance will ensure that your business is in safe hands. Installations and inspections We offer a nationwide service and with over 18 years' experience within the industry.