Nesta Plus

High Efficiency Condensing Boilers

stainless steel fire tube heat exchanger

Nesta Plus

High Efficiency Condensing Boilers

This class leading design of the Nesta Plus with large volume primary water ensures maximum heat extraction. These features allow a large increase in power with minimal increase in the boiler footprint, the perfect solution when plantroom space is at a premium. The high volume of heating water ensures boiler stability and maximum heat extraction, making the Nesta Plus the perfect solution for any application with a high output requirement but limited plantroom space.

NOx class:

108 %

Thermal efficiency up to:

10:1

Modulation ratio

PERFORMANCE

heat input (net) G20	kW	44 - 265
heat input (net) G31	kW	66 – 265
heat output at 80/60°C G20	kW	42.2 - 258
heat output at 80/60°C G31	kW	64 – 258
heat output at 50/30°C G20	kW	47.3 - 281.6
heat output at 50/30°C G31	kW	70 – 276.8

EFFICIENCY

heating efficiency 80/60°C	%	96 - 97.4
heating efficiency 50/30°C	%	107.5 - 106.3
useful efficiency at 30% (return 30°C)	%	108.3
seasonal efficiency	%	93

GENERAL

water content	l	291
gas category		I2E(S). I2E. I2H. I2ELL. I2HS. I2N. I2EK. I3P. I2E(R). II2E3P. II2E(S)3P. II2EK3P. II2H3P. II2L3P. II2E+3P. II2E(R)3P. II2Esi3P. II2Er3P
gas type		G20 - G25 - G25.1 - G25.3 - G31
chimney type(s)		B23 - B23p - C43 - C53 - C63 - C83
CO emission	mg/kWh	26.8
gas flow rate (G20)	m3/h	4.5 - 26.2
gas flow rate (G31)	m3/h	2.5 - 10.2
NOx class		6

DIMENSIONS

boiler width (A)	mm	760
boiler height (B)	mm	1970
boiler depth (C)	mm	1310
empty weight	kg	578

CONNECTIONS

air inlet	mm	150
gas connection	in	G 1 1/2
water outlet	in	Flange DN 80 Class PN 16
water inlet	in	Flange DN 80 Class PN 16
chimney connection	mm	180
condensate drain	mm	26.7

Certificates (1)

Nesta Plus 280-350-420-570-700-840 – Chaudière au sol

pdf

Current technical manuals (3)

Nesta Plus (EN)	pdf
Webserver	pdf
Nesta Plus 280-840	pdf

Sales Brochures (2)

Nesta Plus	pdf
Product Overview 2023	pdf

BIM (2)

Nesta Plus	zip
Nesta Plus FSW	zip

Design

At the core of all Nesta Plus boilers is our stainless steel Fire Tube heat exchanger. The use of high-grade stainless steel alloys ensures product durability, reliability, and higher resistance to corrosion and oxidation.

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The unique Fire Tube design of Nesta heat exchangers is market proven technology, manufactured in Poland and distributed worldwide for many years.

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Responsive Modulation

Nesta Plus is a high output single pass condensing boiler with an impressive 10:1 modulation range. This places it as one of the best in class, providing high seasonal returns and significant savings on gas consumption.

Linear modulation addresses the needs of higher output plantrooms, which allows the boiler to consistently achieve maximum efficiency, limiting boiler cycling as much as possible. This technology is effective not only in new generation heating systems, but also in the replacement of older boilers in existing buildings.

Key Features & Benefits

Stainless steel heat exchanger
Self-cleaning flue ways
Internal circuit piping in welded stainless steel
Low pressure drop
Compact dimensions
Reduced maintenance
Lifting points for transportation and positioning
Low NOx

Control panel

Nesta Plus controller enables remote boiler management by web server connectivity. One of primary benefits of this advanced integrated control system is the optimalisation of periodic servicing using self diagnostics, assisting the engineer prior to attending site.