Seven ounces of R-404A
An undercounter refrigerator on a quick-service line: a Delfield 406 series on a simple dial control, R-404A, 7 ounces of charge. Seven ounces is a tiny charge.
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Insights from B&M Mechanical: HVAC and refrigeration field notes from New York City.
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37 entries, newest first
- Seven ounces of R-404AJob note · Reach-ins & prep tables
- Back on the roof with a thermometerJob note · Rooftop units & AC
- The valve that meters everythingJob note · Walk-ins
- The chart inside a Hoshizaki’s panelJob note · Ice machines
- A condenser packed with flourJob note · Reach-ins & prep tables
- An iced coil and frosted compressorsJob note · Rooftop units & AC
- A cheap control running an expensive boxJob note · Walk-ins
- Scale is what’s eating your ice machineJob note · Ice machines
- From 80 to 76 in forty-five minutesJob note · Rooftop units & AC
- Cooked at the terminal blockJob note · Reach-ins & prep tables
- The filters up on the roofJob note · Rooftop units & AC
- A Russell unit cooler full of iceJob note · Walk-ins
- Cocktail bar: ice on a back-bar cooler’s coilCase study · Reach-ins & prep tables
- Catering kitchen: a new expansion valve, then the rooftop unitCase study · Walk-ins
- Care-facility kitchen: new defrost timers on two reach-insCase study · Reach-ins & prep tables
- Butcher’s cold room: drain sludge, a condensate pump and a new expansion valveCase study · Walk-ins
- Walk-in floor rebuilt from the subfloor upCase study · Walk-ins
- Inside a Fujitsu wall headJob note · Splits & ductless
- The parts of an install nobody photographsJob note · Splits & ductless
- Daikin multi-zone on a townhouse roofJob note · Splits & ductless
- Building a walk-in floor from the subfloor upJob note · Walk-ins
- The fan on top of the walk-inJob note · Walk-ins
- What the display can’t seeJob note · Walk-ins
- White ice is not an ice problem.Job note · Ice machines
- The controller said “Making Ice.” The bin disagreed.Job note · Ice machines
- A new fan cycling switch for a bakery’s ManitowocJob note · Ice machines
- Ice Is Food. Start Treating It That Way.Guide · Ice machines
- Top 3 things health department looks for and how to avoid getting shut downGuide · Ice machines
- 3 signs your walk-in cooler is about to failGuide · Walk-ins
- Our Russell walk-in is warm.Job note · Walk-ins
- B&M Mechanical is officially your Universal Coolers Authorized Service ProviderCompany news · Reach-ins & prep tables
- B&M Mechanical is officially your GE Authorized HVAC ProCompany news · Splits & ductless
- B&M Mechanical is now an authorized service provider for ManitowocCompany news · Ice machines
- Should you turn off the A/C when you’re not home?Guide · Controls & thermostats
- Is a maintenance plan worth the money?Guide · Maintenance
- 8 Heating Scenarios That Need Immediate AttentionGuide · Heating
- Top 5 Commercial HVAC Issues and How to Fix ThemGuide · Rooftop units & AC
Nothing published yet for that combination. Call or text 718 802 1700 and ask us directly.
GuidesLonger reads(B&M — 04)
Longer reads for the people who run the equipment.
Ice Is Food. Start Treating It That Way.
Under the FDA Model Food Code, ice isn't a garnish, a convenience, or an afterthought. It's legally classified as a food product.
Read the guide →8 Heating Scenarios That Need Immediate Attention
Eight heating failures that should not wait until morning, from gas smells and short cycling to no heat in a rental, and what to do first in each case.
Read the guide →Top 5 Commercial HVAC Issues and How to Fix Them
The five commercial HVAC failures we see most in NYC restaurants and retail, what causes each one, and which fixes hold up versus which ones come back.
Read the guide →Is a maintenance plan worth the money?
What an HVAC and refrigeration maintenance plan covers, what it prevents, and how to judge whether one pays for itself in a NYC business or home.
Read the guide →
Five jobs written up in full, from the first call to the parts list.
Case studies · field photoCase studiesThe long version(B&M — 05)
The call, what we found, the work in order, and the parts.
Written for the people who manage the building. Each client is described by sector.
- Cocktail barCocktail bar: ice on a back-bar cooler’s coilHospitality · 2 min read
- Catering kitchenCatering kitchen: a new expansion valve, then the rooftop unitHospitality · 4 min read
- Kitchen serving a nursing homeCare-facility kitchen: new defrost timers on two reach-insEmergency & Critical Response · 2 min read
- Independent butcher shopButcher’s cold room: drain sludge, a condensate pump and a new expansion valveRetail · 2 min read
- Commercial kitchenWalk-in floor rebuilt from the subfloor upRestaurant & QSR · 3 min read
From the officeCompany news(B&M — 06)
Authorizations, milestones and news from the shop.
- 5 Apr 2026
- GE Authorized HVAC Pro
- Since 1992
- In business in New York, from our base in Brooklyn. More on the About page
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