A Pleasanton homeowner on Castledown Road called us with a setup a lot of older Tri-Valley houses still run. A split air conditioner outside, a gas furnace inside, two systems aging on two different clocks. They were paying for two sets of maintenance and watching at least one seasonal breakdown a year, and the January gas bill kept climbing. By the time I showed up they had already decided what they wanted. One heat pump to do both jobs.
What they came in already knowing
This was not a homeowner I needed to sell on heat pumps. They had read enough to know a single system could replace both the AC and the furnace, and they wanted the two boxes gone. My job on the consult was narrower. I walked them through brand and efficiency tiers and let the numbers decide. They landed on the Bryant 18 SEER2 platform, 9.8 HSPF2, which runs slim and quiet on R-454B refrigerant. That last detail is the one most people skip past. It is also the part that shaped the whole install.
The equipment that went in
The outdoor unit is a Bryant 37MUHAQ36AA3, a 3-ton heat pump at 18 SEER2 and 9.8 HSPF2, 208/230V single phase, charged with R-454B. Indoors we matched it with the Bryant 45MUHAQ36XX3 modular air handler and put an Ecobee on the wall configured for heat-pump staging.
The mechanical work around the equipment is where a clean install separates from a quick one. We set a new condenser pad and ran line-set covers over the outdoor refrigerant lines. Then we rebuilt the duct connections and the return-air run at the air handler so the new equipment was not breathing through the old system’s compromises. On the high-voltage side we put in a new plenum, a new disconnect box, a fresh whip and fuses, and a surge protector. The old AC and furnace came out and were hauled off. The old refrigerant was recovered properly rather than vented.
Why R-454B changed how we worked
R-454B is the refrigerant the industry is moving to as R-410A phases down under the EPA AIM Act. It carries roughly a third of the global-warming potential, which is the whole point of the switch. The catch is that it sits in the A2L class, mildly flammable, so the install carries different leak-detection and ventilation rules than the R-410A work most techs grew up on. None of that is hard if you are trained for it. It becomes a maintenance liability if you are not. We are certified for A2L handling. This is the question I tell people to ask out loud when they collect heat-pump bids in 2025 and 2026. Ask whether the installer is A2L-certified. The answer tells you whether the system will age well.
What the homeowner walked away with
One system instead of two, year-round comfort off a single thermostat, and no more juggling separate AC and furnace service. On rebates, we work with BayREN, MCE, PG&E, and EBCE/Ava, plus manufacturer instant rebates. Amounts and funding vary by territory and cycle, so we confirm what is actually paying when we write the estimate.
The equipment is covered by our 10-year parts and 10-year labor warranty alongside the Bryant factory warranty. If you are weighing a similar swap, our heat pump and HVAC installation work runs through our HVAC division, Bay Area HVAC Service.
