We are a privately held company in Preston, ID.

Grantham HVAC LLC is a trusted heating and cooling company based in Preston, ID, offering reliable HVAC services for residential and light commercial customers. Our experienced team specializes in AC repairs, furnace installations, heat pump systems, ductwork, water heater replacements, fireplace installs, and thermostat upgrades. Whether you’re building a new home or updating your current system, we’re committed to quality workmanship, honest service, and energy-efficient solutions. Proudly ser...

Grantham HVAC LLC is a trusted heating and cooling company based in Preston, ID, offering reliable HVAC services for residential and light commercial customers. Our experienced team specializes in AC repairs, furnace installations, heat pump systems, ductwork, water heater replacements, fireplace installs, and thermostat upgrades. Whether you’re building a new home or updating your current system, we’re committed to quality workmanship, honest service, and energy-efficient solutions. Proudly serving Preston, ID with prompt service and personalized care, Grantham HVAC LLC is here to keep your home comfortable all year long.