Harvest Thermal is a system that pairs an efficient heat pump with a hot-water thermal-storage tank and a smart controller, so one heat pump delivers home heating, cooling, and domestic hot water. By storing heat in water and running when energy is cheaper and cleaner, it cuts both energy use and carbon. Air Synergy is an authorized Harvest Thermal installer.
What is Harvest Thermal, exactly?
Instead of separate appliances for heat, air conditioning, and hot water, Harvest Thermal centers everything on a heat pump plus a "thermal battery" — essentially a well-insulated tank of hot water. A smart controller decides when to make and store heat (favoring off-peak, lower-cost, lower-carbon hours) and then delivers heating and hot water on demand, with cooling handled by the heat pump in summer.
How does it actually work?
The heat pump charges the storage tank with heat when conditions are favorable. That stored thermal energy then supplies your home's space heating and your hot water taps, while the same heat pump provides cooling in the warm months. Because making and storing the heat is decoupled from when you use it, the system can lean on the cheapest, cleanest energy windows — the core idea behind its savings.
Why would a homeowner choose it?
- One efficient system for heating, cooling, and hot water — simpler than three separate appliances.
- Lower energy use and carbon by combining heat-pump efficiency with smart timing.
- Electrification-friendly — a clean path off gas for whole-home comfort.
- Pairs naturally with the efficiency mindset behind heat-pump water heaters.
When might it not be the fit?
Harvest Thermal needs space for the storage tank and suits homeowners committed to electrifying and consolidating systems. If you only need to solve one piece — say, just a water heater or just cooling — a focused solution may be simpler. The honest way to know is an assessment of your home, goals, and space. Compare the standalone options in tank vs. tankless vs. heat-pump water heater and heat pump vs. furnace.
Savings depend on your specifics. Actual energy and cost results vary with your home, usage, and utility rates and plan. We model your situation honestly rather than promise a fixed figure.
Why have Air Synergy install it?
Air Synergy is an authorized Harvest Thermal installer and a Mitsubishi Diamond Elite Contractor, family-owned with decades of combined technician experience in the Bay Area and a 4.9-star rating across 189 reviews. We design and install whole-home systems for distinctive homes and explain the trade-offs in plain English. Explore specialty systems.
Your next step
Curious whether Harvest Thermal fits your home and goals? Book a free in-home consultation — we'll assess your space and lay out the system and the realistic benefits, in writing.
System description reflects how Harvest Thermal pairs a heat pump with thermal storage; savings depend on home, usage, and rates. Air Synergy is an authorized Harvest Thermal installer and a Mitsubishi Diamond Elite Contractor (per Air Synergy). Terms in the glossary.
Common questions
What is a Harvest Thermal system?
It's a system that pairs a heat pump with a hot-water thermal-storage tank and a smart controller, so one heat pump provides home heating, cooling, and domestic hot water. The storage tank lets it run when energy is cheaper and cleaner, then deliver comfort on demand.
How does Harvest Thermal save money?
It uses an efficient heat pump for everything and shifts much of its energy use to off-peak, lower-cost, lower-carbon hours by storing heat in water. That combination of high efficiency and smart timing is where the savings come from, though exact results depend on your home and utility rates.
Is Harvest Thermal right for my home?
It's a great fit for homeowners who want to electrify and consolidate heating, cooling, and hot water into one efficient system, with space for the storage tank. Air Synergy is an authorized Harvest Thermal installer and can assess whether it fits your home during a free estimate.