Buva EcoHeat 18-4 spare parts

In brief

Instalpunt supplies 108 original parts for the Buva EcoHeat 18-4, including fans, temperature sensors and NTC sensors, pressure sensors. Order online.

108Spare parts
63In stock
€18.95From
21Types

Looking for parts for the Buva EcoHeat 18-4 (boiler)? Below are all 108 original parts, grouped by part type. Choose a type to jump straight to the right table.

Quick left to the right part for the Buva EcoHeat 18-4

Part	From	Delivery
Fan Atag fan 230V	€305.95	In stock
Ignition part Atag ignition electrode incl. seal Q and SHR after new heat exchanger 2013 from 2009	€104.45	In stock
Pressure sensor Atag water pressure sensor Huba	€114.45	In stock
Flow sensor Atag flow sensor	€59.95	In stock
Temperature sensor Atag NTC return 10K	€38.95	In stock
Heat exchanger Atag plate heat exchanger OSS2 + sealing rings	€176.95	In stock

Prices incl. VAT, taken directly from our checkout. Below is the complete parts list for this model.

Installer or self-employed engineer? Create a business account: prices excl. VAT and invoices in your company name.

Fans for the Buva EcoHeat 18-4 (2)

Part	Item no. / mfr. no.	Price	Stock
Atag fan 230V	8139182 Mfr. no. S4742800	€305.95	In stock	View & order
Rewind refurbished fan for Atag A/E series (S4742800)	8930071	€239.95	In stock	View & order

Temperature sensors and NTC sensors for the Buva EcoHeat 18-4 (3)

Part	Item no. / mfr. no.	Price	Stock
Atag NTC domestic hot water	8139185 Mfr. no. S4746100	€50.95	In stock	View & order
Atag NTC return 10K	8139178 Mfr. no. S4746000	€38.95	In stock	View & order
Atag NTC flow 10K	8139180 Mfr. no. S4745900	€50.95	In stock	View & order

Pressure sensors for the Buva EcoHeat 18-4 (1)

Part	Item no. / mfr. no.	Price	Stock
Atag water pressure sensor Huba	8135490 Mfr. no. S4466300	€114.45	In stock	View & order

Flow sensors and flow switches for the Buva EcoHeat 18-4 (1)

Part	Item no. / mfr. no.	Price	Stock
Atag flow sensor	8139168 Mfr. no. S4746800	€59.95	In stock	View & order

Pumps for the Buva EcoHeat 18-4 (1)

Part	Item no. / mfr. no.	Price	Stock
Atag pump UPM 15-70 A 130mm for EC series	8130016 Mfr. no. S4783100	€566.95	Made-to-order item	View & order

Heat exchangers for the Buva EcoHeat 18-4 (1)

Part	Item no. / mfr. no.	Price	Stock
Atag plate heat exchanger OSS2 + sealing rings	8139203 Mfr. no. S4744900	€176.95	In stock	View & order

Gas valves and gas control for the Buva EcoHeat 18-4 (3)

Part	Item no. / mfr. no.	Price	Stock
Atag gas control block	8139183 Mfr. no. S4751900	€208.95	In stock	View & order
Atag venturi SHR 35 for OSS2	8136305 Mfr. no. S4318920	€117.95	Made-to-order item	View & order
Atag injector 5,2 mm propane SHR S4386610	8139104 Mfr. no. S4386610	€43.95	Made-to-order item	View & order

Ignition and ionisation for the Buva EcoHeat 18-4 (1)

Part	Item no. / mfr. no.	Price	Stock
Atag ignition electrode incl. seal Q and SHR after new heat exchanger 2013 from 2009	8138101 Mfr. no. S4710100	€104.45	In stock	View & order

Siphons and condensate drains for the Buva EcoHeat 18-4 (1)

Part	Item no. / mfr. no.	Price	Stock
Atag siphon SHR	8139064 Mfr. no. S4421200	€53.95	In stock	View & order

