Here are a few strategies small HVAC companies can use to really grow their business:

1. Invest in digital marketing: In today's digital age, having a strong online presence is essential for HVAC companies that want to grow their business. This can include tactics such as search engine optimization (SEO), pay-per-click (PPC) advertising, social media marketing, email marketing, and content marketing.

2. Offer great customer service: One of the most effective ways to grow your HVAC business is to provide outstanding customer service. This means being responsive to customer inquiries, addressing their concerns promptly, and ensuring that they are satisfied with the services you provide. Happy customers are more likely to refer you to their friends and family, and to leave positive reviews online.

3. Focus on building relationships: Building strong relationships with customers and other businesses in your industry can also help to grow your HVAC business. This can include attending networking events, partnering with other local businesses, and offering referral incentives to customers who refer new business to you.

4. Expand your services: Offering a wider range of HVAC services can help you to attract new customers and increase revenue. For example, you could expand into commercial HVAC services, indoor air quality solutions, or energy-efficient upgrades.

5. Invest in employee training: Finally, investing in employee training can help you to improve the quality of your services and increase customer satisfaction. This could include providing ongoing training on the latest HVAC technologies and techniques, as well as customer service and sales training to help your employees communicate effectively with customers and upsell your services.