Technical reference

Systems

Model numbers · serials · specs · all the details

HVAC
Central — Bosch
Air handlerBosch BVA-24WN1-M18
Air handler serial399A-038-00119-7739832071
CondenserBosch BOVB-36HDN1-M18M
Condenser serial399A-140-000189-8733955036
LocationAir handler: anteroom upstairs · condenser: left side
RefrigerantR410A
Last serviceSep 3 2025 · James River Air · invoice S412382
Mini split — Studio (single zone)
Indoor headMitsubishi MSZ-GL15NA · serial 08E39194
Outdoor unitMitsubishi MUZ-GL15NA · serial 0XC08237
Capacity15,000 BTU · R410A
FilterClean every few months
Mini split — Upstairs (multi-zone)
Bedroom headMitsubishi MSZ-GL12NA · serial 63E14285
Anteroom headMitsubishi MSZ-GL09NA · serial 64E24516
Outdoor unitMitsubishi MXZ-2B20NA · serial 5003763 T
Capacity20,000 BTU multi-zone · R410A
FilterClean every few months
Boiler — Weil-McLain CGM-4-PI
Series / serialSeries 7 · serial 672900
FuelNatural gas
Capacity105,000 BTU input · 83,000 BTU DOE output
AgeOriginal — est. 1970s–80s cast iron
LocationBasement
ServiceJames River Air · annual fall check
Water
Water heater — State ProLine
ModelState ProLine 50 gallon
Serial2548146175646
FuelNatural gas
InstalledFebruary 2026 · Carroll's Plumbing
Water softener — Water Right
ModelWater Right Impression Plus IMP-1054-00-00-00-00-VT-00-00-XX
Control valveV1XPDME-88WR · serial VLV11095908
Bypass valveV3001-04 · serial BND11343261
Capacity42,000 grains · installed Feb 2026
Filter14-GCB2-10 carbon · change every 4–6 months
Reverse osmosis — Atlas Filtri
ModelAtlas Filtri Oasisdpro
LocationUnder kitchen sink
InstalledFebruary 2026 · Carroll's Plumbing
Filters5 total · sediment every 3–6 months
Other systems
Fireplace, solar, crawlspace
FireplaceMendota gas · living room · model TBD (check plate in firebox)
ChimneyMasonry · 18 ft · flue tile liner · 8×13 flue · last service Jun 2018 ⚠️
SolarSolarEdge inverter · Convert Solar · Aug 2022
CrawlspaceJES CleanSpace + drainage · Sep 2015 · 25yr warranty to Sep 2040
Sump pumpZoeller · basement