Burners for the Buva EcoHeat 18-4 (1)

Part	Item no. / mfr. no.	Price	Stock
Atag burner bed assy. OSS2	8138103 Mfr. no. S4714700	€166.95	In stock	View & order

Maintenance and service kits for the Buva EcoHeat 18-4 (2)

Part	Item no. / mfr. no.	Price	Stock
Atag maintenance set for OSS2	8139216 Mfr. no. S4784800	€76.95	In stock	View & order
Atag maintenance set OSS2 with ignition electrode	8139603 Mfr. no. S4785600	€160.95	In stock	View & order

Valves for the Buva EcoHeat 18-4 (3)

Part	Item no. / mfr. no.	Price	Stock
Atag safety relief valve Duco 3 bar	8135200 Mfr. no. S4344630	€42.45	In stock	View & order
Atag automatic air vent chrome SHR for OSS1/2/3/4	8135041 Mfr. no. S4419110	€64.95	In stock	View & order
Atag mixing valve SHR	8131121 Mfr. no. S4312500	€91.95	In stock	View & order

Electrical parts for the Buva EcoHeat 18-4 (2)

Part	Item no. / mfr. no.	Price	Stock
Atag ignition transformer	8139184 Mfr. no. S4744100	€55.95	In stock	View & order
Atag fuse glass T3.15 250V 3 pcs	8139166 Mfr. no. S4749200	€43.95	Made-to-order item	View & order

Tap parts for the Buva EcoHeat 18-4 (1)

Part	Item no. / mfr. no.	Price	Stock
Atag cartridge 3-way valve E series after 10/2012 VC4013	8139619 Mfr. no. S4828700	€48.95	In stock	View & order

Cables and wiring harnesses for the Buva EcoHeat 18-4 (9) all Buva cables and wiring harnesses →

Part	Item no. / mfr. no.	Price	Stock
Atag spark plug cable set	8139177 Mfr. no. S4754400	€50.95	In stock	View & order
Atag wiring harness 24V low voltage basic	8139172 Mfr. no. S4744700	€88.95	Made-to-order item	View & order
Atag wiring harness 24V low voltage combi	8139173 Mfr. no. S4744800	€48.95	In stock	View & order
Atag connector outdoor sensor A	8139588 Mfr. no. S4745400	€29.95	Made-to-order item	View & order
Atag connector external safety control	8139176 Mfr. no. S4745200	€31.95	In stock	View & order
Atag connector room thermostat	8139175 Mfr. no. S4745100	€31.95	Made-to-order item	View & order
Atag connector opentherm	8139757 Mfr. no. S4745000	€29.95	Made-to-order item	View & order
Atag wiring harness 230v upm pump-fan a/e	8139778 Mfr. no. S4793300	€49.95	Made-to-order item	View & order
Atag wiring harness pwm control a/e series	8139785 Mfr. no. S4762100	€33.95	Made-to-order item	View & order

Gasket sets for the Buva EcoHeat 18-4 (1)

Part	Item no. / mfr. no.	Price	Stock
Atag seal set pipes	8139209 Mfr. no. S4755100	€60.95	Made-to-order item	View & order

