Bosch is our exclusive cold-climate heat pump. Every owner in this company runs one in their own home.
Wahl Family Heating, Cooling & Plumbing
1 Willow Avenue, Oakdale, PA 15071
Bosch is the only brand at Wahl with an exclusive designation: it is our cold-climate heat pump, full stop. The reason is engineering, not a rebate. Bosch uses a pressure transducer to ramp the compressor off the system’s own internal pressures, so the unit will not freeze a coil. Because it will not freeze the coil, we can oversize it for capacity on the coldest Pittsburgh nights, which is something we cannot safely do with other equipment. It also runs on ordinary 24V control wiring, so it gets installed correctly instead of half-commissioned.
Most of our competition installs either basic single-stage heat pumps, or they go the other direction and sell some crazy complicated inverter communicating system that most companies cannot install correctly. If you spend a fortune on something so complicated the installing company can barely set it up, and then you fight problems with it for the entire life of the equipment, you are going to have a miserable experience.David Wahl, CEO and master plumber
The pressure transducer is the piece that sets it apart. Bosch ramps the compressor up and down based on the internal pressures of the system rather than a fixed staging table. Because of how it reads and responds to those pressures, the unit will never freeze up a coil, and because it will never freeze the coil, we can oversize it. That is the move that puts more capacity into your home for a brutal Pittsburgh night, and it is not a move other manufacturers let us make.
The second reason is size and noise. A comparable Trane 5 ton high-efficiency unit is enormous. Customers do not want something the size of a shed sitting next to the patio. Bosch delivers the same job at roughly a quarter of the footprint, quietly.
The third reason is the one we care about most: it gets installed right. It runs on 24V control wiring that any competent contractor already understands. No exotic communicating setup to botch, no system that only works if the stars align during commissioning.

What we install from Bosch, and what each one is for.
The BOVA-36RXB-M15S on R454B refrigerant. Our most-installed Bosch unit and the right size for a large share of Pittsburgh homes.
The BOVA-60RXB-M15S for larger homes and for the cases where we are deliberately putting extra capacity in for cold-weather performance.
For all-electric and heat pump homes, the matched Bosch 20 SEER air handler with the Bosch indoor coil and A2L kit.
For gas homes, we pair the Bosch heat pump with a Rheem two-stage variable furnace so the system uses the heat pump down to the crossover point and the furnace below it. Best of both, sized deliberately.
All current Bosch equipment we install is on the new low-GWP refrigerant, with the A2L service kit and tooling to match.
So do a lot of our employees. We are not selling something we would not live with ourselves. That is the test David holds every product to, and it is the strongest thing we can tell you about this brand.
Standard practice says never oversize a heat pump, because oversizing causes short cycling and frozen coils. The Bosch pressure transducer changes that math. We will walk you through the sizing decision on your home rather than hiding it.
A heat pump that hands the entire load to backup electric heat in February is an expensive way to run baseboard. We design for real capacity at design temperature and we tell you the crossover point before you buy.
The most common mistake we find on other companies’ heat pump installs is the backup heat strategy. We check it on every system we touch.
Pittsburgh is exactly the climate where heat pumps get oversold and underdelivered. Shoulder season is easy and everyone looks like a hero. The test is a run of single-digit nights in January, and that is where an undersized or badly commissioned system dumps the load onto resistance heat and the homeowner opens a shocking electric bill. Our whole Bosch argument is about carrying real capacity on those nights.
It is Bosch’s dealer program for HVAC contractors, with status levels of Silver, Gold, and Platinum based on annual volume. Members get a dedicated support line, product registration rewards, and placement in Bosch’s contractor locator.
Because of the pressure transducer. Bosch ramps the compressor off the system’s internal pressures rather than fixed stages, so it will not freeze a coil, which means we can oversize it for cold-weather capacity. It also runs on standard 24V control wiring, so it gets installed correctly, and it is roughly a quarter the size of a comparable 5 ton high-efficiency unit from a competitor.
Sized correctly, yes, and that sizing is the entire conversation. We calculate your home’s heat loss, size for capacity at design temperature, and tell you the crossover point where backup heat takes over. If a heat pump is the wrong answer for your house, we will say so.
It depends on your fuel costs, your ductwork, and how long you are staying. Very often the right answer in Pittsburgh is dual fuel: a Bosch heat pump paired with a gas furnace, so you run the heat pump through the mild two thirds of the season and the furnace in deep cold.
That is exactly why we chose it. It runs on conventional 24V controls rather than a proprietary communicating protocol, so diagnosis is straightforward and you are not held hostage to one contractor who happens to own the right laptop.
Yes. The BOVA units we install are on R454B, and our technicians and tooling are set up for A2L refrigerants as standard practice.
Upfront pricing before any work starts, both standard and member pricing on every option, and no pressure. Backed by our 100% satisfaction guarantee.