The HVAC industry is one of the most seasonally-affected home services business types. Search volume for terms like "AC repair" dramatically decreases in the colder months, which means costs of pay-per-click advertising can increase during the end of the year. Based on historical data from Scorpion's campaigns, costs increase by an average of 10% during this time. How can your HVAC business respond? Switch your marketing and advertising priorities to other channels.