Gaskets and seals for the Buva EcoHeat 18-4 (30) all Buva gaskets and seals →

Part	Item no. / mfr. no.	Price	Stock
Atag seal burner bed/upper tray Q38 for OSS2	8138119 Mfr. no. S4717300	€30.45	In stock	View & order
Atag seal heat exchanger/upper tray Q38 for OSS2	8138121 Mfr. no. S4718400	€34.95	In stock	View & order
Atag O-ring siphon R 46 x 3 mm	8135190 Mfr. no. S4309900	€30.95	Made-to-order item	View & order
Atag sealing ring gas valve/venturi for OSS1/2/3/4	8139033 Mfr. no. S4337610	€24.95	In stock	View & order
Atag sealing ring venturi/fan for OSS1/2/3/4	8139034 Mfr. no. S4325610	€24.95	In stock	View & order
Atag lip ring outlet stub	8139019 Mfr. no. S4472600	€24.95	In stock	View & order
Atag O-ring 2 pcs	8131119 Mfr. no. S4312300	€26.95	In stock	View & order
Atag O-ring set 2 pcs 21.89 x 2.62 mm plate heat exchanger	8131315 Mfr. no. S4360500	€23.95	In stock	View & order
Atag lip seal 80mm for OSS1/2/3/4	8135123 Mfr. no. S4304200	€31.95	In stock	View & order
Atag gasket	8135156 Mfr. no. S4323710	€23.95	In stock	View & order
Atag seal lower tray OSS2	8138117 Mfr. no. S4714900	€23.95	In stock	View & order
Atag sealing ring intake fan SHR for OSS1/2/3/4	8135246 Mfr. no. S4309500	€22.95	In stock	View & order
Atag gasket fan mouth SHR for OSS1/2/3/4	8135270 Mfr. no. S4305700	€24.95	In stock	View & order
Atag gasket air supply Ø80 mm	8135153 Mfr. no. S4323510	€32.95	In stock	View & order
Atag O-ring 13.94 x 2.62 mm air vent/plate heat exchanger for OSS1/2/3/4	8131325 Mfr. no. S4342300	€23.95	In stock	View & order
Atag O-ring siphon/condensate tray 18.72 x 2.62 mm	8138012 Mfr. no. S4443200	€24.95	In stock	View & order
Atag O-ring set 4.8 x 1.8 mm heat exchanger connection	8137056 Mfr. no. S4322320	€22.95	In stock	View & order
Atag O-ring 14.30 x 2.40 mm gas pipe A 3 pcs	8139187 Mfr. no. S4749500	€34.95	In stock	View & order
Atag O-ring 10.77 x 2.62 DHW (4 pcs)	8139192 Mfr. no. S4743700	€21.95	In stock	View & order
Atag O-ring 17.86 x 2.62 flow/return (4 pcs)	8139193 Mfr. no. S4753800	€36.95	In stock	View & order
Atag O-ring 18.64 x 3.53 mm plate heat exchanger (4 pcs)	8139201 Mfr. no. S4743800	€26.95	In stock	View & order
Atag sealing ring pump 1" 2 pcs	8139237 Mfr. no. S0009000	€28.95	Made-to-order item	View & order
Atag set of O-rings Ø 14x2 mm flow sensor (4 pcs)	8139726 Mfr. no. S4771900	€23.95	In stock	View & order
Atag seal control unit casing	8139219 Mfr. no. S4754700	€31.95	Made-to-order item	View & order
Atag seal casing SHR	8139058 Mfr. no. S4479500	€57.95	Made-to-order item	View & order
Atag O-ring 18 x 2 mm hydroblock cap (4 pcs))	8139198 Mfr. no. S4753700	€28.95	Made-to-order item	View & order
Atag O-ring 14 x 1,78 mm pressure sensor SHR	8139515 Mfr. no. S4309100	€29.95	Made-to-order item	View & order
Atag O-ring Ø 40,87 x 3,53 mm for siphon Economiser	8139728 Mfr. no. S4770900	€30.95	Made-to-order item	View & order
Atag seal ionisation/ignition OSS all	8138100 Mfr. no. S4709800	€55.95	Made-to-order item	View & order
Atag O-ring 5 x 2 mm flow sensor/flow/return 5 pcs	8137066 Mfr. no. S4329400	€31.95	Made-to-order item	View & order

Pipes, tubes and hoses for the Buva EcoHeat 18-4 (6) all Buva pipes, tubes and hoses →

