Case Study: Culligan Harvey boosts lead quality and cuts invalid traffic with Lunio

Culligan Harvey improves MQL conversion rate by 10% and cuts invalid traffic by 54% with Lunio

Culligan Harvey, the UK’s leading manufacturer of water softeners and filtration systems, was struggling with a rise in spam and low-quality leads from paid search and social campaigns. Rising media costs and tighter budgets made it harder to keep spend focused on genuine, high-intent prospects, while missing or fake contact details were hurting lead qualification and sales efficiency. Culligan Harvey turned to Lunio for invalid traffic protection.

Lunio was deployed across Google Search, Performance Max, and Meta to automatically filter invalid traffic, block suspicious activity, and help Culligan Harvey identify fraudulent clicks. The results were strong: a 54% reduction in invalid traffic, a 42% increase in lead-to-demo conversions, and a 10% increase in lead-to-MQL rate. Lunio also helped uncover and blacklist a competitor’s fraudulent IP and support a refund request to Google for invalid clicks.

Culligan Harvey

Oliver Smith

eCommerce & Digital Manager