Viessmann Increases Leads, Conversion Rates, and Revenue with HubSpot.Viessmann is a leading manufacturer of heating, cooling, and climate control technology. Before HubSpot, they never used a marketing automation solution and only relied on basic email marketing tools to communicate with installers they partnered with. They looked for a solution that will help them deliver the right content to the right people at the right time-and deepen their relationship with the end-users of their products. Since implementing HubSpot, they've grown their leads, customers, revenue, and reputation.