Part	Item no. / mfr. no.	Price	Stock
Atag overflow pipe SHR for OSS1/2/3/4	8136272 Mfr. no. S4421400	€45.95	In stock	View & order
Atag pipe Ø22 mm flow/return	8139194 Mfr. no. S4743200	€56.95	In stock	View & order
Atag gas pipe A244	8139586 Mfr. no. S4741300	€93.95	Made-to-order item	View & order
Atag pipe 15 cold/hot	8139189 Mfr. no. S4743300	€60.95	Made-to-order item	View & order
Atag flow pipe OSS2	8139205 Mfr. no. S4743000	€111.95	Made-to-order item	View & order
Atag pipe hydroblock/pump	8139207 Mfr. no. S4743100	€57.95	In stock	View & order

Casing and panels for the Buva EcoHeat 18-4 (4)

Part	Item no. / mfr. no.	Price	Stock
Atag casing door E series	8139236 Mfr. no. S4735900	€76.95	In stock	View & order
Atag cover air supply 80mm SHR	8139210 Mfr. no. S4323310	€29.95	Made-to-order item	View & order
Atag cover air supply 120/80mm	8138013 Mfr. no. S4323410	€44.95	Made-to-order item	View & order
Atag casing assy e	8139815 Mfr. no. S4823000	€297.95	Made-to-order item	View & order

Insulation for the Buva EcoHeat 18-4 (1)

Part	Item no. / mfr. no.	Price	Stock
Atag insulation set tube plate left and right Q/E for OSS1/2/3/4	8138109 Mfr. no. S4730900	€33.95	In stock	View & order

Fixing material for the Buva EcoHeat 18-4 (13) all Buva fixing material →

Part	Item no. / mfr. no.	Price	Stock
Atag sealing cap exhaust pipe Ø13mm for flue gas measurement	8136420 Mfr. no. S4521600	€22.95	In stock	View & order
Atag locking ring small	8139997 Mfr. no. S4415220	€34.95	In stock	View & order
Atag Enigma closure large	8139160 Mfr. no. S4415120	€25.95	In stock	View & order
Atag plug test points concentric connector (2x)	8139856 Mfr. no. S4742600	€31.95	In stock	View & order
Atag screw M5 x 12 mm hex socket countersunk (3 pcs) for OSS1/2/3/4	8139217 Mfr. no. S4440000	€22.95	In stock	View & order
Atag locking spring gas pipe A series	8139222 Mfr. no. S4751800	€43.95	Made-to-order item	View & order
Atag cap hydroblock 1/2"	8139197 Mfr. no. S4747000	€52.95	Made-to-order item	View & order
Atag cap air vent SHR 3 pcs for OSS1/2/3/4	8139162 Mfr. no. S4380600	€41.95	Made-to-order item	View & order
Atag key set 8 x 350 mm bits: Phillips, hex 4 and 5 mm	8131905 Mfr. no. S4278100	€155.95	Made-to-order item	View & order
Atag spring ignition/ionisation electrode	8139239 Mfr. no. S4710400	€28.95	Made-to-order item	View & order
Atag screw taptite M5 x 8 mm ck-pd (3 x )	8139214 Mfr. no. S4167500	€21.95	In stock	View & order
Atag bolt M6 x 20 mm stainless steel hex socket bp 4,2 3 pcs	8139513 Mfr. no. S4307220	€29.95	Made-to-order item	View & order
Atag bolt M5 x 12 mm gr phase hexagon din7985 (5 x )	8139213 Mfr. no. S4418710	€25.95	In stock	View & order

Other parts for the Buva EcoHeat 18-4 (21)

