How much bigger a system do I need for Escondido's heat compared to coastal San Diego?
Escondido's summer load is meaningfully higher than coastal zones, so undersizing is the most common mistake we correct on replacements. We run a Manual J load calculation based on actual local climate data rather than square footage, and a properly sized system for Escondido's heat typically costs no more than the same tonnage elsewhere, it just needs to be the right capacity to begin with.