Part	Item no. / mfr. no.	Price	Stock
Atag lower tray assembled OSS2	8138107 Mfr. no. S4730700	€120.45	In stock	View & order
Atag 3-way valve motor clip after 10/2012 Combi	8139621 Mfr. no. S4828600	€132.45	In stock	View & order
Atag clamping rod condensate tray for OSS1/2/3/4	8139052 Mfr. no. S4310700	€31.95	In stock	View & order
Atag burner toggle rod for OSS1/2/3/4	8139057 Mfr. no. S4310800	€32.95	In stock	View & order
Atag pipe nipple 1/2"x15 mm coupling gas pipe	8136392 Mfr. no. S4493300	€45.95	In stock	View & order
Atag condensate collector PF/ESHR	8136277 Mfr. no. S4421300	€44.95	In stock	View & order
Atag Economiser complete set	8139725 Mfr. no. S4782400	€729.95	In stock	View & order
Atag water trap pressure sensor	8137098 Mfr. no. S4325900	€34.95	In stock	View & order
Atag connection lead 230V for e.g. A244C S4746600	8139174 Mfr. no. S4746600	€52.95	Made-to-order item	View & order
Atag intake piece SHR32/35 for OSS2	8139082 Mfr. no. S4325510	€59.95	Made-to-order item	View & order
Atag upper tray assy OSS2	8139181 Mfr. no. S4735100	€125.95	Made-to-order item	View & order
Atag condensate plug 1/4" for OSS1/2/3/4	8139712 Mfr. no. S4674500	€30.95	Made-to-order item	View & order
Atag flow restrictor CH d=10mm black	8139196 Mfr. no. S4753200	€55.95	Made-to-order item	View & order
Atag flow restrictor DHW 10,0 l/min yellow	8139772 Mfr. no. S4762000	€71.95	Made-to-order item	View & order
Atag leak detection spray 400 ml	8139112 Mfr. no. S4083000	€66.95	Made-to-order item	View & order
Atag siphon cup Economiser	8139727 Mfr. no. S4758900	€46.95	Made-to-order item	View & order
Atag hose clamp stainless steel 20-32mm for OSS1/2/3/4	8139224 Mfr. no. S4395600	€31.95	Made-to-order item	View & order
Atag quick-release set E-SHR	8136273 Mfr. no. S4421900	€51.95	Made-to-order item	View & order
Atag outlet stub Ø80mm PP + ring	8139551 Mfr. no. S4440520	€60.95	Made-to-order item	View & order
Atag locking clip hydroblock	8139238 Mfr. no. S4747200	€69.95	Made-to-order item	View & order
Atag locking clip pipes hydroblock	8139590 Mfr. no. S4747100	€70.95	Made-to-order item	View & order

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Frequently asked questions

Which parts are available for the Buva EcoHeat 18-4?

The catalogue lists 108 original parts for the Buva EcoHeat 18-4, including fans, temperature sensors and NTC sensors, pressure sensors, flow sensors and flow switches. All parts are listed above, grouped by type, with part number and price.

How much does a fan for the Buva EcoHeat 18-4 cost?

The fans for this model cost €410.34 incl. VAT. Check the table "Fans" above for the right part number.

Are the parts for the Buva EcoHeat 18-4 in stock?

63 of the 108 parts are in stock; shipping to EU countries from €12.95 (€16.95 for more distant countries), usually 3–5 working days. Parts marked "Made-to-order item" are ordered specially for you; the delivery time is shown on the product page.

How do I know which part I need for the Buva EcoHeat 18-4?

Search for the part by part number or use the parts list of the Buva EcoHeat 18-4. Is your appliance showing a fault code? The fault code table shows the matching part type.

Are these original Buva parts?

Yes. All 108 parts in this list are original manufacturer parts for the Buva EcoHeat 18-4, supplied through the official technical wholesale channel and with the correct part number.

How much do parts for the Buva EcoHeat 18-4 cost?

Parts for the Buva EcoHeat 18-4 range from €18.95 to €1,015.38 incl. VAT. The exact price of each part is shown in the tables above.

Can I return a part?

As a consumer you have a 14-day right of withdrawal. You may unpack and inspect the part; do not install or connect it. For a part that has been installed, connected or damaged we deduct the diminished value, up to the full price for circuit boards.